Unverified50% confidenceReleaseExact time

Anthropic launched Claude Opus 5.5, with capabilities close to the flagship Fable 5.1, costs reduced by 40%, and output speed improved by more than 30% compared to Opus 5.

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

9/30/2026

First Seen

Valid until: 12/29/2026

Sources

GPT-6 Dual Models Launch with 50% API Price Cut as AI Cost Wars Heat Up

Related Entities

Anthropiccompany Cloud Opus 5.5model Fable 5.1model Opus 5model

Related Claims

VerifiedClaude Opus 5's capabilities are close to the level of the previous-generation flagship Opus, but with significantly reduced inference costs.79% similar UnverifiedOpus 5.5 is less token-efficient than Opus 5: Opus 5's max tier uses 73k tokens per task, Fable uses 78k, Opus 5.5's max tier approaches 120k tokens, while GPT-6 Astra only requires 27k.72% similar VerifiedClaude Opus 5.5 generates output more than 30% faster than Opus 5.71% similar UnverifiedOpus 5's pass rate at Low Effort is approximately 60%, surpassing Opus 4.8's 59% at the Max level, for which the per-task cost is as high as $13.70% similar

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