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

# Claude-Opus-4-6-Thinking - Text To Text - openai

> Sophisticated claude opus 4.6 thinking text to text for power users. Deeply reflective AI that considers every angle of your prompt for perfect results.

## Authentication

1. Sign up for a GPTProto account at [https://gptproto.com](https://gptproto.com)
2. Navigate to the API Keys section in your dashboard
3. Generate a new API key (sk-xxxxx)
4. Copy and securely store your API key
   For authentication details, please refer to the [Authentication](https://docs.gptproto.com/authentication) section.

## Initiate Request

<CodeGroup>
  ```bash cURL theme={null}
  curl --location 'https://gptproto.com/v1/chat/completions' \
  --header 'Authorization: GPTPROTO_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "claude-opus-4-6-thinking",
    "messages": [
      {
        "role": "user",
        "content": "Who are you?"
      }
    ],
    "max_tokens": 1024,
    "stream": false
  }'

  ```

  ```javascript JavaScript theme={null}
  const axios = require('axios');
  let data = JSON.stringify({
    "model": "claude-opus-4-6-thinking",
    "messages": [
      {
        "role": "user",
        "content": "Who are you?"
      }
    ],
    "max_tokens": 1024,
    "stream": false
  });

  let config = {
    method: 'post',
    maxBodyLength: Infinity,
    url: 'https://gptproto.com/v1/chat/completions',
    headers: { 
      'Authorization': 'GPTPROTO_API_KEY', 
      'Content-Type': 'application/json'
    },
    data : data
  };

  axios.request(config)
  .then((response) => {
    console.log(JSON.stringify(response.data));
  })
  .catch((error) => {
    console.log(error);
  });


  ```

  ```python Python theme={null}
  import requests
  import json

  url = "https://gptproto.com/v1/chat/completions"

  payload = json.dumps({
    "model": "claude-opus-4-6-thinking",
    "messages": [
      {
        "role": "user",
        "content": "Who are you?"
      }
    ],
    "max_tokens": 1024,
    "stream": False
  })
  headers = {
    'Authorization': 'GPTPROTO_API_KEY',
    'Content-Type': 'application/json'
  }

  response = requests.request("POST", url, headers=headers, data=payload)

  print(response.text)


  ```

  ```go Go theme={null}
  package main

  import (
    "fmt"
    "strings"
    "net/http"
    "io"
  )

  func main() {

    url := "https://gptproto.com/v1/chat/completions"
    method := "POST"

    payload := strings.NewReader(`{
    "model": "claude-opus-4-6-thinking",
    "messages": [
      {
        "role": "user",
        "content": "Who are you?"
      }
    ],
    "max_tokens": 1024,
    "stream": false
  }`)

    client := &http.Client {
    }
    req, err := http.NewRequest(method, url, payload)

    if err != nil {
      fmt.Println(err)
      return
    }
    req.Header.Add("Authorization", "GPTPROTO_API_KEY")
    req.Header.Add("Content-Type", "application/json")

    res, err := client.Do(req)
    if err != nil {
      fmt.Println(err)
      return
    }
    defer res.Body.Close()

    body, err := io.ReadAll(res.Body)
    if err != nil {
      fmt.Println(err)
      return
    }
    fmt.Println(string(body))
  }

  ```
</CodeGroup>

<Accordion title="Response Example">
  ```json theme={null}
  {
    "id": "chatcmpl-abc123",
    "object": "chat.completion",
    "created": 1699896916,
    "model": "claude-opus-4-6",
    "choices": [
      {
        "index": 0,
        "message": {
          "role": "assistant",
          "content": "# Document Analysis Summary\n\n## Key Information:\n- Document Type: Technical API Documentation\n- Total Pages: 35\n- Version: 2.0\n\n## Main Topics:\n1. **Authentication**: The API uses Bearer token authentication with API keys\n2. **Endpoints**: Contains 12 main API endpoints for different operations\n3. **Rate Limiting**: Implements tiered rate limiting based on subscription level\n4. **Error Handling**: Comprehensive error codes and handling strategies\n\n## Key Sections:\n\n### Getting Started\n- Quick start guide for new developers\n- Authentication setup instructions\n- First API call examples in multiple languages\n\n### API Reference\n- Detailed endpoint documentation\n- Request/response formats\n- Parameter descriptions and constraints\n\n### Best Practices\n- Recommended usage patterns\n- Performance optimization tips\n- Security considerations\n\n### Code Examples\n- Python, JavaScript, Go, and cURL examples\n- Common use case implementations\n- Error handling patterns\n\n## Important Notes:\n- All requests must include valid API key\n- Rate limits: 100 requests/minute for free tier, 1000/minute for premium\n- Support for both JSON and XML response formats\n- Webhook notifications available for asynchronous operations"
        },
        "finish_reason": "stop"
      }
    ],
    "usage": {
      "prompt_tokens": 3500,
      "completion_tokens": 285,
      "total_tokens": 3785
    }
  }
  ```
</Accordion>

## Parameters

| Parameter     | Type    | Required | Default                                                       | Description                                                                                                   |
| ------------- | ------- | -------- | ------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- |
| `model`       | string  | ✅ Yes    | `claude-opus-4-6`                                             | The model to use for the request                                                                              |
| `messages`    | array   | ✅ Yes    | `[{"role": "user", "content": "What's the weather in NYC?"}]` | Array of message objects for the conversation. Each message must have a role (user or assistant) and content. |
| `tools`       | array   | ✅ Yes    | -                                                             | Array of tool objects. For web search, must include the web\_search tool configuration.                       |
| `stream`      | boolean | ❌ No     | `false`                                                       | Whether to stream the response                                                                                |
| `temperature` | number  | ❌ No     | `1.0`                                                         | Amount of randomness injected into the response. Ranges from 0.0 to 1.0                                       |
| `top_p`       | number  | ❌ No     | `1.0`                                                         | Use nucleus sampling. Ranges from 0.0 to 1.0                                                                  |
| `max_tokens`  | integer | ❌ No     | -                                                             | The maximum number of tokens to generate before stopping                                                      |
| `stop`        | array   | ❌ No     | -                                                             | Custom text sequences that will cause the model to stop generating                                            |

### Messages Array Structure

Each message object in the `messages` array should have the following structure:

| Field     | Type         | Required | Description                                                       |
| --------- | ------------ | -------- | ----------------------------------------------------------------- |
| `role`    | string       | ✅ Yes    | The role of the message. Can be: `user`, `assistant`, or `system` |
| `content` | array/string | ✅ Yes    | The content of the message                                        |

### Content Array Structure (when content is an array)

| Field  | Type   | Required | Example                        | Description                          |
| ------ | ------ | -------- | ------------------------------ | ------------------------------------ |
| `type` | string | ✅ Yes    | `text`                         | The type of content                  |
| `text` | string | ✅ Yes    | `"What's the weather in NYC?"` | The text content when type is `text` |

### Tools Array Structure

For web search functionality, the `tools` array should contain a web search tool object:

| Field             | Type    | Required | Example                                | Description                                                                 |
| ----------------- | ------- | -------- | -------------------------------------- | --------------------------------------------------------------------------- |
| `type`            | string  | ✅ Yes    | `web_search`                           | The type of tool. Must be `web_search` for web search                       |
| `max_uses`        | integer | ❌ No     | `5`                                    | Maximum number of times the web search tool can be used in a single request |
| `allowed_domains` | array   | ❌ No     | `["example.com", "trusteddomain.org"]` | Only include search results from these domains                              |
| `blocked_domains` | array   | ❌ No     | `["untrustedsource.com"]`              | Never include search results from these domains                             |

#### Max Uses

The `max_uses` parameter limits the number of searches performed. If Claude attempts more searches than allowed, the web search result will be an error with the `max_uses_exceeded` error code.

#### Domain Filtering

When using domain filters:

* Domains should not include the HTTP/HTTPS scheme (use `example.com` instead of `https://example.com`)
* Subdomains are automatically included (`example.com` covers `docs.example.com`)
* Specific subdomains restrict results to only that subdomain (`docs.example.com` returns only results from that subdomain, not from `example.com` or `api.example.com`)
* Subpaths are supported (`example.com/blog`)
* You can use either `allowed_domains` or `blocked_domains`, but not both in the same request

#### Complete Tool Configuration Example

```json theme={null}
{
  "type": "web_search_20250305",
      "name": "web_search",
  "max_uses": 5,
  "allowed_domains": ["example.com", "trusteddomain.org"]
}
```

## Error Codes

### Common Error Codes

| Error Code | Error Name               | Description                                                                                                       |
| ---------- | ------------------------ | ----------------------------------------------------------------------------------------------------------------- |
| 401        | Unauthorized             | API key is missing or invalid                                                                                     |
| 403        | Forbidden                | Your API key doesn't have permission to access this resource, or insufficient balance for the requested operation |
| 429        | Too Many Requests        | You've exceeded your rate limit                                                                                   |
| 500        | Internal server error    | An internal server error occurred                                                                                 |
| 503        | Content policy violation | Content blocked due to safety concerns (actual status code is 400)                                                |