GPT-5.5 Instant 2026: What Changed in ChatGPT
GPT-5.5 Instant is now ChatGPT’s default model. See OpenAI’s 52.5% hallucination reduction claim, API alias chat-latest, memory sources, and what users and developers should do next.
GPT-5.5 Instant is now ChatGPT’s default model. See OpenAI’s 52.5% hallucination reduction claim, API alias chat-latest, memory sources, and what users and developers should do next.