Cognition released SWE-2 on September 10, a coding-agent model post-trained from Kimi K3, Moonshot AI’s open 2.8-trillion-parameter base. It approaches Fable 5.1 on coding benchmarks at a claimed 64% lower cost, but collapses on Terminal-Bench 4 — the signal that its gains do not generalize to the hardest test.

On August 5, 2026, Meta entered the coding agent market with Muse Code, a terminal agent powered by Muse Spark 1.2. Rather than competing on raw model intelligence, Meta built the most advanced agent harness on the market: multi-agent fan-out, isolated git worktrees, full JSONL audit logging, and pricing up to 10× lower than Claude Code. Here’s what it means for DevOps teams.