On Wednesday, OpenAI launched GPT-5.1 On the spot and GPT-5.1 Pondering, two up to date variations of its flagship AI fashions now obtainable in ChatGPT. The corporate is wrapping the fashions within the language of anthropomorphism, claiming that they’re hotter, extra conversational, and higher at following directions.
The discharge follows complaints earlier this yr that its earlier fashions had been excessively cheerful and sycophantic, together with an opposing controversy amongst customers over how OpenAI modified the default GPT-5 output type after a number of suicide lawsuits.
The corporate now faces intense scrutiny from attorneys and regulators that might threaten its future operations. In that sort of setting, it’s troublesome to simply launch a brand new AI mannequin, throw out a number of stats, and transfer on like the corporate may even a yr in the past. However listed below are the fundamentals: The brand new GPT-5.1 On the spot mannequin will function ChatGPT’s sooner default choice for many duties, whereas GPT-5.1 Pondering is a simulated reasoning mannequin that makes an attempt to deal with extra advanced problem-solving duties.
OpenAI claims that each fashions carry out higher on technical benchmarks reminiscent of math and coding evaluations (together with AIME 2025 and Codeforces) than GPT-5, which was launched in August.
Improved benchmarks could win over some customers, however the largest change with GPT-5.1 is in its presentation. OpenAI says it heard from customers that they needed AI fashions to simulate totally different communication types relying on the duty, so the corporate is providing eight preset choices, together with Skilled, Pleasant, Candid, Quirky, Environment friendly, Cynical, and Nerdy, alongside a Default setting.
These presets alter the directions fed into every immediate to simulate totally different character types, however the underlying mannequin capabilities stay the identical throughout all settings.
As well as, the corporate skilled GPT-5.1 On the spot to make use of “adaptive reasoning,” which means that the mannequin decides when to spend extra computational time processing a immediate earlier than producing output.
The corporate plans to roll out the fashions regularly over the following few days, beginning with paid subscribers earlier than increasing to free customers. OpenAI plans to carry each GPT-5.1 On the spot and GPT-5.1 Pondering to its API later this week. GPT-5.1 On the spot will seem as gpt-5.1-chat-latest, and GPT-5.1 Pondering can be launched as GPT-5.1 within the API, each with adaptive reasoning enabled. The older GPT-5 fashions will stay obtainable in ChatGPT underneath the legacy fashions dropdown for paid subscribers for 3 months.
