# o3-mini API pricing

o3-mini is an earlier OpenAI model, still sold. It costs $1.10 per million tokens it reads and $4.40 per million it writes, $1.93 on a mix of 3 read for each 1 written. OpenAI's newest models are GPT-6 Astra, GPT-6.1 Sol and GPT-6 Luna. Below are every price OpenAI lists for it, and what 8 everyday jobs cost a month on it.

- Page: https://tecyfy.com/prices/o3-mini
- Maker: OpenAI

## Price per million tokens, in US dollars

| | Price |
| --- | --: |
| Input | $1.10 |
| Cached input | $0.55 |
| Cache write | not listed |
| Output | $4.40 |
| Blend, 3 read for each 1 written | $1.93 |
| Batch input | $0.55 |
| Batch output | $2.20 |
| Context window, tokens | 200K |
| Longest answer, tokens | 100K |
| Capability score (Epoch Capabilities Index; GPT-5 is 150) | 140 |

## What 8 everyday jobs cost a month

Each job at its usual runs a day, for 30 days, at the standard price.

| Job | Tokens in, out, runs a day | A run | A month |
| --- | --- | --: | --: |
| A chat question | 300, 500, 100 | 0.25 cents | $7.59 |
| A hard question, with thinking | 300, 1,400, 100 | 0.65 cents | $19.47 |
| A long report, summarised | 60,000, 2,000, 20 | 7.5 cents | $44.88 |
| A 40-turn agent task | 2,800,000, 40,000, 10 | $1.87 | $561 |
| A support bot's reply | 4,000, 300, 2,000 | 0.46 cents | $277 |
| Sort a message into a category | 250, 5, 50,000 | 0.03 cents | $446 |
| Read an invoice into fields | 1,500, 250, 1,000 | 0.28 cents | $82.50 |
| Review a pull request | 25,000, 4,500, 50 | 4.7 cents | $70.95 |

## Cheaper models that score as well as o3-mini

- [Claude Haiku 5.5](https://tecyfy.com/prices/claude-haiku-5-5.md), Anthropic: $0.20 per million at 3:1, score 159
- [GPT-6 Luna](https://tecyfy.com/prices/gpt-6-luna.md), OpenAI: $0.20 per million at 3:1, score 156
- [DeepSeek V4.1 Flash](https://tecyfy.com/prices/deepseek-flash.md), DeepSeek: $0.525 per million at 3:1, score 156
- [Gemini 3.5 Flash-Lite](https://tecyfy.com/prices/gemini-3-5-flash-lite.md), Google: $0.85 per million at 3:1, score 145

## Questions

### How much does o3-mini cost?

o3-mini costs $1.10 per million input tokens, the text it reads, and $4.40 per million output tokens, the text it writes, thinking included. On a mix of 3 tokens read for each 1 written, that is $1.93 per million.

### How much does cached input cost on o3-mini?

Text o3-mini reads again from the cache costs $0.55 per million tokens, against $1.10 the first time. OpenAI lists no separate price for writing to the cache.

### Does o3-mini have a batch price?

Yes. With a batch, where you send many requests and collect the answers later instead of at once, o3-mini costs $0.55 per million tokens read and $2.20 per million written.

### What is the context window of o3-mini?

o3-mini holds 200K tokens at once, about 300 pages of English text, and writes up to 100K tokens in one answer. The window holds your instructions, the files you attach, the conversation so far and the answer.

### How good is o3-mini?

o3-mini scores 140 on the Epoch Capabilities Index, an independent score from Epoch AI that combines over 50 benchmarks, with a range of doubt from 137 to 142 (GPT-5 is 150). One score is an average; test it on 10 tasks of your own.

### Is there a cheaper model as good as o3-mini?

Claude Haiku 5.5 from Anthropic scores 159 on the Epoch Capabilities Index, about as well or better, and costs $0.20 per million on a mix of 3 tokens read for each 1 written: o3-mini costs 9.6 times as much. Test both on your own work before you switch.

### Should I still use o3-mini?

It is still sold, so it keeps working, but OpenAI's newest models are GPT-6 Astra, GPT-6.1 Sol and GPT-6 Luna. Compare its price with theirs below, and run your own tasks on the newer model before you move.

### What does a support bot cost a month on o3-mini?

At 2,000 replies a day, each reading 4,000 tokens (50 percent of them from cache) and writing 300, a support bot costs 0.46 cents a reply on o3-mini, $277 a month.

### What does an AI agent task cost on o3-mini?

One 40-turn task that reads 2,800,000 tokens in all, 90 percent of them from cache, and writes 40,000, costs $1.87 on o3-mini. At 10 tasks a day that is $561 a month.

## Sources

- [OpenAI: API prices](https://developers.openai.com/api/docs/pricing)
- [Epoch Capabilities Index, by Epoch AI (CC BY 4.0)](https://epoch.ai/benchmarks/eci)
- Every model's prices as [JSON](https://tecyfy.com/prices.json) or [CSV](https://tecyfy.com/prices.csv), free to use

## Compare

- [GPT-6 Astra vs o3-mini](https://tecyfy.com/prices/compare/gpt-6-astra-vs-o3-mini.md)
- [GPT-6.1 Sol vs o3-mini](https://tecyfy.com/prices/compare/gpt-6-1-sol-vs-o3-mini.md)
- [GPT-6 Luna vs o3-mini](https://tecyfy.com/prices/compare/gpt-6-luna-vs-o3-mini.md)

## OpenAI's other models

- [GPT-6 Astra](https://tecyfy.com/prices/gpt-6-astra.md)
- [GPT-6.1 Sol](https://tecyfy.com/prices/gpt-6-1-sol.md)
- [GPT-6 Luna](https://tecyfy.com/prices/gpt-6-luna.md)
- [GPT-6 Sol](https://tecyfy.com/prices/gpt-6-sol.md)
- [GPT-5.6 Sol](https://tecyfy.com/prices/gpt-5-6-sol.md)
- [GPT-5.6 Terra](https://tecyfy.com/prices/gpt-5-6-terra.md)
- [GPT-5.6 Luna](https://tecyfy.com/prices/gpt-5-6-luna.md)
- [GPT-5.5](https://tecyfy.com/prices/gpt-5-5.md)
- [GPT-5.5 pro](https://tecyfy.com/prices/gpt-5-5-pro.md)
- [GPT-5.4](https://tecyfy.com/prices/gpt-5-4.md)
- [GPT-5.4 mini](https://tecyfy.com/prices/gpt-5-4-mini.md)
- [GPT-5.4 nano](https://tecyfy.com/prices/gpt-5-4-nano.md)
- [GPT-5.4 pro](https://tecyfy.com/prices/gpt-5-4-pro.md)
- [GPT-5.2](https://tecyfy.com/prices/gpt-5-2.md)
- [GPT-5.2 pro](https://tecyfy.com/prices/gpt-5-2-pro.md)
- [GPT-5.1](https://tecyfy.com/prices/gpt-5-1.md)
- [GPT-5](https://tecyfy.com/prices/gpt-5.md)
- [GPT-5 mini](https://tecyfy.com/prices/gpt-5-mini.md)
- [GPT-5 nano](https://tecyfy.com/prices/gpt-5-nano.md)
- [GPT-5 pro](https://tecyfy.com/prices/gpt-5-pro.md)
- [GPT-4.1](https://tecyfy.com/prices/gpt-4-1.md)
- [GPT-4.1 mini](https://tecyfy.com/prices/gpt-4-1-mini.md)
- [GPT-4.1 nano](https://tecyfy.com/prices/gpt-4-1-nano.md)
- [GPT-4o](https://tecyfy.com/prices/gpt-4o.md)
- [GPT-4o (2024-05-13)](https://tecyfy.com/prices/gpt-4o-2024-05-13.md)
- [GPT-4o mini](https://tecyfy.com/prices/gpt-4o-mini.md)
- [o1](https://tecyfy.com/prices/o1.md)
- [o1-pro](https://tecyfy.com/prices/o1-pro.md)
- [o3-pro](https://tecyfy.com/prices/o3-pro.md)
- [o3](https://tecyfy.com/prices/o3.md)
- [o4-mini](https://tecyfy.com/prices/o4-mini.md)
- [GPT-4 Turbo (2024-04-09)](https://tecyfy.com/prices/gpt-4-turbo-2024-04-09.md)
- [GPT-4 (0613)](https://tecyfy.com/prices/gpt-4-0613.md)
- [GPT-3.5 Turbo](https://tecyfy.com/prices/gpt-3-5-turbo.md)
- [GPT-3.5 Turbo (0125)](https://tecyfy.com/prices/gpt-3-5-turbo-0125.md)
- [GPT-3.5 Turbo (1106)](https://tecyfy.com/prices/gpt-3-5-turbo-1106.md)
- [GPT-3.5 Turbo Instruct](https://tecyfy.com/prices/gpt-3-5-turbo-instruct.md)
- [davinci-002](https://tecyfy.com/prices/davinci-002.md)
- [babbage-002](https://tecyfy.com/prices/babbage-002.md)