o1 API pricing
As of October 22, 2026, OpenAI o1 costs $15.00 per million input tokens and $60.00 per million output tokens on OpenAI's own API, with cached input at $7.50 per million.
- Input, per million tokens$15.00
- Output, per million tokens$60.00
- Cached input, per million$7.50
- Context window200K tokens
- Max output100K tokens
- Output speedNot measured
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.045 | $45.00 | Yes |
| Repository review | 50K input + 3K output tokens | $0.930 | $930.00 | Yes |
| Agent loop | 200K input + 10K output tokens | $3.60 | $3600.00 | No, it would need splitting |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | Not computable | Not computable |
Price history
We have read OpenAI's own price every day since October 21, 2026. It has not changed yet; any change will be listed here with its date.
- October 21, 2026 First recorded: $15.00 input, $60.00 output
Cheaper models as good as o1
Models within two points of o1 or above it on the LLMBenchmark Index, with a lower output price. Cheapest first.
- Qwen3.5-Flash$0.26 Overall 50.1 against 44.6 · 100% cheaper output
- MiMo-V2.6-Flash$0.28 Overall 60.8 against 44.6 · 100% cheaper output
- MiMo-V2.5$0.336 Overall 50.7 against 44.6 · 99% cheaper output
- DeepSeek V4 Flash 0731$0.396 Overall 55.2 against 44.6 · 99% cheaper output
- Claude Haiku 5.5$0.50 Overall 67.6 against 44.6 · 99% cheaper output
o1 pricing questions
- How much does o1 cost per million tokens?
- $15.00 per million input tokens and $60.00 per million output tokens, as listed on OpenRouter on October 22, 2026.
- Does o1 support prompt caching?
- Yes. OpenRouter lists cached input at $7.50 per million tokens, against $15.00 for uncached input.
- Is there a cheaper model as good as o1?
- Qwen3.5-Flash scores 50.1 on the LLMBenchmark Index, within two points of o1 or above it, and costs $0.26 per million output tokens.
- Has the price of o1 changed?
- Not since we started recording it daily on October 21, 2026.