Product

SWE-2

2 mentions in 7 days · 2 in 30 days · 2 total · first seen Sep 10, 2026 · last 5d ago

Timeline2 articles

Cognition's SWE-2 achieves 92.8 on Terminal-Bench 2.1

Cognition releases SWE-2, a 2.8T-parameter MoE coding model post-trained from Kimi K3, scoring 92.8 on Terminal-Bench 2.1.

SWE-2 is a proprietary mixture-of-experts model with 2.8T total parameters and 104B active per token, built on the Kimi K3 base with additional Cognition reinforcement-learning post-training for agentic coding. Vendor-reported benchmarks include FrontierCode 1.1 Main 50.0, DeepSWE 1.1 73.0, Terminal-Bench 2.1 92.8, and Terminal-Bench 4.0 27.3. It claims to be one point behind Claude Fable 5.1 on FrontierCode at a claimed 64% lower cost, but trails Fable 5.1 and GPT-6 Astra by a wide margin on long-horizon Terminal-Bench 4.0 tasks. The model is available today in Devin Desktop and CLI, with no published weights, no per-token API pricing, and all figures pending independent replication.

Hacker News · AIupdated Sep 12, 13:10 UTC · 3d agofirst Sep 10, 16:52 UTC · 5d agoModel release 8 sources HN 40↑ · 18 comments

Cognition launches new SWE-2 model, Rivaling Fable 5.1 and GPT-Astra

Cognition released SWE-2, a coding model post-trained from Kimi K3 that scores 50.0% on FrontierCode 1.1 Main, near Fable 5.1 at 64% lower cost.

Cognition introduced SWE-2, its most advanced coding model, post-trained from the 2.8T-parameter Kimi K3 base model. It achieves 50.0% on FrontierCode 1.1 Main, 73.0% on DeepSWE 1.1, and 92.8% on Terminal-Bench 2.1, beating Grok 4.6 and SWE-1.7 while matching Fable 5.1 and GPT-5.6 Sol at a fraction of the price. The company says it scaled reinforcement learning to the multi-trillion-parameter regime for the first time, using Pareto-informed cost penalties that train all reasoning-effort levels in a single run, tripled RL environments, and NVFP4/FP8 quantization-aware training. SWE-2 is available today in Devin Desktop and CLI, with rollout on Devin Web and Fusion.

Hacker News · AIupdated Sep 12, 13:10 UTC · 3d agofirst Sep 10, 15:29 UTC · 5d agoModel release 8 sources HN 58↑ · 15 comments1

Appears with

organization Cognition 2 product Devin 2 ai model GPT-6 Astra 2 ai model Kimi K3 2 vendor Cognition 2 ai model SWE-2 2 ai model Claude Fable 5.1 1 vendor Moonshot AI 1 ai model Fable 5.1 1 ai model GPT-5.6 Sol 1 ai model Grok 4.6 1 product Devin CLI 1 product Devin Desktop 1

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