# Claude Opus 4.5

> Claude Opus 4.5 on Clonvo: 200K context, $5.00 input and $25.00 output per 1M tokens.

Claude Opus 4.5 is Anthropic's advanced reasoning model built for complex coding, agentic workflows, and long-running tasks with improved multimodal performance, efficiency, and reliability.

-   Model id: `anthropic/claude-opus-4-5-20251101`
-   Provider: Anthropic
-   Released: Nov 24, 2025
-   Context: 200K tokens
-   Max output: 32K tokens

## Pricing

The provider’s list price in USD. Requests on credits are charged exactly this; each response reports its cost in usage.cost.

| Charge | Price | Unit |
| --- | --- | --- |
| Input (prompt) | $5.00 | per 1M tokens |
| Output (completion) | $25.00 | per 1M tokens |
| Cache read | $0.50 | per 1M tokens |
| Cache write | $6.25 | per 1M tokens |
| Cache write (1 hour) | $10.00 | per 1M tokens |
| Web search | $0.01 | per search |

## Capabilities

-   Tools
-   Vision
-   Reasoning
-   Structured outputs
-   Web search

### Reasoning efforts

Values accepted for `reasoning_effort` or `reasoning.effort`:

-   `low`
-   `medium`
-   `high`
-   `xhigh`
-   `max`

### Supported parameters

Upstream parameters this model honours. Others may be ignored.

-   `temperature`
-   `max_tokens`
-   `top_p`
-   `effort`

## Quick start

Use the OpenAI SDK with Clonvo’s base URL and this model id.

```python
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.clonvo.com/v1",
    api_key=os.environ["CLONVO_API_KEY"],
)

completion = client.chat.completions.create(
    model="anthropic/claude-opus-4-5-20251101",
    messages=[{"role": "user", "content": "Summarise the plot of Hamlet in one sentence."}],
)
print(completion.choices[0].message.content)
```

## Data policy

Requests to this model are sent to Anthropic, whose API terms govern how they handle your data: [Anthropic data policy](https://www.anthropic.com/legal/commercial-terms). Clonvo doesn’t store prompts or responses unless your organization turns on retention.

## Bring your own key

From Pay as you go up, a Anthropic key added under Provider keys is used for this model before your credits: $25,000 a month free, then 4% of list price. [How bring-your-own-key works](https://clonvo.com/docs/byok.md).