GPT-5.6 Outperforms Claude Fable 5 on FrontierMath Tier 4?

Question

Resolves to the next GPT model released regardless of number. Only the “stock” GPT counts, so no mini, nano, pro, codex, etc

Manifold Markets · Answer

Roughly even odds — Manifold Markets prediction market estimates a 53% chance (2 traders, as of Jun 20, 2026).

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