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OpenAI Launches GPT-5.6 Family with Three Variants Across ChatGPT, Codex, and API

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OpenAI introduced the GPT-5.6 model family on July 9, 2026, comprising three named variants — Sol, Terra, and Luna — available across ChatGPT, Codex, and the OpenAI API. The release marks a shift toward a multi-flavor model strategy, giving developers and businesses distinct options rather than a single undifferentiated endpoint. Official materials confirm the lineup and cross-platform availability, but do not specify performance benchmarks, pricing, or recommended workload roles for each variant. OpenAI noted that access will expand as capacity grows, meaning availability should be treated as variable rather than guaranteed at scale for all accounts. Organizations adopting GPT-5.6 are advised to run their own representative tests, document which variant is used per workflow, and plan for staged rollouts with appropriate fallbacks.

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OpenAI Launches GPT-5.6 Family with Three Variants Across ChatGPT, Codex, and API · ShortSingh