Model Tracker
o3-mini
o3-mini is an AI model made by OpenAI. OpenAI released it on 31 January 2025. It is deprecated. It takes text and returns text.
o3-mini is an AI model made by OpenAI. OpenAI released it on 31 January 2025. It is deprecated. It takes text 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 October 2023.
- Released
- 31 January 2025 — openai.com, read 16 October 2026
- Status
- Deprecated — developers.openai.com, read 16 October 2026
- Takes
- Text — developers.openai.com, read 16 October 2026
- Returns
- Text — developers.openai.com, read 16 October 2026
- Open weights
- Not confirmed: The maker's pages consulted do not state whether o3-mini has open weights.
- Licence
- Not confirmed: The maker's pages consulted do not name a licence for o3-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 October 2023 — 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 — developers.openai.com, read 16 October 2026
- Parameters
- Not confirmed: The maker's pages consulted do not publish a parameter count for o3-mini.
- Model card
- Not confirmed: two readings disagree: https://cdn.openai.com/o3-mini-system-card.pdf and https://openai.com/index/o3-mini-system-card/
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, o3-mini-high: 1,364 (1,358–1,369, 18,589 votes), published 15 October 2026
- Text Arena, o3-mini: 1,348 (1,345–1,352, 56,741 votes), published 15 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, o3-mini: 140.3 (137.2–141.9), as of 19 October 2026
- GPQA Diamond, o3-mini-2025-01-31_high: 77.0% (± 2.6), run 13 February 2025
- GPQA Diamond, o3-mini-2025-01-31_medium: 74.3% (± 2.5), run 31 January 2025
- GPQA Diamond, o3-mini-2025-01-31_low: 68.2% (± 3.3), run 20 July 2026
- FrontierMath, tiers 1–3, o3-mini-2025-01-31_high: 18.6% (± 2.3), run 11 June 2026
- FrontierMath, tiers 1–3, o3-mini-2025-01-31_medium: 10.5% (± 1.8), run 27 August 2026
- FrontierMath, tiers 1–3, o3-mini-2025-01-31_low: 3.9% (± 1.1), run 27 August 2026
- FrontierMath, tier 4, o3-mini-2025-01-31_high: 0.0% (± 0.0), run 11 June 2026
- OTIS Mock AIME 2024–2025, o3-mini-2025-01-31_high: 76.9% (± 5.2), run 27 February 2025
- OTIS Mock AIME 2024–2025, o3-mini-2025-01-31_medium: 63.9% (± 6.0), run 25 February 2025
- OTIS Mock AIME 2024–2025, o3-mini-2025-01-31_low: 44.4% (± 7.5), run 20 July 2026
- SimpleQA Verified, o3-mini-2025-01-31_high: 15.3% (± 1.1), run 31 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 o3-mini released?
OpenAI released o3-mini on 31 January 2025.
Is o3-mini still available?
It is deprecated: OpenAI has announced the date it will retire it.
What is the context window of o3-mini?
The context window of o3-mini is 200,000 tokens, as OpenAI prints it.
How much does the o3-mini API cost?
On the standard tier, o3-mini costs $1.10 per 1M tokens for input and $4.40 per 1M tokens for output, as OpenAI lists it.
What does o3-mini take and return?
o3-mini takes text and returns text.
What is the knowledge cutoff of o3-mini?
The knowledge cutoff of o3-mini is 1 October 2023.
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Sources
- o3-mini Model | OpenAI API (read 16 October 2026)
- OpenAI o3-mini (read 16 October 2026)
- Deprecations | OpenAI API (read 16 October 2026)
- Pricing | OpenAI API (read 16 October 2026)
- OpenAI o3-mini System Card (read 16 October 2026)
- o3-mini Model | OpenAI API (read 19 October 2026)
- o3-mini Model | OpenAI API (read 19 October 2026)