> o4-mini is a closed AI model from OpenAI, released 16 Apr 2025. Index score 143 (GPT-4 = 100), rank 77 of 229 ranked models. API price $1.1 in / $4.4 out per million tokens, 200K context.

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# o4-mini

OpenAI

Released 16 Apr 2025

Closed

Reasoning

Date verified

[Compare](https://themodelindex.org/compare/o4-mini-vs-qwen3/) [Announcement](https://openai.com/index/introducing-o3-and-o4-mini/)

143132–155

Index score

#77 of 229 models

5/ 8

Core tests taken

4 of 6 areas · plus 19 anchor tests

−3

Versus the frontier at release

best then: o3

$1.1/ $4.4

Price per million tokens

input / output, list price

200K

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 15 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

80%

Humanity's Last Exam

18%

Maths

evidence

FrontierMath T1-3

36%

Coding

evidence

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

evidence

APEX-Agents

no result

Novel problems

evidence

ARC-AGI-2

6%

Long tasks

evidence

METR time horizon

1.3 h

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

#77

of 219 · 143

Epoch Capabilities Index

overall capability from many benchmarks

#76

of 239 · 145.6

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

Not in the top three among current models on any category we track.

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

↗

#### API providers · 1 · per million tokens, in / out

O

OpenAI

$1.1 / $4.4

cheapest

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

16 Apr 2025

Announcement

[openai.com ↗](https://openai.com/index/introducing-o3-and-o4-mini/)

Release entry

o3 + o4-mini

Scored as

o4-mini

Artificial Analysis index

–

Output speed

–

Hugging Face

closed weights

## OpenAI releases · around this one

GPT-4.1

Closed

14 APR 2025

index 125

o3

Closed

16 APR 2025

index 147

o4-mini

Closed

16 APR 2025

index 143

codex-1

Closed

16 MAY 2025

gpt-oss-120b

Open

5 AUG 2025

index 131

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Source: https://themodelindex.org/models/o4-mini/ · The Model Index · data as of 2026-10-01