WhichAI / Compare / Claude Opus 5 vs Claude Fable 5

Claude Opus 5vsClaude Fable 5

Claude Opus 5 scores higher on the July 16 index. Full context below: price, context window, strengths and honest limits. Verified July 26, 2026.

Claude Opus 5

Claude Fable 5

Provider

AA index

60.7

59.9

Released

2026-07-24

n/a

Context

Price $/1M

$5 / $25

$10 / $50

Access

Released July 24, 2026 · Claude Pro / Max plans · API $5/$25 per 1M tokens (Fast mode $10/$50)

Claude Pro / Max plans (usage credits since July 7) · API $10/$50 per 1M tokens

n/a = not published or not yet verified. Scores marked ~ are WhichAI estimates and should not be compared 1:1 with measured scores.

In one line each

Claude Opus 5: Anthropic's fourth release in two months and the new overall #1: tops the AA Intelligence Index (60.7) and the Agentic Index (55.3) with 1M context, default thinking and computer use, at unchanged Opus pricing. Near-Fable quality at half the price.

Claude Fable 5: Anthropic's newest flagship (Mythos-class) - tops the AA index at max effort and leads creative-writing boards for voice, subtext and character work; briefly export-controlled, now globally available.

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