o3 pricing
OpenAI · list prices as of 2026-09-29
| Input | $2 per 1M tokens |
|---|---|
| Output | $8 per 1M tokens |
| Cached input (read) | $0.50 per 1M tokens |
| Batch / async | 50% off |
| Context window | 200K tokens |
| Longest answer | 100K tokens |
What a call costs
| Typical call | Input tokens | Output tokens | Per call | Per month at 1,000 a day |
|---|---|---|---|---|
| Chat reply | 1,000 | 300 | $0.0044 | $132.00 |
| Document summary | 6,000 | 400 | $0.0152 | $456.00 |
| Code change | 3,000 | 1,200 | $0.0156 | $468.00 |
No caching or batch discount. Your own prompt will differ: count it exactly below.
Price your own prompt on o3Similarly priced models
- GPT-4.1 (OpenAI): about the same
- Gemini 2.5 Pro (Google): 1.0× cheaper
- GPT-5 (OpenAI): 1.0× cheaper
- GPT-5.1 (OpenAI): 1.0× cheaper
- Gemini 3.5 Flash (Google): 1.0× cheaper
Questions
How much does o3 cost?
o3 costs $2 per million input tokens and $8 per million output tokens, as of 2026-09-29.
How much is one o3 call?
A call with 1,000 input tokens and a 300-token answer costs about $0.0044, or $132.00 a month at 1,000 calls a day.
How big is the o3 context window?
200,000 tokens.