#claude-opus-5-5

1 post tagged with "claude-opus-5-5"

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ai building

Opus 5.5 vs Fable 5.1: My Cost Per Turn Gap Went From 1.4x to 2.3x

Opus 5.5 beats Fable 5.1 on all nine of Anthropic's launch benchmarks at 40% of the price. Replayed at 5.5 prices, my measured day puts Fable at 2.3x per turn.

Sep 26, 2026 · 9 min