Claude Sonnet 4.5
vendorAnthropic · claude-sonnet-4-5-20250929 · prices updated June 14, 2026
Input · 1M tokens
$3
Cached input · 1M
$0.3−90%
Output · 1M tokens
$15
Price history
inputoutput
Specifications
Context window200,000
Knowledge cutoffJul 2025
Tokenizertiktoken (cl100k_base)
Batch API−50% off the price
Tools
Web SearchCode InterpreterComputer UseMCP
Exact token counts: local tiktoken tokenizer (cl100k_base). Tool calls are billed by the provider separately.
About the model
Sonnet 4.5 (200K context)