GPT-5.5 Instant

Every AIbrief event involving GPT-5.5 Instant, in order.

1. May 5, 2026 · Models · 1 source

   OpenAI releases GPT-5.5 Instant as the new default model for ChatGPT

   OpenAI has released GPT-5.5 Instant and made it the new default model for ChatGPT, according to TechCrunch. The company says the model keeps the low latency of its predecessor while reducing hallucinations in sensitive domains including law, medicine, and finance.