OpenAI launches GPT-5.2, boosting AI capabilities for coding, spreadsheets, long-context reasoning and tools use in professional workflows.

GPT-5.2 features a massive 400,000-token context window — allowing it to ingest hundreds of documents or large code repositories at once — and a 128,000 max output token limit, enabling it to generate ...

OpenAI is bringing o1, its “reasoning” AI model, to its API — but only for certain developers, to start. Starting Tuesday, o1 will begin rolling out to devs in OpenAI’s “tier 5” usage category, the ...

OpenAI says that it won’t bring the AI model powering deep research, its in-depth research tool, to its developer API while it figures out how to better assess the risks of AI convincing people to act ...

Codex, introducing "context compaction" for long tasks and raising API prices by 40% to target enterprise engineering.