Resolution criteria

Anthropic officially launched Claude Opus 4.6 on February 5, 2026, confirming that Opus 4.6 was released as a distinct model. Claude Sonnet 5 was rumored to be released the same week but has not yet appeared as of the creation of this question. The market resolves YES if Anthropic's official statements, documentation or a reliable source with substantial proof confirm that Sonnet 5 was not released because it was renamed to Opus 4.6. The market resolves NO if Sonnet 5 is released within a month (before March 5th 2026) or if credible evidence becomes available that it never existed in the first place. This question will resolve n/a if no substantial evidence appears within 30 days.

This description was partially generated by AI.