Claude Sonnet 3.7

AnthropicMCP Tool CallReasoning

anthropic/claude-3-7-sonnet-20250219Closed API

Balanced Claude model for coding, analysis, agent workflows, and cost control

Benchmark Pricing$3.00 / 1M in$15.00 / 1M out

Context: 200,000 tokens•Max Output: 64,000 tokens•Knowledge: 2024-10-31•Released: 2025-02-19

TECHNICAL SPECIFICATIONS

Context Window200,000200K tokens

Max Output64,00064K tokens

LicenseProprietaryCloud API only

Input Modalities

TextVisionPDF

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ Claude Sonnet 3.7 natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 200,000 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.

STANDARDIZED BENCHMARKS & EVALS

Aider Polyglotpercent correct

64.9

API CALL INVOCATION EXAMPLE

// Example: Calling Claude Sonnet 3.7 via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.ANTHROPIC_API_KEY,
});

const response = await client.chat.completions.create({
  model: "anthropic/claude-3-7-sonnet-20250219",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

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