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Claude 4 Sonnet

Anthropic Released May 2025

Anthropic's next-generation balanced model with superior coding and reasoning

Claude 4 Sonnet

Anthropic • May 2025

Training Data

Up to early 2025

Claude 4 Sonnet

May 2025

Parameters

~300 billion

Training Method

Constitutional AI

Context Window

200,000 tokens

Knowledge Cutoff

April 2025

Key Features

Advanced Reasoning • Superior Coding • Hybrid Modes

Capabilities

Reasoning: Outstanding

Coding: Outstanding (72.7% SWE-bench)

Speed: Excellent

What's New in This Version

Significant upgrade to Sonnet 3.7 with state-of-the-art coding performance

Anthropic's next-generation balanced model with superior coding and reasoning

What's New in This Version

Significant upgrade to Sonnet 3.7 with state-of-the-art coding performance

Technical Specifications

Parameters ~300 billion
Context Window 200,000 tokens
Training Method Constitutional AI
Knowledge Cutoff April 2025
Training Data Up to early 2025

Key Features

Advanced Reasoning Superior Coding Hybrid Modes

Capabilities

Reasoning: Outstanding
Coding: Outstanding (72.7% SWE-bench)
Speed: Excellent

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Official Documentation Compare with Other Models View Timeline All Anthropic Models