GPT-5.1
2025 large language model
From Wikipedia, the free encyclopedia
GPT-5.1 is a family of five large language models within OpenAI's GPT series. Three were released on November 12, 2025;[1] two more were released one week later on November 19.
| GPT-5.1 | |
|---|---|
| |
| Developer | OpenAI |
| Initial release | November 12, 2025 |
| Included with | |
| Predecessor | GPT-5 |
| Successor | GPT-5.2 |
| Type | |
| License | Proprietary |
| Website | openai |
Features
Models
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] GPT-5.1-Codex-Mini was released on the same day as a cost-effective alternative for coding and agentic tasks.
On November 19, 2025, OpenAI released GPT‑5.1-Codex-Max, an agentic coding model.[6] GPT-5.1 Pro was also released on the same day, replacing GPT-5 Pro.[7]
Reception
Critical reviews
Amanda Caswell from Tom's Guide praised GPT-5.1 for its mathematical reasoning and coding abilities, but decided that Gemini 3 produced better results overall.[8]
Writing for TechRadar, Eric Hal Schwartz compared GPT-5.1 to GPT-5 and found the new model to be more consistent in following prompts. He also considered it an "incremental improvement".[9]