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Interactive DeepSWE v1.1 leaderboard updated with Muse Spark 1.3 at 75.4%, GPT-6 Astra at 74.1%, and Claude Fable 5.1 at 67.4%. 28+ models ranked by long-horizon software engineering ability. Updated September 2026.
Interactive SWE-bench Pro leaderboard: Claude Fable 5.1 takes #1 at 81.2%, with Mythos 5/Fable 5 at 80.3% and Opus 5 at 79.2%. 50+ models ranked by real coding ability. Updated September 8, 2026.