GPT-5.1
language modelOpenAI
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
Key facts
| Made by | OpenAI |
|---|---|
| Type | language model |
| Released | November 13, 2025 |
| Reads at once | 400,000 tokens |
| Price (API, per million tokens) | $1.25 in · $10 out |
| Input → output | image, text, file → text |
Questions about GPT-5.1
Who makes GPT-5.1?
GPT-5.1 is made by OpenAI.
When was GPT-5.1 released?
We first saw GPT-5.1 listed on November 13, 2025.
How much does GPT-5.1 cost?
Through OpenRouter it costs $1.25 per million input tokens and $10 per million output tokens. Prices change, so check the provider before you build on it.
How much text can GPT-5.1 read at once?
Up to 400,000 tokens, roughly 300K words.
More from OpenAI
Whisper-SmallOpenAI · voice and audio model
Sep 26, 2022released
Whisper-Large-V3OpenAI · voice and audio model
Nov 7, 2023released
whisperOpenAI · voice and audio model
Sep 26, 2022released
Whisper-TinyOpenAI · voice and audio model
Sep 26, 2022released
Openai-Agents-Pythonopenai · developer tool
Mar 11, 2025released
Whisper-MediumOpenAI · voice and audio model
Sep 26, 2022released
Other language models
gpt2Openai Community · language model
Mar 2, 2022released
Qwen3.8Alibaba (Qwen) · language model
Aug 5, 2026released
Qwen3 VLAlibaba (Qwen) · language model
Sep 23, 2025released
Qwen2.5 VLAlibaba (Qwen) · language model
Jan 26, 2025released
optMeta · language model
May 11, 2022released
Qwen3.6Alibaba (Qwen) · language model
Apr 15, 2026released
Ollamaollama · language model
Jun 26, 2023released
pythiaEleutherAI · language model
Feb 8, 2023released
Modelcast collects this page automatically from public sources (OpenRouter). Facts are copied from those sources, not written by the maker. Not affiliated with OpenAI.