SWE-2 makes frontier coding cheaper, not just stronger
Cognition’s SWE-2 hits 50.0% on FrontierCode 1.1 Main, within one point of Fable 5.1 while costing 64% less. It also posts 73.0% on DeepSWE 1.1 and 92.8% on Terminal-Bench 2.1, suggesting the gain is broader than one headline benchmark. The model’s key training twist is a single RL run that teaches multiple reasoning-effort levels, giving developers more usable points across the cost-performance curve.