
Back in August, OpenAI unveiled GPT-5, a major frontier model update to ChatGPT. Three months later, OpenAI is back with GPT-5.1, which it says is “now warmer, more intelligent, and better at following your instructions.”
Instant and Thinking improvements
According to OpenAI, GPT-5.1 focuses on both communication style and intelligence. The company summarizes improvements to both the instant model and thinking model:
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GPT‑5.1 Instant: our most-used model, now warmer,…
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