Astra still king at verifiable coding tasks 2 months post-release, dev benchmarks show
JoshPurtell · x · 2026-11-11
Developer JoshPurtell reports Astra remains shockingly good at high-complexity, verifiable tasks two months after release, while Claude Fable 5.2 is stronger at interactive/non-verifiable work. A quoted post claims Astra 6 "brutally" outperforms Opus 5.5 at formal verification with TLA. The attached leaderboard shows GPT-6 Astra first at 72.6% (94.1% pass rate), Claude Fable 5.2 second at 69.3%, and Claude Opus 5.5 fifth at 65.9%. He speculates Astra may simply be a bigger model.
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