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What's happening in robotics and AI — curated by the wujec.ai editors.
o3 disappears from ChatGPT on Wednesday — and keeps selling in the API for another 107 days
On 26 August 2026 OpenAI o3 stops being selectable in ChatGPT. The date was set on 28 May, when OpenAI gave the model a 90-day sunset alongside GPT-4.5, which went on 27 June. Both were paid-tier-only options hidden behind model settings by then. The same announcement contains the sentence that most coverage drops: "These changes apply to ChatGPT only; there are no changes to the API." In the API, o3 is scheduled to shut down on 11 December 2026, together with o3-pro and the whole first generation of GPT-5 — gpt-5, gpt-5-mini, gpt-5-nano and gpt-5-pro. Every one of them is pointed at gpt-5.6-sol. That is 107 days between the two deaths of the same model. The gap can be much wider. GPT-4o was removed from ChatGPT on 13 February 2026 and is still on sale in the API today at $2.50 per million input tokens, with no shutdown date announced at all. Only its oldest snapshot, gpt-4o-2024-05-13, is scheduled to go, on 23 October — and the model's default snapshot has been gpt-4o-2024-08-06 for two years. A model can be gone from the product the public knows and still be a supported production endpoint six months later. That is why the autumn calendar reads differently depending on which side you are on. For consumers, the visible loss is o3 on Wednesday. For anyone shipping software, the dates that matter are 23 October — when gpt-3.5-turbo, gpt-4, gpt-4 Turbo, o1, o1-pro, o3-mini, o4-mini and gpt-image-1 go for good — then 1 December for the older image models, 11 December for o3 and the GPT-5 family, and 20 January 2027 for the legacy audio and realtime line. OpenAI now publishes the notice periods behind those dates: at least six months for generally available models, at least three for specialised variants such as chat or Codex builds, and as little as two weeks for anything with "preview" in its name. It is a commitment about warning time, not about lifespan — and the ChatGPT calendar it does not cover has been the faster of the two all year.
OpenAI o3 →The original GPT-5 gets a death date: OpenAI shuts down the August 2025 snapshot on 11 December
OpenAI's deprecation page now carries a line that would have been hard to imagine a year ago: gpt-5-2025-08-07, the snapshot that launched GPT-5, will be shut off on 11 December 2026. The reasoning model o3-2025-04-16 goes the same day. Both point to a single recommended replacement, gpt-5.6-sol. The original GPT-5 will therefore have lived about sixteen months in the API. That is not unusual by current standards, but it is a striking number for a model that was treated as a generational landmark on release, and it says something about how fast the naming has moved: five point-releases have shipped in the time GPT-4 spent as the default. A nearer deadline is already in force. The aliases gpt-5.2-chat-latest and gpt-5.3-chat-latest stop responding on 10 August 2026, four days from now, also redirecting developers to gpt-5.6-sol. Anyone still calling the -chat-latest names has effectively no migration window left. The rest of the autumn calendar is dense. The Assistants API is removed on 26 August, a year after its replacement by the Responses and Conversations APIs was announced. Sora 2, sora-2-pro and the Videos API end on 24 September with no recommended successor at all — the only entry on the list where OpenAI does not name a replacement. The legacy realtime and audio families survive until 20 January 2027. The consumer side has its own, earlier deadline, announced on 28 May 2026: o3 disappears from ChatGPT on 26 August, at the end of a 90-day sunset, and takes GPT-4.5 with it. That removes the last GPT-4-family model from the product, after GPT-4o and the GPT-4.1 variants were withdrawn in February 2026. The API is unaffected by that change — o3 keeps answering there until December — so for a few months the same model will be alive for developers and gone for everyone else. For a catalogue like this one the pattern matters more than any single date: a frontier model is now a product with a service life measured in months, and the profile of a model increasingly needs to record when it stops answering, not just when it launched.
GPT-5 →