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OpenAI retires legacy Codex API aliases July 23
OpenAI confirmed that gpt-5-codex, o3-deep-research, computer-use-preview, and 11 additional legacy model aliases will stop accepting requests on July 23, 2026.
The July 23 sunset is the first in a two-wave sequence: an October wave covers GPT-4 and o1-lineage models, giving teams on older endpoints a harder deadline. For a step-by-step audit process and structural changes that reduce exposure to future deprecation waves, see model deprecation waves and your toolchain.
sources 2 cited
1 therouter.ai OpenAI legacy model deprecation wave July-October 2026 2 developers.openai.com OpenAI API deprecations