Claude Sonnet 5
Anthropic's best balance of speed and intelligence, reaching near-Opus quality on coding and agentic work
Claude Sonnet 5
Anthropic • June 2026
Training Data
Not publicly disclosed
Claude Sonnet 5
June 2026
Parameters
Not disclosed
Training Method
Advanced Constitutional AI
Context Window
1,000,000 tokens
Knowledge Cutoff
Not disclosed
Key Features
Near-Opus Coding • 1M Context Window • High-Resolution Vision
Capabilities
Coding: Outstanding
Agentic: Outstanding
Cost: $3/$15 per M tokens ($2/$10 intro)
What's New in This Version
Reaches previously Opus-tier quality on coding and agentic work at Sonnet pricing; adaptive thinking on by default with five effort levels and a new tokenizer
Anthropic's best balance of speed and intelligence, reaching near-Opus quality on coding and agentic work
What's New in This Version
Reaches previously Opus-tier quality on coding and agentic work at Sonnet pricing; adaptive thinking on by default with five effort levels and a new tokenizer
Technical Specifications
Key Features
Capabilities
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