Claude Fable 5.1 vs Claude Opus 5.5: scores, price and which to pick

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Our take

Claude Opus 5.5 wins 4 of 4 categories and costs less: 2.5× cheaper for everyday text work. Easy pick.

Overall9297Best

Coding89100Best

Writing90100Best

Support8390Best

Value7383Best

Input / 1M$10.00$4.00Best

Output / 1M$50.00$20.00Best

Blended / 1M$20.00$8.00Best

Context window1M1M

Open weightsNoNo

Released1 Sept 202622 Sept 2026

Your monthly bill

Tasks per month50k

Claude Fable 5.1$4.0k

Claude Opus 5.5$1.6kCheapest

List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.