o3 Pro API pricing
OpenAI model · OpenAI on AIWiseRank
Short answer
o3 Pro by OpenAI costs $20 per 1M input tokens and $80 per 1M output tokens, with a 200K token context window. It scores 4.9% on ARC-AGI-2. GPT-5 nano scores about as well on ARC-AGI-2 (2.6%) for $0.14 per 1M blended tokens versus $35.
Prices updated Oct 23, 2026 (APIpulse, CC BY 4.0) · Benchmarks: ARC Prize, Vals.ai · all models
API cost calculator
Enter your monthly usage in millions of tokens (1M tokens ≈ 750,000 words).
Standard rates; batch processing and prompt caching can lower the bill.
Benchmarks
Cheaper models with similar scores
Within 3 points on the same benchmark, at a lower blended price.
- GPT-5 nanoARC-AGI-2 2.6% · $0.14 / 1M
- GPT-6 LunaARC-AGI-2 59.3% · $0.20 / 1M
- Claude Haiku 5.5ARC-AGI-2 61.3% · $0.20 / 1M
Other OpenAI models
| Model | Input / 1M | Output / 1M |
|---|---|---|
| GPT-6.1 Sol | $2 | $10 |
| GPT-6 Astra | $10 | $50 |
| GPT-6 Sol | $2 | $10 |
| GPT-6 Luna | $0.10 | $0.50 |
| GPT-5.6 Cyber | $12.50 | $75 |
| GPT-5.6 Sol | $4 | $20 |
| GPT-5.6 Terra | $2 | $12 |
| GPT-5.6 Luna | $0.20 | $1.20 |
Frequently asked questions
How much does the o3 Pro API cost?
o3 Pro costs $20 per 1M input tokens and $80 per 1M output tokens. A workload of 10M input and 2M output tokens a month costs $360.
What is the context window of o3 Pro?
o3 Pro supports a 200K token context window.
Is there a cheaper alternative to o3 Pro?
GPT-5 nano scores 2.6% on ARC-AGI-2, close to o3 Pro, at $0.14 per 1M blended tokens versus $35.