Fable 5.2 matches Opus 5.5 Max effort at half the cost, tops FrontierCode 2.0 at Xhigh
claudeai · x · 2026-11-10
Anthropic's FrontierCode 2.0 results show Fable 5.2 at High effort scoring roughly level with Opus 5.5 at Max effort for about half the cost per task, and setting the highest score of any released model at Xhigh effort.
Medium is the default in Claude apps and Claude Code. Attached charts plot score-vs-cost curves across effort levels, plus WANDR agentic search and BenchCAD 2.1 hardware engineering comparisons, where Fable 5.2 generally leads at equal cost.
Related event: Anthropic Releases Claude Fable 5.2 and Mythos 5.2(29 posts)→
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