Expired60% confidenceEventExact time
A similar Sonnet 5 leak (codenamed Phoenix) appeared in February of this year, but the model that was ultimately officially released was Sonnet 4.6, not Sonnet 5.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/22/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/20/2026(expired)
Sources
Related Claims
UnverifiedClaude Sonnet 4 is positioned above the previous Opus series, with the company officially describing it as a new category within the Sonnet series.76% similarVerifiedUnreleased model version numbers Opus 4.7 and Sonnet 4.8 appeared in the leaked code.73% similarUnverifiedSonnet 5 has switched to the tokenizer from Opus 4.7.70% similarUnverifiedGenSpark Claw supports running mainstream models such as Sonnet 4.6.68% similarUnverifiedIn a macOS interface cloning task, Sonnet 5 generated a complete desktop environment, but took approximately 40 minutes and consumed a large number of tokens in the workbench.63% similar
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