LaunchAI ModelsSeptember 22, 2026

Claude Opus 5.5 and GPT-6 Sol/Luna ship on the same day

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Anthropic's Opus 5.5 and OpenAI's GPT-6 Sol and Luna landed together, with Artificial Analysis reporting eleven new points on the Intelligence Index vs Cost per Task Pareto frontier. Opus 5.5 wins every benchmark in one head-to-head table, though Sol trails by about 100 Elo on GDPval.

How this story unfolded

2 days · 2 reports · 8 community posts · 10 of 12 shown

  1. Sep 21
  2. Sep 22
  3. Sep 23

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