Scoop: OpenAI preps GPT-6 Sol and Luna launch as Anthropic nears Opus 5.5
daniel_mac8 · x · 2026-09-21
- A leak claims OpenAI is in final preparations to launch GPT-6 Sol and Luna, with the Terra tier being discontinued.
- Anthropic is reportedly working on a version bump spanning Fable, Opus, and Sonnet 5.5; Opus 5.5 is said to ship imminently at discounted pricing, while Haiku may go the way of Terra.
- OpenAI continues an RL run on Astra for 6.1; internal debate persists over releasing "Bel," a larger post-"Doug" pretrain, with the author's read being they'll only ship it when forced by safety concerns and capacity limits.
- Insiders are confident enough in 6.1 to believe it can trade blows with Anthropic's Fable 5.5. All unverified.
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