Key Summary
AI Summary: Anthropic's Claude Fable 5 hits 88 percent accuracy on the hardest FrontierMath tier, a massive jump from Opus 4.5, which sat below 10 percent in early 2026. OpenAI's GPT-5.5 reach
Why It Matters
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Key Information
- Source: The Decoder
- Category: news
- Tags: AI News, Models, Research
- Original link: https://the-decoder.com/claude-fable-5-outpaces-gpt-5-5-by-13-points-on-frontiermaths-toughest-problems/