Head to head

Claude Fable 5.1 vs Claude Opus 5

⚖ Claude Fable 5.1 wins 3 of 4 categories, but Claude Opus 5 is 2.0× cheaper for everyday text work. Pick Claude Fable 5.1 when quality matters most, Claude Opus 5 at volume.

Scores by category

CategoryClaude Fable 5.1Claude Opus 5
Overall9286
Writing9086
Support8384
Coding8984

Provisional scores, 0 to 100 among the models we track, from Arena and Epoch AI. Value weighs the overall score against cost.

Price and specs

Claude Fable 5.1Claude Opus 5
VendorAnthropicAnthropic
Released2026-09-012026-07-24
Context window1M1M
Open weightsNoNo
Input per 1M tokens$10.00$5.00
Output per 1M tokens$50.00$25.00
Per 1,000 tasks$40.00$20.00
claude-fable-5-1.app
Claude Fable 5.1Full details →Alternatives to Claude Fable 5.1 →
claude-opus-5.app
Claude Opus 5Full details →Alternatives to Claude Opus 5 →
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Claude Fable 5.1 vs Claude Opus 5: scores, price and which to pick · Model Menu