Unverified50% confidenceReleaseExact time
Anthropic released Opus 5.5, skipping Opus 5.1 and jumping directly to the 5.5 naming.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/25/2026
First Seen
Valid until: 12/24/2026
Sources
Related Entities
Related Claims
UnverifiedThe poster felt that Opus 5.5 is like Opus 4.6, but much better.75% similarUnverifiedAnthropic plans to release Opus 5.5, with the internal test codename "Cloud1".73% similarUnverifiedFable 5.1's water surface effects are on par with those of the previous Fable 5 or Opus 5, with no notable improvement.60% similarUnverifiedThere is no unified standard for version number naming in the AI industry; for example, Google's Gemini .5 versions are actually major architectural upgrades.60% similarUnverifiedAccording to leaks, Gemini 4.0 Pro is this time targeting Astra and Fable 5.1 as its competitors.57% similar
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