# OpenAI o3-mini

OpenAI o3-mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 200,000 tokens. The advertised input rate is $1.10 per million input tokens. The advertised output rate is $4.40 per million output tokens.

- Model identifier: ` openai/o3-mini `
- Creator: OpenAI
- Model type: Text generation
- Canonical model page: [OpenAI o3-mini](<https://impossibl.com/openai/o3-mini>)
- API availability: Listed as serving through Impossibl.
- Creator release date: 2025-01-31

## Capabilities and limits

- Context window: 200,000 tokens
- Maximum output tokens: Not published in the public catalog; this is separate from the context window.
- Inputs: text
- Outputs: text
- Tool calling: Not published

## API access

Use ` openai/o3-mini ` as the model identifier through the Impossibl API.

Published API endpoints:

- ` /v1/chat/completions `

[API quickstart](<https://impossibl.com/docs/agent-quickstart>) · [Models and billing documentation](<https://impossibl.com/docs/models>)

## Published API prices

All rates are in USD. An unpublished rate is unknown, not zero. Workspace-specific pricing, taxes, balance-purchase fees, billing adjustments, and tool charges can affect the amount paid.

| Usage | Published base rate | Billing unit |
| --- | --- | --- |
| Input | $1.10 | per million input tokens |
| Output | $4.40 | per million output tokens |
| Cache read | $0.55 | per million cached input tokens |
| Cache write (default retention) | Not published | per million tokens |
| Cache write (one-hour retention) | Not published | per million tokens |
| Audio input | Not published | per million audio input tokens |

## Independent benchmarks

Source: [Artificial Analysis](<https://artificialanalysis.ai/>). Last checked: 2026-09-11T10:50:14.034Z.
Configurations are evaluated separately. API scores retain their original units. Unmeasured scores are omitted.

### o3-mini

Source: [Evaluation source](<https://artificialanalysis.ai/models/o3-mini>)

| Benchmark | Score |
| --- | --- |
| Intelligence Index | 12.47 |
| GPQA | 74.85% |
| Humanity’s Last Exam | 7.91% |
| Terminal-Bench Hard | 6.82% |
| Tau2 | 28.65% |
| LiveCodeBench | 71.75% |
| intelligence index (API) | 12.5 |

### o3-mini (high)

Source: [Evaluation source](<https://artificialanalysis.ai/models/o3-mini-high>)

| Benchmark | Score |
| --- | --- |
| Intelligence Index | 10.96 |
| Omniscience Index | -42.57 |
| GPQA | 77.27% |
| Humanity’s Last Exam | 12.04% |
| SciCode | 42.82% |
| CritPt | 0.29% |
| Terminal-Bench v2.1 | 4.49% |
| Terminal-Bench v4.0 | 0.00% |
| Terminal-Bench Hard | 6.06% |
| AA-LCR | 43.00% |
| GDPval Elo | 420.79 |
| GDP.pdf All-pass | 2.00% |
| AutomationBench Partial | 0.53% |
| IFBench | 67.14% |
| Tau2 | 31.29% |
| Tau Banking | 5.15% |
| LiveCodeBench | 73.44% |
| coding index (API) | 16.3 |
| agentic index (API) | 0.9 |
| intelligence index (API) | 11 |

Full benchmark data and breakdowns: [Complete benchmark snapshot](<https://api.impossibl.com/v1/models/openai/o3-mini/benchmarks>).


## Availability and retirement

The model is listed as serving. No retirement is announced in the current public catalog.

## Frequently asked questions

### What is OpenAI o3-mini?

OpenAI o3-mini is a text-generation model from OpenAI, available through the Impossibl API.

### How much does OpenAI o3-mini cost?

OpenAI o3-mini costs $1.10 per million input tokens and $4.40 per million output tokens through the Impossibl API. Cache reads cost $0.55 per million tokens. All rates are in USD.

### What is the context length of OpenAI o3-mini?

OpenAI o3-mini has a 200,000-token context window through the Impossibl API.

### What inputs and outputs does OpenAI o3-mini support?

OpenAI o3-mini accepts text as input. OpenAI o3-mini returns text.

### How do I use OpenAI o3-mini through an API?

OpenAI o3-mini is available through the Impossibl API. Use openai/o3-mini as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.

### When was OpenAI o3-mini released?

OpenAI released OpenAI o3-mini on January 31, 2025.

Sources: [Creator release announcement](<https://openai.com/index/openai-o3-mini/>)

## Sources and related links

Prices, limits, capabilities, endpoints, and availability come from the public Impossibl catalog. Creator documentation supplies descriptions and release dates where available; it does not override the published API offering.

- [Public Impossibl model catalog](<https://api.impossibl.com/v1/models>)
- [Full model directory as JSON](<https://impossibl.com/models.json>)
- [OpenAI o3-mini: model details and pricing](<https://impossibl.com/openai/o3-mini>)
- [Model directory](<https://impossibl.com/models>)