Unverified50% confidenceBenchmarkExact time
On the Artificial Analysis Intelligence Index (v5.0), Claude Opus 5.5 and GPT-6 Astra rank immediately behind Gemini 4 Carbon.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/28/2026
First Seen
Valid until: 11/11/2026
Sources
Related Entities
Related Claims
UnverifiedClaude Opus 5.5 is a frontier-level intelligence model that provides a level of intelligence comparable to top models such as GPT-6 Astra, but is faster and cheaper.79% similarUnverifiedThe comparison targets chosen in the model card include GPT-6 Astra, Claude Fable 5.1, and Claude Opus 5.5, all evaluated at maximum reasoning effort.75% similarVerifiedOpus 5.5's release page directly uses GPT-6's Astra as its comparison target.74% similarUnverifiedGPT-6 Astra wins on efficiency and topology quality, Gemini 4 Argon wins on cost, and Claude Opus 5.5 wins on narrative depth and report completeness.73% similarUnverifiedBy per-token price, GPT-6 Astra is 2.5 times Claude Opus 5.5, while Gemini 4 Argon is only half of Opus.73% similar
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