OpenAI releases GPT‑5.4 with 1M‑token context
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- OpenAI shipped GPT-5.4, which includes Thinking and Pro variants.
- GPT-5.4 Thinking shows more of its reasoning up front and can accept prompts to change course mid‑reasoning, improving long‑horizon task performance.
- GPT-5.4 expands its context window to 1 million tokens, matching competitors Google and Anthropic.
- GPT-5.4 can analyze images up to 10.24 million pixels (max dimension 6 000 px), boosting visual understanding.
- OpenAI says GPT-5.4 responses are 18 % less likely to contain factual errors.
- Anthropic released its memory feature to free users and added a tool for importing memory, after a surge in sign‑ups following OpenAI’s Pentagon deal and a public feud with the Trump administration.
- OpenAI made GPT-5.4 available on ChatGPT web, native apps, Codex, and the API for Plus, Team, Pro, Edu, and Enterprise subscribers.
Why it matters: OpenAI’s upgraded GPT‑5.4 gives its 900‑million‑plus user base a more capable, cost‑efficient tool for long‑horizon and visual tasks, aiming to stem the recent churn to Anthropic, which is gaining sign‑ups after opening its memory feature to free users, reinforcing OpenAI’s market lead.
