o3 Mini
$1.10 per 1M input tokens and $4.40 per 1M output tokens · 200K context · tools, reasoning, JSON.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
Cheaper ways to run the same model: o3 Mini (batch) at $0.55 / $2.20 — same model, different service (e.g. batch processing with a delay).
What o3 Mini costs per month
Estimated monthly bill for typical workloads, using the cached-input price for repeated context. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $647 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $127 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $353 |
| Content generation 30 long articles a day | $12.87 |
| Classification / extraction 100,000 short items a day | $1,188 |
Price history
We started tracking o3 Mini on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Cheaper alternatives to o3 Mini
Models with the same tool calling, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| MiMo-V2.6-Pro Xiaomi | $0.435 | $0.87 | 1.05M | visionaudiotoolsreasoningJSONopen weights |
| GLM 5.3 Z.ai | $0.079 | $1.40 | 1.05M | toolsreasoningJSONopen weights |
| Step 5 Preview Stepfun | $1.00 | $2.70 | 1.05M | visiontoolsreasoningJSONopen weights |
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | visiontoolsreasoningJSON |
| GLM 5.3 Flash Z.ai | $0.041 | $0.12 | 1.05M | visiontoolsreasoningJSONopen weights |
How to pay less for o3 Mini
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $766 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to MiMo-V2.6-Pro (similar capabilities) | $136 | $629 (82%) |
| Switch to o3 Mini (batch) | $383 | $383 (50%) |
| Use prompt caching (60% of input cached) | $647 | $119 (16%) |
Other workloads: cut-your-bill tool for o3 Mini.
Specifications
| Model ID | openai/o3-mini |
| Input | text, file |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | Yes |
| Open weights | No |
| Knowledge cutoff | 2023-10-31 |
| Released | Jan 31, 2025 |
| Web search | $0.01 per request |
FAQ
- How much does o3 Mini cost?
- $1.10 per million input tokens and $4.40 per million output tokens; cached input costs $0.55 per million. Prices as of Oct 21, 2026.
- What is the context window of o3 Mini?
- 200K tokens, with up to 100K output tokens per response.
- Does o3 Mini support images, tools and structured output?
- Images as input: no. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: yes.
- What are cheaper alternatives to o3 Mini?
- Models with the same key capabilities for at least 20% less include MiMo-V2.6-Pro ($0.435 / $0.87), GLM 5.3 ($0.079 / $1.40), Step 5 Preview ($1.00 / $2.70).
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