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Claude Opus 5.5
Launched Sept 22, 2026, Claude Opus 5.5 leads Arena WebDev (1818), image-to-WebDev (1750), Terminal-Bench 4.1 (65.8%), Mercor APEX-SWE (67.6%), and GDPval-AA v2.1 (1866), alongside #2 on Humanity's Last Exam (61.4%). It sits 2.6 BenchAlign points behind #2 Gemini 4 Carbon, but outscores #4 GPT-6 Astra by 2.2 points on Intelligence Index v5 at less than half Astra's $10/$50 price. Key 2026 benchmarks — Developer: Anthropic; Intelligence Index v5: 59.1 (#3); BenchAlign v5.8: 86.6 (#3); API Pricing (1M): $4 in / $20 out; Context Window: 1M tokens.
Peak Community Rank
#3
Active Rankings
1
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Rankings Featuring Claude Opus 5.5
Verified Entity DossierRanked #3 in Claude Fable 5.2 vs. Gemini 4 Carbon? Top 10 Frontier AI Models Ranked (2026)
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Should Claude Opus 5.5 rank Top 3 in Claude Fable 5.2 vs. Gemini 4 Carbon? Top 10 Frontier AI Models Ranked?
Ranked #3 on "Claude Fable 5.2 vs. Gemini 4 Carbon? Top 10 Frontier AI Models Ranked (2026)". Cast your vote to back or challenge this spot.
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