o3 Mini API pricing
As of October 22, 2026, OpenAI o3 Mini costs $1.10 per million input tokens and $4.40 per million output tokens on OpenAI's own API, with cached input at $0.55 per million.
- Input, per million tokens$1.10
- Output, per million tokens$4.40
- Cached input, per million$0.55
- Context window200K tokens
- Max output100K tokens
- Output speedNot measured
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.0033 | $3.30 | Yes |
| Repository review | 50K input + 3K output tokens | $0.068 | $68.20 | Yes |
| Agent loop | 200K input + 10K output tokens | $0.264 | $264.00 | No, it would need splitting |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | Not computable | Not computable |
Price history
We have read OpenAI's own price every day since October 21, 2026. It has not changed yet; any change will be listed here with its date.
- October 21, 2026 First recorded: $1.10 input, $4.40 output
Cheaper models as good as o3 Mini
Models within two points of o3 Mini or above it on the LLMBenchmark Index, with a lower output price. Cheapest first.
- gpt-oss-20b$0.15 Overall 38.5 against 38.0 · 97% cheaper output
- Qwen3.5-Flash$0.26 Overall 50.1 against 38.0 · 94% cheaper output
- MiMo-V2.6-Flash$0.28 Overall 60.8 against 38.0 · 94% cheaper output
- Qwen3 30B A3B Instruct 2507$0.30 Overall 41.5 against 38.0 · 93% cheaper output
- MiMo-V2.5$0.336 Overall 50.7 against 38.0 · 92% cheaper output
o3 Mini pricing questions
- How much does o3 Mini cost per million tokens?
- $1.10 per million input tokens and $4.40 per million output tokens, as listed on OpenRouter on October 22, 2026.
- Does o3 Mini support prompt caching?
- Yes. OpenRouter lists cached input at $0.55 per million tokens, against $1.10 for uncached input.
- Is there a cheaper model as good as o3 Mini?
- gpt-oss-20b scores 38.5 on the LLMBenchmark Index, within two points of o3 Mini or above it, and costs $0.15 per million output tokens.
- Has the price of o3 Mini changed?
- Not since we started recording it daily on October 21, 2026.