Overview

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with improvements across system desig...

Key Features

• Multimodal capabilities (Text, Image → Text)
• 1.0M tokens context window
• Up to 64,000 output tokens
• API access available