Claude Opus 5
vendorAnthropic · claude-opus-5 · prices updated September 29, 2026
Input · 1M tokens
$5
Cached input · 1M
$0.5−90%
Output · 1M tokens
$25
Price history
inputoutput
Specifications
Context window1,000,000
Knowledge cutoffMay 2026
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
Opus 5 (2026-07-24); legacy since 2026-09-22, the current Opus is 5.5; 1M context