o3 Pro
$20.00 per 1M input tokens and $80.00 per 1M output tokens · 200K context · vision, tools, reasoning, JSON.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
What o3 Pro costs per month
Estimated monthly bill for typical workloads. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $13,920 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $2,400 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $9,120 |
| Content generation 30 long articles a day | $234 |
| Classification / extraction 100,000 short items a day | $21,600 |
Price history
We started tracking o3 Pro 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 Pro
Models with the same tool calling, image input, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| Claude Opus 5.5 Anthropic | $4.00 | $20.00 | 1M | visiontoolsreasoningJSON |
| Claude Sonnet 5.5 Anthropic | $2.00 | $10.00 | 1M | visiontoolsreasoningJSON |
| Claude Fable 5.1 Anthropic | $10.00 | $50.00 | 1M | visiontoolsreasoningJSON |
| GPT-6 Astra OpenAI | $10.00 | $50.00 | 1.05M | visiontoolsreasoningJSON |
| Gemini 4 Argon | $2.00 | $10.00 | 1.05M | visionaudiotoolsreasoningJSON |
How to pay less for o3 Pro
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $13,920 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to Claude Opus 5.5 (similar capabilities) | $2,299 | $11,621 (83%) |
Other workloads: cut-your-bill tool for o3 Pro.
Specifications
| Model ID | openai/o3-pro |
| Input | text, file, image |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | Yes |
| Open weights | No |
| Knowledge cutoff | 2024-06-30 |
| Released | Jun 10, 2025 |
| Web search | $0.01 per request |
FAQ
- How much does o3 Pro cost?
- $20.00 per million input tokens and $80.00 per million output tokens. Prices as of Oct 21, 2026.
- What is the context window of o3 Pro?
- 200K tokens, with up to 100K output tokens per response.
- Does o3 Pro support images, tools and structured output?
- Images as input: yes. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: yes.
- What are cheaper alternatives to o3 Pro?
- Models with the same key capabilities for at least 20% less include Claude Opus 5.5 ($4.00 / $20.00), Claude Sonnet 5.5 ($2.00 / $10.00), Claude Fable 5.1 ($10.00 / $50.00).
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