# o1 API Pricing

As of October 10, 2026, o1 costs $15.00 per 1M input tokens and $60.00 per 1M output tokens on OpenAI, with cache reads at $7.50 per 1M tokens. It has a 200,000-token context window and returns up to 100,000 tokens per response.

- Page: https://models.litellm.ai/models/o1
- Lab: OpenAI
- LiteLLM model name: `o1`
- Context window: 200,000 tokens
- Max output: 100,000 tokens
- Added to LiteLLM: December 2024
- Deprecation date: October 23, 2026
- Prices updated: October 10, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| OpenAI | `o1` | $15.00 | $60.00 | $7.50 | – | – | 200K |
| OpenAI (snapshot 2024-12-17) | `o1-2024-12-17` | $15.00 | $60.00 | $7.50 | – | – | 200K |
| Azure OpenAI | `azure/o1` | $15.00 | $60.00 | $7.50 | – | – | 200K |
| Azure OpenAI (snapshot 2024-12-17) | `azure/o1-2024-12-17` | $15.00 | $60.00 | $7.50 | – | – | 200K |
| Replicate | `replicate/openai/o1` | $15.00 | $60.00 | – | – | – | – |
| Vercel AI Gateway | `vercel_ai_gateway/openai/o1` | $15.00 | $60.00 | $7.50 | – | – | 200K |
| Azure OpenAI (eu, snapshot 2024-12-17) | `azure/eu/o1-2024-12-17` | $16.50 | $66.00 | $8.25 | – | – | 200K |
| Azure OpenAI (us, snapshot 2024-12-17) | `azure/us/o1-2024-12-17` | $16.50 | $66.00 | $8.25 | – | – | 200K |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- OpenAI: $60.00
- Azure OpenAI: $60.00
- Replicate: $60.00
- Vercel AI Gateway: $60.00
- OpenAI batch: $30.00

100 long-document requests with 100,000 input and 2,000 output tokens each:

- OpenAI: $162.00
- Azure OpenAI: $162.00
- Replicate: $162.00
- Vercel AI Gateway: $162.00

## Features

Supported: Function calling, Structured output, Image input, PDF input, Reasoning, Prompt caching.
Not supported: Parallel tool calls.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="o1",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does o1 cost?

o1 costs $15.00 per 1M input tokens and $60.00 per 1M output tokens on OpenAI, with cache reads at $7.50 per 1M tokens. Batch requests cost $7.50 per 1M input tokens and $30.00 per 1M output tokens.

### What is the context window of o1?

o1 has a 200,000-token context window and returns up to 100,000 tokens per response.

### Which providers offer o1?

o1 is available from 4 providers through LiteLLM: OpenAI, Azure OpenAI, Replicate and Vercel AI Gateway.

### How do I call o1 with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="o1", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does o1 support?

o1 supports function calling, structured output, image input, PDF input, reasoning and prompt caching. It does not support parallel tool calls.

### When did LiteLLM add o1?

o1 was added to LiteLLM's model price file in December 2024.

### Is o1 being deprecated?

OpenAI lists a deprecation date of October 23, 2026 for o1.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json