Expired50% confidenceFactExact time
Claude Fable 5.1 launched with a cache price of 2.5%, Claude Opus 5.5 and GPT-6.1 Sol both at 5%, and by October 7 Anthropic also halved the Sonnet 5.5 cache price to 5%.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/11/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/25/2026(expired)
Sources
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Related Claims
UnverifiedOn some dimensions, Claude Sonnet 5.5 trails the more expensive Opus 5.5 by only 2 points.75% similarUnverifiedSonnet 5.5 and Opus 5.5 have the same cache read price, while Sonnet 5.5 is approximately half the price on all other items.74% similarUnverifiedOpus 5.5 at the Max tier requires $14.65 to achieve the same score as GPT-6.1 Sol, meaning 6.1 Sol is approximately 73 times cheaper.71% similarUnverifiedOn Frontier Code, the performance gap among GPT-6 Sol, Luna, and Opus 5.5 is only about 6–7 percentage points, but their prices range from 10 cents, to $2, to $4.69% similarUnverifiedOn the Frontier Code benchmark, GPT-6 Luna scored 56.1%, Claude Sonnet 5.0 scored 56.2%, and Kimi K3 scored 58.2%.69% similar
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