Releases·Model Releasefeatured
Claude Opus 5.5 takes the top spot on the Artificial Analysis Intelligence Index, along with a 20% price cut and larger cache hit discount
Claude Opus 5.5 claims the top three positions on the Artificial Analysis Intelligence Index v4.3.2, a capability-only ranking that excludes cost. Reports note Opus 5.5 at high effort matches Fable 5.1 at max effort. A post also cites a 20% price cut and a larger cache hit discount accompanying the model.
622 engagement3 sourcesTue, Sep 22, 2026, 04:44 PM
AI Overview
- Claude Opus 5.5 takes the top spot on the Artificial Analysis Intelligence Index
- Anthropic cuts Claude Opus 5.5 pricing by 20%
- Claude Opus 5.5 gets a larger discount on cache hits
- Opus 5.5 holds the top three spots on the capability-only Index v4.3.2, with high effort matching Fable 5.1 at max effort
Related
Releases·Model Releasefeatured
Anthropic launches Claude Opus 5.5 via X announcement, prompting questions on Gemini 4 timing
Anthropic announced Claude Opus 5.5 via the Claude X account, and GitHub confirmed the model is now available in GitHub Copilot. No benchmarks, pricing, or technical details appear in the posts. A Reddit thread speculates on when Google will answer with Gemini 4.
Anthropic announced Claude Opus 5.5 via the Claude X account, and GitHub confirmed the model is now available in GitHub Copilot. No benchmarks, pricing, or technical details appear in the posts. A Reddit thread speculates on when Google will answer with Gemini 4.
Updated Tue, Sep 22, 2026, 05:40 PM — GitHub confirms Opus 5.5 is now available in GitHub Copilot.
320 engagement2 sourcesredditTue, Sep 22, 2026, 05:10 PM
Social·Community
Reddit users project open models to close the 12-point gap to Opus 5.5's 58 Artificial Analysis score in 4–6 months
A Reddit discussion notes Claude Opus 5.5 scoring 58 on Artificial Analysis, 12 points above the best open model, mimo 2.6 pro. Commenters extrapolate open models' recent pace (44 to 46 in two months) and estimate 4-6 months until an open model reaches 58.
A Reddit discussion notes Claude Opus 5.5 scoring 58 on Artificial Analysis, 12 points above the best open model, mimo 2.6 pro. Commenters extrapolate open models' recent pace (44 to 46 in two months) and estimate 4-6 months until an open model reaches 58.
825 engagement2 sourcesredditTue, Sep 22, 2026, 06:26 PM
Developments·Benchmark
Opus 5.5 external benchmarks: tops Artificial Analysis index, third on Endor security after memorization discount
Artificial Analysis and Endor Labs published independent evaluations of Claude Opus 5.5. Opus 5.5 tops Artificial Analysis' Intelligence Index at 58, above GPT-6 Astra and Fable 5.1 at 53, but per-task costs and Endor's security tests favor competitors, with memorization of known fixes inflating Opus's results.
Artificial Analysis and Endor Labs published independent evaluations of Claude Opus 5.5. Opus 5.5 tops Artificial Analysis' Intelligence Index at 58, above GPT-6 Astra and Fable 5.1 at 53, but per-task costs and Endor's security tests favor competitors, with memorization of known fixes inflating Opus's results.
4 engagement1 sourceredditSat, Sep 26, 2026, 02:15 PM
Social·Community
Claude Opus 5.5 Max leads on ClockBench — reported October 2026
Reddit post claims Claude Opus 5.5 Max leads ClockBench as of October 2026
Reddit post claims Claude Opus 5.5 Max leads ClockBench as of October 2026
18 engagement1 sourceredditThu, Oct 8, 2026, 10:06 PM