Claude's new models exposed: new Fable, new Opus...

What happened: Two new Claude models were exposed, Fable 5.5 and a next generation Opus, and have entered early testing. A claude-fable-5-5 entry briefly appeared in the Azure model catalog before being deleted. Key numbers: A model codenamed Obsidian 3 scored slightly higher than the current Opus 5.5 on a benchmark platform. Why it matters: The leaks come as Anthropic starts its IPO process, and the content frames the releases as a way to show technical strength and fast iteration ahead of listing.

Two new Claude models were exposed, Fable 5.5 and a next generation Opus, and have entered early testing. A claude-fable-5-5 entry briefly appeared in the Azure model catalog before being deleted.

The leaks come as Anthropic starts its IPO process, and the content frames the releases as a way to show technical strength and fast iteration ahead of listing.