Cognition's SWE-2

Cognition's coding model, 64% cheaper than Fable 5.1

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SWE-2 is Cognition's new coding model, post-trained from Kimi K3 with reinforcement learning that optimizes for cost and capability at the same time. It scores 50.0% on FrontierCode 1.1 Main, within a point of Fable 5.1 while costing 64% less, and lands within a few points of GPT-6 Astra at a quarter of the cost. Compared to SWE-1.7, it takes 58% fewer turns and costs 81% less while scoring higher. It is available now in Devin Desktop and CLI.