o1 (Reasoning)
vendorOpenAI · o1 · prices updated February 24, 2026
Input · 1M tokens
$15
Cached input · 1M
$7.5−50%
Output · 1M tokens
$60
Price history
inputoutput
Specifications
Context window200,000
Knowledge cutoffOct 2023
Tokenizertiktoken (o200k_base)
Batch API−50% off the price
Tools
File SearchMCP
Exact token counts: local tiktoken tokenizer (o200k_base). Tool calls are billed by the provider separately.
About the model
Legacy reasoning model; API shuts down on 2026-10-23