Model Tracker

o4-mini

o4-mini is an AI model made by OpenAI. OpenAI released it on 16 April 2025. It is deprecated. It takes text, image and returns text.

OpenAI

o4-mini is an AI model made by OpenAI. OpenAI released it on 16 April 2025. It is deprecated. It takes text, image and returns text. Its context window is 200,000 tokens. Its longest answer is 100,000 tokens. Through the API it costs $1.10 per 1M tokens for input and $4.40 per 1M tokens for output. Its knowledge cutoff is 1 June 2024.

Released: 16 April 2025 — openai.com, read 16 October 2026
Status: Deprecated — developers.openai.com, read 16 October 2026
Takes: Text, Image — developers.openai.com, read 16 October 2026
Returns: Text — developers.openai.com, read 16 October 2026
Open weights: Not confirmed: The maker's pages reviewed do not state whether o4-mini's weights are open.
Licence: Not confirmed: The maker's pages reviewed do not name a licence for o4-mini.
Context window: 200,000 tokens — developers.openai.com, read 16 October 2026
Longest answer: 100,000 tokens — developers.openai.com, read 16 October 2026
Knowledge cutoff: 1 June 2024 — developers.openai.com, read 16 October 2026
API price, input: $1.10 per 1M tokens — developers.openai.com, read 19 October 2026
API price, output: $4.40 per 1M tokens — developers.openai.com, read 19 October 2026
Where: API — openai.com, read 16 October 2026
Parameters: Not confirmed: The maker's pages reviewed do not publish a parameter count for o4-mini.
Model card: https://openai.com/index/o3-o4-mini-system-card/ — openai.com, read 16 October 2026

Benchmarks

Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.

Arena

Text Arena, o4-mini-2025-04-16: 1,391 (1,387–1,395, 44,855 votes), published 15 October 2026
Vision Arena, o4-mini-2025-04-16: 1,201 (1,194–1,208, 41,341 votes), published 9 October 2026

Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0

Epoch AI

Epoch Capabilities Index, o4-mini: 145.6 (143.3–147.3), as of 19 October 2026
GPQA Diamond, o4-mini-2025-04-16_high: 79.6% (± 2.4), run 16 April 2025
GPQA Diamond, o4-mini-2025-04-16_medium: 77.8% (± 3.0), run 7 August 2026
GPQA Diamond, o4-mini-2025-04-16_low: 75.3% (± 3.1), run 11 July 2026
FrontierMath, tiers 1–3, o4-mini-2025-04-16_high: 36.1% (± 2.9), run 11 June 2026
FrontierMath, tiers 1–3, o4-mini-2025-04-16_medium: 28.8% (± 2.7), run 27 August 2026
FrontierMath, tiers 1–3, o4-mini-2025-04-16_low: 16.1% (± 2.2), run 27 August 2026
FrontierMath, tier 4, o4-mini-2025-04-16_high: 4.9% (± 3.4), run 11 June 2026
OTIS Mock AIME 2024–2025, o4-mini-2025-04-16_high: 81.7% (± 4.7), run 16 April 2025
OTIS Mock AIME 2024–2025, o4-mini-2025-04-16_medium: 73.3% (± 6.7), run 7 August 2026
OTIS Mock AIME 2024–2025, o4-mini-2025-04-16_low: 57.8% (± 7.4), run 13 July 2026
SimpleQA Verified, o4-mini-2025-04-16_low: 19.6% (± 1.3), run 27 August 2026
SimpleQA Verified, o4-mini-2025-04-16_high: 18.8% (± 1.2), run 27 August 2026

Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0

Questions

When was o4-mini released?

OpenAI released o4-mini on 16 April 2025.

Is o4-mini still available?

It is deprecated: OpenAI has announced the date it will retire it.

What is the context window of o4-mini?

The context window of o4-mini is 200,000 tokens, as OpenAI prints it.

How much does the o4-mini API cost?

On the standard tier, o4-mini costs $1.10 per 1M tokens for input and $4.40 per 1M tokens for output, as OpenAI lists it.

What does o4-mini take and return?

o4-mini takes text, image and returns text.

What is the knowledge cutoff of o4-mini?

The knowledge cutoff of o4-mini is 1 June 2024.

Sources

Introducing OpenAI o3 and o4-mini (read 16 October 2026)
o4-mini Model (read 16 October 2026)
Deprecations (read 16 October 2026)
OpenAI o3 and o4-mini System Card (read 16 October 2026)
o4-mini Model | OpenAI API (read 19 October 2026)
o4-mini Model | OpenAI API (read 19 October 2026)

All of the Model Tracker