SWE-bench Pro Leaderboard Update: Claude Fable 5 at 80.3%, GPT-5.6 Sol/Terra/Luna Debut at 64.6/63.4/62.7%

CodingFleet·high signal

The SWE-bench Pro leaderboard was refreshed July 10 with GPT-5.6 Sol, Terra, and Luna entering at 64.6%, 63.4%, and 62.7%, while Claude Fable 5 (released June 9) holds 80.3% — a +11.1 point jump over Opus 4.8. Pro uses actively-maintained repos with no public ground-truth leakage, so the gap between it and the near-saturated Verified benchmark (Claude Mythos 5 at 95.5%) is the more honest signal of real-world coding ability. The ~16-point spread between the top Claude and top GPT-5.6 tier on Pro is the number to watch when routing hard agentic tasks.