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GPT-5.1

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GPT-5.1
DeveloperOpenAI
Initial releaseNovember 12, 2025; 5 days ago (2025-11-12)
Included with
PredecessorGPT-5
Type
LicenseProprietary
Websiteopenai.com/index/gpt-5-1/

GPT-5.1 is a large language model within OpenAI's GPT series, released on November 12, 2025.[1]

The model offers 8 personality options.[2][3] Improvements over its predecessor GPT-5 include less hallucinations and better adherance to prompts.[3] According to OpenAI, it is faster and has a "warmer personality" by default compared to GPT-5.[1][4]

The model consists of two modes: GPT-5.1 Instant and GPT-5.1 Thinking, the latter being a reasoning model designed for more complex tasks.[5]

References

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  1. ^ a b "OpenAI says the brand-new GPT-5.1 is 'warmer' and has more 'personality' options". The Verge. November 13, 2025.
  2. ^ Hughes, Alex (November 13, 2025). "ChatGPT-5.1 offers 8 different personalities to choose from — here's how to use them". Tom's Guide. Retrieved November 13, 2025.
  3. ^ a b Mannan, Jasmine (November 13, 2025). "I love Gemini, but the GPT 5.1 update could make ChatGPT the AI bot you want to use". Digital Trends. Retrieved November 13, 2025.
  4. ^ "OpenAI's GPT-5.1 makes ChatGPT 'warmer' and smarter - how its upgraded modes work now". ZDNET. Retrieved November 13, 2025.
  5. ^ Edwards, Benj (November 12, 2025). "OpenAI walks a tricky tightrope with GPT-5.1's eight new personalities". Ars Technica. Retrieved November 14, 2025.
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