OpenAI releases GPT-6 Sol and Luna as Anthropic launches Claude Opus 5.5
Original titleOpenAI released GPT-6 Sol and Luna and Anthropic released Claude Opus 5.5 on the same day, here is my week 39 recap
AISummary
OpenAI released GPT-6 Sol and Luna, priced 50 percent below GPT-5.6 promo API pricing, and rolling out in ChatGPT Work, Codex and the API, not yet in regular Chat. Anthropic released Claude Opus 5.5, described as roughly Claude Fable 5.1 level for 40 percent less than Opus 5 and over 30 percent faster, with Sonnet 5.5 and Haiku 5.5 due in coming weeks.
AIWhy it matters
The recap puts OpenAI and Anthropic releases side by side, with pricing and capability claims that help compare the two launches.
Source: Tibor Blaho · x.comPublished · added here