GPT-5.3 Chat deprecated, retires 2026-08-10

Microsoft has deprecated its GPT-5.3 Chat model, which will retire on 2026-08-10, according to a provider announcement on models.dev. The model, released on 2026-03-03, supports text and image inputs with a 128k context window and 16k max output. Developers using the model are advised to check for alternatives before the retirement date.

MF✕ Retired GPT-5.3 Chat Microsoft · gpt-5.3-chat Released2026-03-03 Retires2026-08-1020d ago gpt-codextext+image128k context16k max out also matches: gpt-5.3-chat microsoft/gpt-5.3-chat provider announcement → https://models.dev/azure/gpt-5.3-chat Does your code call GPT-5.3 Chat? $ curl -fsSL https://llmstatus.ai/install.sh | bash Then mm status in any repo — it finds every model you use and flags the ones on a clock. No account, nothing uploaded. Get alerted before it retires → /sign-up