> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unifically.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Claude Opus 5

> Anthropic's Claude Opus 5 language model

Claude Opus 5 is Anthropic's flagship Claude 5 family model, built for the most complex reasoning, research, and agentic workflows.

## Model

```
anthropic/claude-opus-5
```

|              |               |
| ------------ | ------------- |
| **Provider** | Anthropic     |
| **Name**     | Claude Opus 5 |

## Supported Endpoints

All three API formats are supported:

* [Chat Completions](/api-reference/v1-chat-completions) — `POST /v1/chat/completions`
* [Responses](/api-reference/v1-responses) — `POST /v1/responses`
* [Messages](/api-reference/v1-messages) — `POST /v1/messages`

## Example

```bash theme={null}
curl -X POST https://api.unifically.com/v1/messages \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "anthropic/claude-opus-5",
    "max_tokens": 4096,
    "messages": [
      {"role": "user", "content": "Design a distributed job queue with exactly-once semantics."}
    ]
  }'
```