Models & Stacks
GPT-6 Release Guide
What changed with the GPT-6 release and how to fold it into your existing AI stack.
Published April 2026
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As of April 11, 2026, GPT-6 has not launched. OpenAI's latest release is GPT-5.4 mini, and the model codenamed Spud completed pretraining on March 24 and is in safety evaluation. This guide separates what is confirmed from what is rumour, and what it means for Claude Code users.
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