OpenAI: o3-mini-high
o3-mini-high is a reasoning model from OpenAI released on Jan 1, 2024. It reads text and images and writes text, with a 200K token context window and up to 100K tokens per reply.
Show moreShow less
It costs $1.10 per million input tokens and $4.40 per million output tokens. Cached input bills at $0.55, 50% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
3 providers serve it, including Poe, Kilo Gateway and NanoGPT. The lowest input price is $0.99 per million tokens at Poe.
- Modalities
- In / out price
- $1.10 / $4.40 per 1M
- Context
- 200K
- Max output
- 100K
- Released
- Jan 1, 2024
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
o3-mini-high pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $1.10 / 1M tokens | |
|---|---|---|
| Output | $4.40 / 1M tokens | |
| Cached input (read) | $0.55 / 1M tokens | 50% off input |
o3-mini-high providers
3 providers serve it, including Poe, Kilo Gateway and NanoGPT. The lowest input price is $0.99 per million tokens at Poe. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Poe | $0.99 | $4 | – | 200K | 100K |
| Kilo Gateway | $1.10 | $4.40 | $0.55 | 200K | 100K |
| NanoGPT | $1.10 | $4.40 | $0.55 | 200K | 100K |
What o3-mini-high costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call o3-mini-high through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning
Alternatives to o3-mini-high
Models that take the same inputs and call tools, closest in price, cheaper ones first.
- 1M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 29 providers.
by x-aiApr 17, 2026$1.25/M input tokens$2.50/M output tokens29 providers
- 1M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 10 providers.
by x-aiMar 9, 2026$1.25/M input tokens$2.50/M output tokens10 providers
- Index 40.9
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 24 providers.
by googleSep 2, 20261.05M context$0.75/M input tokens$3.75/M output tokens24 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 25 providers.
by googleJul 9, 2026$0.75/M input tokens$3.75/M output tokens25 providers
- 256K context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 18 providers.
by x-aiApr 16, 2026$1/M input tokens$2/M output tokens18 providers
- 256K context
Reads text, images and video. Tool calling, structured output, reasoning. Served by 2 providers.
by bytedance-seedJun 23, 2026$0.8906/M input tokens$4.45/M output tokens2 providers
More from OpenAI
- Index 51.8
Reads text, images and files. Tool calling, structured output, reasoning. Served by 27 providers.
by openaiSep 29, 20261.05M context$2/M input tokens$10/M output tokens27 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 2 providers.
by openaiSep 29, 2026$2/M input tokens$10/M output tokens2 providers
- Index 38.1
Reads text, images and files. Tool calling, structured output, reasoning. Served by 27 providers.
by openaiSep 22, 20261.05M context$0.10/M input tokens$0.50/M output tokens27 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 2 providers.
by openaiSep 22, 2026$0.10/M input tokens$0.50/M output tokens2 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 27 providers.
by openaiSep 22, 2026$2/M input tokens$10/M output tokens27 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 2 providers.
by openaiSep 22, 2026$2/M input tokens$10/M output tokens2 providers
o3-mini-high questions
How much does the o3-mini-high API cost?
$1.10 per million input tokens and $4.40 per million output tokens, with cached input at $0.55. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of o3-mini-high?
200,000 tokens of input, and it can write up to 100,000 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve o3-mini-high?
3 providers serve it, including Poe, Kilo Gateway and NanoGPT. The lowest input price is $0.99 per million tokens at Poe. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does o3-mini-high support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is o3-mini-high open source?
No. OpenAI serves it through an API only, so you cannot download the weights or host it yourself.
When was o3-mini-high released?
Jan 1, 2024.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on o3-mini-high?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
Book Meeting