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Opus 5.5 vs GPT-6 Sol and Luna

This story is from 2026-09-23. It is preserved in the archive; the latest stories are on the live feed.

Anthropic and OpenAI release new models on the same day, with Opus 5.5 winning early acclaim while GPT-6 Sol and Luna push the frontier of affordable intelligence. NLW breaks down the benchmarks, real-world use cases, and first reactions—and why model personality, falling costs, and the tools surro…

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Timeline · 2 reports

  1. 2026-09-25 05:48 · ThursdAI
    Opus 5.5 is your new workhorse! OpenAI ships GPT 6 Sol and Luna before DevDay and Meta goes all in on Muse! Your friday read is here
  2. 2026-09-23 20:50 · The AI Daily Brief
    Opus 5.5 vs GPT-6 Sol and Luna

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