o1 pricing
OpenAI · list prices as of 2026-09-29
| Input | $15 per 1M tokens |
|---|---|
| Output | $60 per 1M tokens |
| Cached input (read) | $7.50 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 | $0.0330 | $990.00 |
| Document summary | 6,000 | 400 | $0.1140 | $3,420 |
| Code change | 3,000 | 1,200 | $0.1170 | $3,510 |
No caching or batch discount. Your own prompt will differ: count it exactly below.
Price your own prompt on o1Similarly priced models
- Claude Fable 5 (Anthropic): 1.3× cheaper
- Claude Fable 5.1 (Anthropic): 1.3× cheaper
- Claude Mythos 5 (Anthropic): 1.3× cheaper
- Claude Mythos 5.1 (Anthropic): 1.3× cheaper
- GPT-4 (OpenAI): 1.5× more
Questions
How much does o1 cost?
o1 costs $15 per million input tokens and $60 per million output tokens, as of 2026-09-29.
How much is one o1 call?
A call with 1,000 input tokens and a 300-token answer costs about $0.0330, or $990.00 a month at 1,000 calls a day.
How big is the o1 context window?
200,000 tokens.