Overview
- The new model is live now across ChatGPT on web, mobile, and desktop and is available via API as gpt-5.3-chat-latest, with GPT-5.2 Instant retained in legacy mode for paid users until June 3, 2026.
- OpenAI says responses cut back on preachy disclaimers and unnecessary caveats, reducing unwarranted refusals and adopting a more natural conversational tone.
- Web answers are designed to be more useful by balancing retrieved results with the model’s own reasoning, making it less likely to overindex on links.
- Internal evaluations report lower hallucination rates—down 26.8% with web access and 19.7% without—alongside stronger writing performance.
- OpenAI’s system-card results note regressions versus prior instant models on some disallowed-content safety checks, including sexual content and self-harm.