Cognition releases coding model SWE-2 built on China's Kimi K3 — nearly on par with GPT-6 Astra at a quarter of the price
Prepared by Sintelligent with the help of SI. Publication time restored from the build log. . Updated: .
Open Chinese models are becoming the foundation for American products — strong SI for programming is getting several times cheaper.
The developer of the Devin agent fine-tuned Moonshot's open Kimi K3 model with 2.8 trillion parameters and for the first time applied reinforcement learning at "multi-trillion" scale with a cost penalty. SWE-2 scored 50% on FrontierCode 1.1 at a price 64% lower than Claude Fable 5.1's, and trails GPT-6 Astra by a few points at a quarter of the cost; on Terminal-Bench 2.1 it scored 92.8%. The model is already available in all versions of Devin.
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