The $29.3 billion AI coding tool just got caught with its provenance showing. When Cursor launched Composer 2 last week — calling it “frontier-level coding intelligence” — it presented the model as evidence that the company is a serious AI research lab, not just a forked integrated development environment (IDE) wrapping someone else’s foundation model. What the announcement omitted was that Composer 2 was built on top of Kimi K2.5, an open-source model from Moonshot AI, a Chinese startup backed by Alibaba, Tencent and HongShan (the firm formerly known as Sequoia China).
A developer named Fynn (@fynnso) on X figured it out within hours. By setting up a local debug proxy server and routing Cursor’s API traffic through it, Fynn intercepted the outbound request and found the model ID in plain sight: accounts/anysphere/models/kimi-k2p5-rl-0317-s515-fast.
“So composer 2 is just Kimi K2.5 with RL,” Fynn wrote. “At least rename the model ID.” The post racked up 2.6 million views.
In a follow-up, Fynn noted that Cursor’s previous model, Composer 1.5, blocked this kind of request interception — but Composer 2 did not, calling it “probably an oversight.” Cursor quickly patched it, but the fact was clearly out.
Cursor’s VP of Developer Education, Lee Robinson, confirmed the Kimi connection within hours, and co-founder Aman Sanger acknowledged it was a mistake not to disclose the base model from the start.
But the story that matters here is not about one company’s disclosure failure. It is about why Cursor — and likely many other AI product companies — turned to a Chinese open model in the first place.
Cursor’s decision to build on Kimi K2.5 was not random. The model is a 1 trillion parameter mixture-of-experts architecture with 32 billion active parameters, a 256,000-token context window, native image and video support, and an Agent Swarm capability that runs up to 100 parallel sub-agents simultaneously.
Released under a modified MIT license that permits commercial use, Kimi K2.5 is competitive with the best models in the world on agentic benchmarks and scored first among all models on MathVista at release.
When an AI product company needs a strong open model for continued pretraining and reinforcement learning — the kind of deep customization that turns a foundation into a differentiated product — the options from Western labs have been surprisingly thin.
Meta’s Llama 4 Scout and Maverick shipped in April 2025, but they were severely lacking, and the much-anticipated Llama 4 Behemoth has been indefinitely delayed. As of March 2026, Behemoth still has no public release date, with reports suggesting Meta’s internal teams are not convinced the 2-trillion-parameter model delivers enough of a performance leap to justify shipping it.
Google’s Gemma 3 family topped out at 27 billion parameters — excellent for edge and single-accelerator deployment, but not a frontier-class foundation for building production coding agents. Gemma 4 has yet to be announced, though it has sparked speculation that a release may be imminent.
And then there’s OpenAI, which released arguably the most conspicuous American open source contender, the gpt-oss family (in 20-billion and 120-billion parameter variants) in August 2025. Why wouldn’t Cursor build atop this model if it needed a base model to fine-tune?
The answer lies in the “intelligence density” required for frontier-class coding. While gpt-oss-120b is a monumental achievement for Western open source—offering reasoning capabilities that rival proprietary models like o4-mini—it is fundamentally a sparse Mixture-of-Experts (MoE) model that activates only 5.1 billion parameters per token. For a general-purpose reasoning assistant, that is an efficiency masterstroke; for a tool like Composer 2, which must maintain structural coherence across a 256,000-token context window, it is arguably too “thin.” By contrast, Kimi K2.5 is a 1-trillion-parameter titan that keeps 32 billion parameters active at any given moment. In the high-stakes world of agentic coding, sheer cognitive mass still dictates performance, and Cursor clearly calculated that Kimi’s 6x advantage in active parameter count was essential for synthesizing the “context explosion” that occurs during complex, multi-step autonomous programming tasks.
Beyond raw scale, there is the matter of structural resilience. OpenAI’s open-weight models have gained a quiet reputation among elite developer circles for being “post-training brittle”—models that are brilliant out of the box but prone to catastrophic forgetting when subjected to the kind of aggressive, high-compute reinforcement learning Cursor required.
Cursor didn’t just apply a light fine-tune; they executed a “4x scale-up” in training compute to bake in their proprietary self-summarization logic. Kimi K2.5, built specifically for agentic stability and long-horizon tasks, provided a more durable “chassis” for these deep architectural renovations. It allowed Cursor to build a specialized agent that could solve competition-level problems, like compiling the original Doom for a MIPS architecture, without the model’s core logic collapsing under the weight of its own specialized training.
That leaves a gap. And Chinese labs — Moonshot, DeepSeek, Qwen, and others — have filled it aggressively. DeepSeek’s V3 and R1 models caused a panic in Silicon Valley in early 2025 by matching frontier performance at a fraction of the cost. Alibaba’s Qwen3.5 family has shipped models at nearly every parameter count from 600 million to 397 billion active parameters. Kimi K2.5 sits squarely in the sweet spot for companies that want a powerful, open, customizable base.
Cursor is not the only product company in this position. Any enterprise building specialized AI applications on top of open models today confronts the same calculus: the most capable, most permissively licensed open foundations disproportionately come from Chinese labs.
To its credit, Cursor did not just slap a UI on Kimi. Lee Robinson stated that roughly a quarter of the total compute used to build Composer 2 came from the Kimi base, with the remaining three quarters from Cursor’s own continued training. The company’s technical blog post describes a technique called self-summarization that addresses one of the hardest problems in agentic coding: context overflow during long-running tasks.
When an AI coding agent works on complex, multi-step problems, it generates far more context than any model can hold in memory at once. The typical workaround — truncating old context or using a separate model to summarize it — causes the agent to lose critical information and make cascading errors. Cursor’s approach trains the model itself to compress its own working memory in the middle of a task, as part of the reinforcement learning process. When Composer 2 nears its context limit, it pauses, compresses everything down to roughly 1,000 tokens, and continues. Those summaries are rewarded or penalized based on whether they helped complete the overall task, so the model learns what to retain and what to discard over thousands of training runs.
The results are meaningful. Cursor reports that self-summarization cuts compaction errors by 50 percent compared to heavily engineered prompt-based baselines, using one-fifth the tokens. As a demonstration, Composer 2 solved a Terminal-Bench problem — compiling the original Doom game for a MIPS processor architecture — in 170 turns, self-summarizing over 100,000 tokens repeatedly across the task. Several frontier models cannot complete it. On CursorBench, Composer 2 scores 61.3 compared to 44.2 for Composer 1.5, and reaches 61.7 on Terminal-Bench 2.0 and 73.7 on SWE-bench Multilingual.
Moonshot AI itself responded supportively after the story broke, posting on X that it was proud to see Kimi provide the foundation and confirming that Cursor accessed the model through an authorized commercial partnership with Fireworks AI, a model hosting company. Nothing was stolen. The use was commercially licensed.
Cursor co-founder Aman Sanger acknowledged the omission, saying it was a miss not to mention the Kimi base in the original blog post. The reasons for that silence are not hard to infer. Cursor is valued at nearly $30 billion on the premise that it is an AI research company, not an integration layer. And Kimi K2.5 was built by a Chinese company backed by Alibaba — a sensitive provenance at a moment when the US-China AI relationship is strained and government and enterprise customers increasingly care about supply chain origins.
The real lesson is broader. The whole industry builds on other people’s foundations. OpenAI’s models are trained on decades of academic research and internet-scale data. Meta’s Llama is trained on data it does not always fully disclose. Every model sits atop layers of prior work. The question is what companies say about it — and right now, the incentive structure rewards obscuring the connection, especially when the foundation comes from China.
For IT decision-makers evaluating AI coding tools and agent platforms, this episode surfaces practical questions: do you know what’s under the hood of your AI vendor’s product? Does it matter for your compliance, security, and supply chain requirements? And is your vendor meeting the license obligations of its own foundation model?
The good news for enterprises concerned about model provenance is that it does seem Western open models are about to get significantly more competitive. NVIDIA has been on an aggressive release cadence. Nemotron 3 Super, released on March 11, is a 120-billion-parameter hybrid Mamba-Transformer model with 12 billion active parameters, a 1-million-token context window, and up to 5x higher throughput than its predecessor. It uses a novel latent mixture-of-experts architecture and was pre-trained in NVIDIA’s NVFP4 format on the Blackwell architecture. Companies including Perplexity, CodeRabbit, Factory, and Greptile are already integrating it into their AI agents.
Days later, NVIDIA followed with Nemotron-Cascade 2, a 30-billion-parameter MoE model with just 3 billion active parameters that outperforms both Qwen 3.5-35B and the larger Nemotron 3 Super across mathematics, code reasoning, alignment, and instruction-following benchmarks. Cascade 2 achieved gold-medal-level performance on the 2025 International Mathematical Olympiad, the International Olympiad in Informatics, and the ICPC World Finals — making it only the second open-weight model after DeepSeek-V3.2-Speciale to accomplish that. Both models ship with fully open weights, training datasets, and reinforcement learning recipes under permissive licenses — exactly the kind of transparency that Cursor’s Kimi episode highlighted as missing.
The Cursor-Kimi episode is a preview of a recurring pattern. As AI product companies increasingly build differentiated applications through continued pretraining, reinforcement learning, and novel techniques like self-summarization on top of open foundation models, the question of which foundation sits at the bottom of the stack becomes a matter of enterprise governance — not just technical preference.
NVIDIA’s Nemotron family and the anticipated Gemma 4 represent the strongest near-term candidates for closing the Western open-model gap. Nemotron 3 Super’s hybrid architecture and million-token context window make it directly relevant for the same agentic coding use cases that Cursor addressed with Kimi. Cascade 2’s extraordinary intelligence density — gold-medal competition performance at just 3 billion active parameters — suggests that smaller, highly optimized models trained with advanced RL techniques can increasingly substitute for the massive Chinese foundations that have dominated the open-model landscape.
But for now, the line between American AI products and Chinese model foundations is not as clean as the geopolitical narrative suggests. One of the most-used coding tools in the world runs on a model backed by Alibaba — and may not originally have been meeting the attribution requirements of the license that enabled it. Cursor says it will disclose the base model next time. The more interesting question is whether, next time, it will have a credible Western alternative to disclose.
Presented by Tulsa Innovation Labs
As the global energy system evolves, companies are racing to adopt technologies that can deliver real-world solutions, especially in hard-to-abate industries. Oklahoma, long known as the oil capital of the world, is a center for energy innovation, with Rose Rock Bridge at the forefront.
A non-profit based in Tulsa, Rose Rock Bridge is a pilot deployment studio that connects early-stage energy startups with corporate energy partners, non-dilutive funding, and pilot opportunities that accelerate commercialization. Now accepting applications for its Spring 2026 cohort through April 6, it is seeking early- and growth-stage startups developing practical, scalable solutions to today’s most pressing energy challenges.
Rose Rock Bridge gives startups access to real-world commercial workflows and pilot opportunities through energy partners with more than $150 billion in market capitalization, including Devon Energy, H&P, ONEOK, and Williams. Backed by one of the strongest coalitions of strategic partners and investors of any energy-focused accelerator, incubator, or venture studio, the program enables startups to move quickly from development to real-world testing and deployment.
Here’s how it works:
Rose Rock Bridge starts by working directly with corporate innovation teams to identify high priority technology solutions for their businesses, pinpointing which solutions will carry the most impact. Focus areas are formed around these findings.
“We don’t just chase the latest tech and hope to find a use for it. Our process starts at the asset level — identifying the specific operational bottlenecks and unmet requirements our partners are actually facing,” says Nishant Agarwal, Innovation Manager. “By leveraging our background in CVC and engineering, we run technical deep dives alongside partner subject matter experts to define the requirement first. We then source technologies as a direct response to those needs. This ensures we aren’t just presenting ‘interesting research,’ but delivering solutions with a validated deployment pathway and a clear line of sight to a business case.”
Tapping into its network of 40+ universities, 10+ energy incubators, and Fortune 500 companies, Rose Rock Bridge then determines emerging opportunities in the energy ecosystem. Rather than just selecting companies or ideas that might bring in capital, the studio chooses startups that have real potential to commercialize quickly in order to solve the industry’s most pressing challenges.
This year’s focus areas include:
Operational Agility & Integration
Reservoir & Production Enhancement
Fluid Systems
Robotics
“We’re evaluating deployment probability from day one,” says Andrada Pantelimon, Innovation Associate at Rose Rock Bridge, who manages sourcing strategy and startup operations. “Can this technology deliver a measurable bottom-line impact? Can it realistically pilot within 12 months? Is your team equipped to commercialize? Show us you’ve quantified your value proposition in operator terms and understand which business unit within a corporation might own this solution. If you can articulate those pieces clearly, you’re the kind of startup we want to support.”
The benefit is tangible for leading energy corporations seeking proven solutions to complex operational challenges. Rose Rock Bridge provides its corporate partners with validated, field-tested technologies while significantly reducing deployment risk. At the program’s conclusion, partners gain direct access to emerging innovations that have already undergone technical validation and operational feasibility assessment, with identified procurement pathways and pilot plans designed for commercial deployment.
Each cohort cycle, up to 15 startups are selected to enter a six-week virtual accelerator focused on pilot deployment. Founders participate in reverse pitch sessions with oil and gas partners, one-on-one clinics with industry and capital mentors, and hands-on commercialization workshops. Founders have the unique opportunity to refine their solutions, assess pilot feasibility, and build industry relationships. This approach derisks adoption and investments through iterative customer feedback, in-field testing, and pilots, enabling breakthrough technologies to reach commercial viability quickly and effectively.
“Our curriculum is singularly focused on preparing startups for the realities of corporate partnerships.,” says Devon Fanfair, Rose Rock Bridge Manager and former Techstars Managing Director who is scaling the RRB program. “Founders aren’t just learning, they’re actively testing their assumptions with the exact customers who might deploy their technology. That rapid feedback loop is what transforms promising technologies into deployment-ready solutions with clear commercial pathways.”
At the culmination of the accelerator, teams participate in the Rose Rock Bridge showcase with the unique opportunity to pitch their startup to the energy corporate partners they’ve worked alongside for the past six weeks. Four startups are selected to receive up to $100,000 in non-dilutive funding and opportunities for business support services, joining a one-year cohort designed to prepare technologies for market adoption.
“Rose Rock Bridge is a cornerstone of Tulsa Innovation Labs’ strategy to showcase our region as a national hub for energy innovation,” added Jennifer Hankins, Managing Director of Tulsa Innovation Labs. “By linking emerging technologies with some of the nation’s largest energy leaders, we help move innovation from concept to market faster, drawing new businesses to the region, enhancing our existing businesses, and reinforcing Tulsa’s role in the global energy economy.”
Once selected to become members of Rose Rock Bridge, startups then pilot their technology with relevant energy partners and grow their venture in Tulsa. Support includes pilot design, execution, and go-to-market strategy, connections to follow-on investment opportunities, subsidized access to services including legal, marketing, PR, and support establishing a Tulsa presence for partner access.
Rose Rock Bridge’s success is measured not just in pilot deployments, but in lasting commercial relationships. Multiple portfolio companies have progressed from initial field tests to multi-year contracts with Fortune 500 operators. By derisking the path from proof-of-concept to procurement, RRB has helped establish procurement pathways that might otherwise take years to develop, if they materialize at all.
Launched in 2022 with support from Tulsa Innovation Labs, the studio has helped companies advance new technologies, secure patents, launch products, and attract capital. It has derisked 33 startups, supported 16 active or in-development pilots, and invested more than $2 million in early-stage companies, generating a combined portfolio valuation of over $55 million.
Examples of the studio’s success include Safety Radar, an AI-powered risk management platform, which secured its first contract with a Rose Rock Bridge partner, expanded to additional energy and aerospace clients, raised over $2 million, and established a Tulsa office. Kinitics Automation, a Canadian company, successfully piloted with one partner, resulting in deployments across multiple sites, effectively using RRB as their gateway to the U.S. market.
Backed by corporate partners with more than $150 billion in combined market capitalization, Rose Rock Bridge reflects both the scale of the opportunity and Tulsa’s rising influence in energy innovation.
Devon Fanfair is Manager of Rose Rock Bridge.
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Not long ago, the idea of being a “generalist” in the workplace had a mixed reputation. The stereotype was the “jack of all trades” who could dabble in many disciplines but was a “master of none.” And for years, that was more or less true.
Most people simply didn’t have access to the expertise required to do highly cross-functional work. If you needed a new graphic, you waited for a designer. If you needed to change a contract, you waited for legal. In smaller organizations and startups, this waiting game was typically replaced with inaction or improvization — often with questionable results.
AI is changing this faster than any technology shift I’ve seen. It’s allowing people to succeed at tasks beyond their normal area of expertise.
Anthropic found that AI is “enabling engineers to become more full-stack in their work,” meaning they’re able to make competent decisions across a much wider range of interconnected technologies. A direct consequence of this is tasks that would have been left aside due to lack of time or expertise are now being accomplished (27% of AI-assisted work per Anthropic’s study).
This shift is closely mirroring the effects of past revolutionary technologies. The invention of the automobile or the computer did not bring us a wealth of leisure time — it mainly led us to start doing work that could not be done before.
With AI as a guide, anyone can now expand their skillsets and augment their expertise to accomplish more. This fundamentally changes what people can do, who can do it, how teams operate, and what leaders should expect.
Well, not so fast.
The AI advances have been incredible, and if 2025 may not have fully delivered its promise of bringing AI agents to the workforce, there’s no reason to doubt it’s well on its way. But for now, it’s not perfect. If to err is human, to trust AI not to err is foolish.
One of the biggest challenges of working with AI is identifying hallucinations. The term was coined, I assume, not as a cute way to refer to factual errors, but as quite an apt way of describing the conviction that AI exhibits in its erroneous answers. We humans have a clear bias toward confident people, which probably explains the number of smart people getting burned after taking ChatGPT at face value.
And if experts can get fooled by an overconfident AI, how can generalists hope to harness the power of AI without making the same mistake?
It’s tempting to compare today’s AI vibe coding wave to the rise of low- and no-code tools. No-code tools gave users freedom to build custom software tailored to their needs. However, the comparison doesn’t quite hold. The so-called “citizen developers” could only operate inside the boundaries the tool allowed. These tight constraints were limiting, but they had the benefit of saving the users from themselves — preventing anything catastrophic.
AI removes those boundaries almost entirely, and with great freedom comes responsibilities that most people aren’t quite prepared for.
The first stage of ‘vibe freedom’ is one of unbridled optimism encouraged by a sycophantic AI. “You’re absolutely correct!” The dreaded report that would have taken all night looks better than anything you could have done yourself and only took a few minutes.
The next stage comes almost by surprise — there’s something that’s not quite right. You start doubting the accuracy of the work — you review and then wonder if it wouldn’t have been quicker to just do it yourself in the first place.
Then comes bargaining and acceptance. You argue with the AI, you’re led down confusing paths, but slowly you start developing an understanding — a mental model of the AI mind. You learn to recognize the confidently incorrect, you learn to push back and cross-check, you learn to trust and verify.
This is a skill that can be learned, and it can only be learned on the job, through regular practice. This doesn’t require deep specialization, but it does require awareness. Curiosity becomes essential. So does the willingness to learn quickly, think critically, spot inconsistencies, and to rely on judgment rather than treating AI as infallible.
That’s the new job of the generalist: Not to be an expert in everything, but to understand the AI mind enough to catch when something is off, and to defer to a true specialist when the stakes are high.
The generalist becomes the human trust layer sitting between the AI’s output and the organization’s standards. They decide what passes and what gets a second opinion.
That said, this only works if the generalist clears a minimum bar of fluency. There’s a big difference between “broadly informed” and “confidently unaware.” AI makes that gap easier to miss.
Clearly, specialists will not be replaced by AI anytime soon. Their work remains critical. It will evolve to become more strategic.
What AI changes is everything around the edges. Roles that felt important but were hard to fill, tasks that sat in limbo because no expert was available, backlogs created by waiting for highly skilled people to review simple work. Now, a generalist can get much farther on their own, and specialists can focus on the hardest problems.
We’re already starting to see an impact in the hiring landscape. Companies are looking to bring on individuals who are comfortable navigating AI. People who embrace it and use it to take on projects outside of their comfort zone.
Performance expectations will shift too. Many leaders are already looking less at productivity alone, and more at how effectively someone uses AI. We see token usage not as a measure of cost, but as an indicator of AI adoption, and perhaps optimistically, as a proxy for productivity.
Use AI to enhance work, not to wing it: You will get burned letting AI loose. It requires guidance and oversight.
Learn when to trust and when to verify: Build an understanding of the AI mind so you can exercise good judgement on the work produced. When in doubt or when the stakes are high, defer to specialists.
Set clear organizational standards: AI thrives on context and humans, too. Invest in documentation of processes, procedures, and best practices.
Keep humans in the loop: AI shouldn’t remove oversight. It should make oversight easier.
Without these factors, AI work stays in the “vibe” stage. With them, it becomes something the business can actually rely on.
The emerging, AI-empowered generalist is defined by curiosity, adaptability, and the ability to evaluate the work AI produces. They can span multiple functions, not because they’re experts in each one, but because AI gives them access to specialist-level expertise. Most importantly, this new generation of generalists knows when and how to apply their human judgment and critical thinking. That’s the real determining factor for turning vibes into something reliable, sustainable, and viable in the long run.
Cedric Savarese is founder and CEO of FormAssembly.
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