AI Model Release Tracker

o1

Released

o1 is an AI model released by OpenAI on Thursday, Dec 5 2024, 84 days after o1-mini. It has a 200k token context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.. Benchmark results (shown below) cover GPQA Diamond.

API pricing

InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
$15.00
Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
$7.50
OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
$60.00
  • Reasoning or thinking is supported.
USD per 1M tokensEvery price here is for one million tokens. A token is roughly three-quarters of a word, so a million tokens is about 750,000 words of text.Verified October 19, 2026Read from developers.openai.com. Click the check to open the source.

Available from

OpenAI$15.00$60.00200K
USD per 1M tokensEvery price here is for one million tokens. A token is roughly three-quarters of a word, so a million tokens is about 750,000 words of text.Checked October 19, 2026Third-party rates from openrouter.ai, not the lab’s own list price.

Benchmarks

GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better.
75.7%
#44 of 66

Compare o1 with

o1

Suggested comparisons

o1vsGPT-6.1 Solo1vsClaude Haiku 5.5o1vsGemini 4 Argono1vsMuse Spark Openo1vsGrok 4.7o1vsDeepSeek-V4.1-Flash-1017o1vsMistral Large 4o1vsKimi K3o1vsGLM-5.3-Flasho1vsQwen3.8-Max-0902o1vsNemotron 3.5 Super VL

About

OpenAI introduced the full o1 model in ChatGPT on December 5, 2024, following September's o1-preview. The release continued the reasoning-model approach of spending additional computation before producing an answer. OpenAI positioned it for difficult mathematics, science and programming tasks and introduced a separate pro mode that used more computation for demanding requests.

The December 5 announcement was tied to ChatGPT Pro and paid ChatGPT access. Developer API availability followed separately, so the date should not be read as a simultaneous release in every interface. OpenAI evaluated pro mode using a stricter four-out-of-four reliability measure in addition to ordinary benchmark accuracy, distinguishing consistency across attempts from success on a single answer.

Frequently asked questions

o1 was released by OpenAI on Thursday, Dec 5 2024.

All OpenAI releases

47 tracked

2022

1 release
GPT-3.5
Nov 30 2022