GPT-5.6 Series Officially Launched

reach_vb · x · 2026-07-10

Official announcement confirms that GPT-5.6 Sol, Terra, and Luna are now available to all users. The release claims the models are better suited for continuous autonomous work on the most difficult tasks while offering greater cost efficiency.

The update rolls out simultaneously across Chat, Codex, and the API.

Related event: OpenAI Launches GPT-5.6 Series: Multi-Agent and Cost-Efficiency(119 posts)→

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