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Kimi K3 is now ahead of all proprietary models on the most comprehensive web engineering benchmark, matching Fable's success rate on the Next.js code generation benchmark while doing it faster.
Vercel CEO Guillermo Rauch says Kimi K3 is the first open model to beat all proprietary models on a major web engineering benchmark, matching Fable's Next.js code-gen success rate in less time. ✦ AI generated
Guillermo Rauch · Big Technology · 2026-07-20 · original ↗
This is the first time that an open model is ahead of all proprietary ones for this comprehensive web engineering benchmark," wrote Vercel CEO Guillermo Rauch, noting K3 reached a comparable success rate than Fable on the Next.js code generation benchmark, but K3 did it in less time.
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- ·Vercel CEO says K3 is first open model to lead every proprietary model
- ·Benchmark covers comprehensive web engineering tasks
- ·K3's success rate on Next.js code generation equals Fable's
- ·K3 achieves comparable result in less time than Fable
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Evidence · 2
The open-weight model ecosystem is maturing rapidly, with Kimi K3 rivaling frontier models and prompting a major industry letter arguing against US bans on open-weight AI.CJ · Syntax · conf 85%It is a huge open question why no US company is building a competitive open-weight low-cost model business when Chinese companies are proving it can be a viable $50-70 billion outcome.Rory · 20VC · conf 75%