> o1-mini is a closed AI model from OpenAI, released 12 Sep 2024. Index score 123 (GPT-4 = 100), rank 134 of 229 ranked models.

[Models](https://themodelindex.org/models/) /[OpenAI](https://themodelindex.org/labs/openai/)

# o1-mini

OpenAI

Released 12 Sep 2024

Closed

Reasoning

Date verified

[Compare](https://themodelindex.org/compare/o1-mini-vs-qwen2-5/) [Announcement](https://openai.com/index/introducing-openai-o1-preview/)

123111–134

Index score

#134 of 229 models

2/ 8

Core tests taken

2 of 6 areas · plus 9 anchor tests

Frontier

Versus the frontier at release

set or matched the record

Replaced by [o3-mini](https://themodelindex.org/models/o3-mini-2025-01/)

–

Price per million tokens

no public API price found

–

Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

Among the first models to reach this score.

## Test results · by area · tick = best by any model

Show 7 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

62%

Humanity's Last Exam

no result

Maths

evidence

FrontierMath T1-3

no result

Coding

evidence

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

no evidence yet

APEX-Agents

no result

Novel problems

evidence

ARC-AGI-2

1%

Long tasks

no evidence yet

METR time horizon

no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

The Model Index

independent tests, our method

#134

of 219 · 123

LMArena · Maths

maths questions in chat

#180

of 373 · 1362

Epoch Capabilities Index

overall capability from many benchmarks

#119

of 239 · 135.8

LMArena · Coding

coding questions in chat

#201

of 383 · 1386

LMArena · Text

overall chat quality, judged by people

#211

of 388 · 1337

LMArena · Creative writing

creative writing

#236

of 386 · 1281

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Replaced by o3-mini; it no longer leads any category among current models.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Where to use it · prices checked 1 Oct 2026

#### From the lab

ChatGPT

app · subscription

↗

OpenAI API

API

↗

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

## Facts and sources

Released

12 Sep 2024

Announcement

[openai.com ↗](https://openai.com/index/introducing-openai-o1-preview/)

Release entry

o1-preview / o1-mini

Scored as

o1-mini

Artificial Analysis index

–

Output speed

–

Hugging Face

closed weights

## OpenAI releases · around this one

GPT-4o

Closed

13 MAY 2024

index 109

GPT-4o mini

Closed

18 JUL 2024

index 105

o1-mini

Closed

12 SEP 2024

index 123

o1-preview

Closed

12 SEP 2024

index 121

o1

Closed

5 DEC 2024

index 136

---
Source: https://themodelindex.org/models/o1-mini/ · The Model Index · data as of 2026-10-01