claude-sonnet-4.5

completions

byanthropic

claude-sonnet-4.5

completions

Published by: anthropicProvider:

anthropic

Claude Sonnet 4.5 is the best coding model in the world. It's the strongest model for building complex agents. It’s the best model at using computers. And it shows substantial gains in reasoning and math.

Released

Sep 29, 2025

Context

200K

Input

$3 / 1M tokens

Output

$15 / 1M tokens

Cached

$0.3 / 1M tokens

Cached Write

$3.75 / 1M tokens

Capabilities: tools, reasoning

Accepts: text, image

Returns: text

Released Sep 29, 2025

Context: 200K Input: $3 / 1M tokensOutput: $15 / 1M tokensCached: $0.3 / 1M tokensCached Write: $3.75 / 1M tokensCapabilities: tools, reasoningAccepts: text, imageReturns: text

Access claude-sonnet-4.5 through LangDB AI Gateway

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Code Examples

Integration samples and API usage

Code Samples for claude-sonnet-4.5

Python SDK Example:

from openai import OpenAI

client = OpenAI(
    base_url="https://api.us-east-1.langdb.ai/projects/<your_project_id>",
    api_key="<your_api_key>"
)

response = client.chat.completions.create(
    model="claude-sonnet-4.5",
    messages=[
        {"role": "user", "content": "Hello, how are you?"}
    ]
)

print(response.choices[0].message.content)

TypeScript SDK Example:

import OpenAI from 'openai';

const client = new OpenAI({
    baseURL: "https://api.us-east-1.langdb.ai/projects/<your_project_id>",
    apiKey: "<your_api_key>"
});

const response = await client.chat.completions.create({
    model: "claude-sonnet-4.5",
    messages: [
        { role: "user", content: "Hello, how are you?" }
    ]
});

console.log(response.choices[0].message.content);

cURL Example:

curl -X POST "https://api.us-east-1.langdb.ai/projects/<your_project_id>/v1/chat/completions" \
  -H "Authorization: Bearer <your_api_key>" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4.5",
    "messages": [
        {"role": "user", "content": "Hello, how are you?"}
    ]
  }'

Model: claude-sonnet-4.5

Provider: anthropic

API Endpoint: $https://api.us-east-1.langdb.ai

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claude-sonnet-4.5 by anthropic - AI Model Details, Pricing, and Performance Metrics

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Access claude-sonnet-4.5 through LangDB AI Gateway

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