The first Claude 4 Sonnet model, offering a strong balance of intelligence and speed with extended thinking capabilities. Sonnet 4 handles complex coding, analysis, and reasoning tasks with 1M context window (beta) and 64K output. Superseded by Sonnet 4.5 which brings improved nuance and performance.
Try NowBalanced professional task
Complex coding with moderate budget
Need thinking mode for analysis
1,000,000 tokens
64,000 tokens
$3 per 1M tokens
$15 per 1M tokens
$0.30 per 1M tokens
$3.75 per 1M tokens
$10 per 1K calls
$0.0694 per 1K calls