Unverified50% confidenceOpinionExact time
Claude Opus 5.5 represents the largest iteration since Opus went from 4.5 to 4.6.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/29/2026
First Seen
Valid until: 12/28/2026
Sources
Related Entities
Related Claims
UnverifiedBoth the Claude Opus 4.7 and 4.8 series belong to the high-consumption tier.77% similarUnverifiedClaude Opus 5.5 is available today on all platforms.74% similarUnverifiedClaude Opus 5.5 surpasses Opus 5 and Fable 5.1 on nearly all benchmarks reported by Anthropic, with particular leads in agentic coding and real-world knowledge work.73% similarUnverifiedExisting prompts written for Opus 5 run on Opus 5.5 without modification.72% similarUnverifiedOpus 5 is the flagship model of Anthropic's Claude series, known for its longer context window (capable of handling codebases of hundreds of thousands of tokens) and more cautious output style.71% similar
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