# Claude Mythos Preview API Pricing

As of October 10, 2026, Claude Mythos Preview costs $10.00 per 1M input tokens and $50.00 per 1M output tokens on Anthropic, with cache reads at $1.00 and cache writes at $12.50 per 1M tokens. Across 2 providers on LiteLLM, the input price ranges from $10.00 to $27.50. It has a 1,000,000-token context window and returns up to 128,000 tokens per response.

- Page: https://models.litellm.ai/models/claude-mythos-preview
- Lab: Anthropic
- LiteLLM model name: `claude-mythos-preview`
- Context window: 1,000,000 tokens
- Max output: 128,000 tokens
- Added to LiteLLM: April 2026
- Deprecation date: June 9, 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 |
|---|---|---|---|---|---|---|---|
| Anthropic | `claude-mythos-preview` | $10.00 | $50.00 | $1.00 | – | – | 1M |
| Amazon Bedrock | `anthropic.claude-mythos-preview` | $27.50 | $137.50 | $2.75 | – | – | 1M |
| Amazon Bedrock (APAC cross-region) | `apac.anthropic.claude-mythos-preview` | $27.50 | $137.50 | $2.75 | – | – | 1M |
| Amazon Bedrock (Australia cross-region) | `au.anthropic.claude-mythos-preview` | $27.50 | $137.50 | $2.75 | – | – | 1M |
| Amazon Bedrock (US cross-region) | `us.anthropic.claude-mythos-preview` | $27.50 | $137.50 | $2.75 | – | – | 1M |

## Cost examples

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

- Anthropic: $45.00
- Amazon Bedrock: $123.80

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

- Anthropic: $110.00
- Amazon Bedrock: $302.50

## Features

Supported: Function calling, Structured output, Image input, PDF input, Reasoning, Prompt caching, Computer use.

## Use it with LiteLLM

```python
from litellm import completion

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

## FAQ

### How much does Claude Mythos Preview cost?

Claude Mythos Preview costs $10.00 per 1M input tokens and $50.00 per 1M output tokens on Anthropic, with cache reads at $1.00 and cache writes at $12.50 per 1M tokens. Across 2 providers on LiteLLM, the input price ranges from $10.00 to $27.50.

### What is the context window of Claude Mythos Preview?

Claude Mythos Preview has a 1,000,000-token context window and returns up to 128,000 tokens per response.

### Which providers offer Claude Mythos Preview?

Claude Mythos Preview is available from 2 providers through LiteLLM: Anthropic and Amazon Bedrock. The lowest price is on Anthropic.

### How do I call Claude Mythos Preview with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="claude-mythos-preview", 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 Claude Mythos Preview support?

Claude Mythos Preview supports function calling, structured output, image input, PDF input, reasoning, prompt caching and computer use.

### When did LiteLLM add Claude Mythos Preview?

Claude Mythos Preview was added to LiteLLM's model price file in April 2026.

### Is Claude Mythos Preview being deprecated?

Anthropic deprecated claude-mythos-preview on June 9, 2026.

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