Three coding-focused AI models are splitting the leaderboards this month, and none of them agree on who’s actually winning. Claude Fable 5.1 tops Anthropic’s own coding-specialist line. GPT-5.6 Sol leads the independent SWE-bench Verified harness at 96.2%. And GLM-5.3, released by Z.ai on August 14, 2026, just posted the biggest single-version jump of the year…
