Claude-Sonnet-4-5-20250929-Thinking - Text To Text

curl -X POST "https://gptproto.com/v1/messages" \
  -H "Authorization: YOUR_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "claude-sonnet-4-5-20250929-thinking",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Who are you?"
    }
  ]
}'

import anthropic

client = anthropic.Anthropic(
    api_key="YOUR_API_KEY",
    base_url="https://gptproto.com"
)

message = client.messages.create(
    model="claude-sonnet-4-5-20250929-thinking",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Who are you?"}
    ]
)

print(message.content)

import Anthropic from '@anthropic-ai/sdk';

const client = new Anthropic({
  apiKey: 'YOUR_API_KEY',
  baseURL: 'https://gptproto.com'
});

const message = await client.messages.create({
  model: 'claude-sonnet-4-5-20250929-thinking',
  max_tokens: 1024,
  messages: [
    { role: 'user', content: 'Who are you?' }
  ]
});

console.log(message.content);

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
)

func main() {
    url := "https://gptproto.com/v1/messages"

    payload := []byte(`{
  "model": "claude-sonnet-4-5-20250929-thinking",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Who are you?"
    }
  ]
}`)

    req, _ := http.NewRequest("POST", url, bytes.NewBuffer(payload))
    req.Header.Set("Authorization", "YOUR_API_KEY")
    req.Header.Set("anthropic-version", "2023-06-01")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := ioutil.ReadAll(resp.Body)
    fmt.Println(string(body))
}

{
  "error": {
    "type": "authentication_error",
    "message": "Invalid API key"
  }
}

{
  "error": {
    "type": "invalid_request_error",
    "message": "messages: field required"
  }
}

{
  "error": {
    "type": "rate_limit_error",
    "message": "Rate limit exceeded"
  }
}

{
  "error": {
    "type": "api_error",
    "message": "Internal server error"
  }
}

{
  "error": {
    "type": "overloaded_error",
    "message": "Service is temporarily overloaded"
  }
}