Claude Opus 4.5
vendorAnthropic · claude-opus-4-5-20251101 · prices updated February 24, 2026
Input · 1M tokens
$5
Cached input · 1M
$0.5−90%
Output · 1M tokens
$25
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
Latest flagship model (Nov 2025)