One agent session
1M input tokens and 100K output tokens, no caching.
- Input1M x $150 = $150.00
- Output0.1M x $600 = $60.00
$210.00per session
OpenAI - Closed weights
o1-pro pricing and specs
o1-pro is a closed-weights model from OpenAI that costs $150 per 1M input tokens and $600 per 1M output tokens on the first-party API, with a 200K-token context window.
Last verified from developers.openai.com. All sources
- Input / 1M
- $150
- Output / 1M
- $600
- Context
- 200K tokens
- Weights
- Closed
Pricing per 1M tokens
| Item | Price / 1M tokens |
|---|---|
| Input | $150 |
| Output | $600 |
| Batch inputBatch requests | $75 |
| Batch outputBatch requests | $300 |
Note: No cached-input discount. Not found in the Vercel AI Gateway model list. Default snapshot o1-pro-2025-03-19.
Specs
- Context window
- 200,000 tokens
- Max output
- 100,000 tokens
- Release date
- Provider
- OpenAI
- API model id
o1-pro- Weights
- Closed weights
What o1-pro costs in practice
Worked from the standard list rates above, with the math shown so you can swap in your own token counts.
A chat app
10,000 requests a day at 2K input and 500 output tokens each.
- Input20M x $150 = $3,000.00
- Output5M x $600 = $3,000.00
$6,000.00per day
$180,000.00 per 30-day month
Compare with
| Model | Input / 1M | Output / 1M |
|---|---|---|
| o1-pro (this page) | $150 | $600 |
| GPT-5.5 ProOpenAI | $30 | $180 |
| GPT-5 ProOpenAI | $15 | $120 |
| o3-proOpenAI | $20 | $80 |
| GPT-5.6 CyberOpenAI | $12.50 | $75 |
| GPT-4OpenAI | $30 | $60 |
| o1OpenAI | $15 | $60 |
Related reading
- Codex CLI 0.163: Instant Steering Is Now the DefaultCodex CLI 0.163.0 makes mid-response steering the default and adds searchable /config and a leader key. What changed and what to check before upgrading.
- Tool Calling Under the Hood: Claude Messages vs OpenAI ResponsesHow tool calling works on the wire: JSON schema tools, parallel calls, tool_choice, strict mode and streaming deltas in Claude Messages vs OpenAI Responses.
- Codex 'gpt-5.5 Model Is Not Supported' Error: The FixCodex says gpt-5.5 is not supported with a ChatGPT account because OpenAI retired it from ChatGPT sign-in on October 14. The fix and what still works.
- Codex CLI Background Daemon: How to Turn It OffCodex CLI starts a persistent, self-updating background daemon since 0.157.0. What it does, why it hit Hacker News and the reported workaround to turn it off.
- Codex CLI 0.162: Managed Worktrees and Pinned TasksCodex CLI 0.162 lets the agent create and list its own Git worktrees, adds pinned tasks and custom provider capability overrides. What to change this week.
- ChatGPT Free vs Go vs Plus After GPT-6: Which Model You GetFree and Go ($8) both get GPT-6 Luna in Chat. Plus ($20) is the cheapest plan with GPT-6 Sol and full Codex. What each ChatGPT plan buys now.
FAQ
How much does o1-pro cost per million tokens?
o1-pro costs $150 per 1M input tokens and $600 per 1M output tokens on OpenAI's first-party API, per developers.openai.com on October 17, 2026. Per 1M tokens, the batch rate is $75 input and $300 output.
What is o1-pro's context window?
o1-pro has a 200,000-token context window and returns up to 100,000 output tokens per response.
Are o1-pro's weights open?
No. o1-pro is a closed-weights model. You call it through OpenAI's API as o1-pro.
When was o1-pro released?
OpenAI released o1-pro on March 19, 2025.
Sources
Last verified from developers.openai.com.
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