model update

OpenAI is releasing a third behavioral update to GPT-5.5 Instant, its most-used ChatGPT model. The company claims the update makes the model better at understanding question intent and handling complex constraints, with improved shopping and local recommendations.

OpenAI released GPT-5.5, which completes tasks at the same difficulty level faster than GPT-5.4 while using significantly fewer tokens. The model is available to ChatGPT Plus, Pro, Business, and Enterprise users, with API access delayed due to required safeguards.