GPT-5.5 Pro
vendorOpenAI · gpt-5.5-pro · prices updated July 7, 2026
Input · 1M tokens
$30
Cached input · 1M
$3−90%
Output · 1M tokens
$180
Price history
inputoutput
Specifications
Context window1,050,000
Knowledge cutoffDec 2025
Tokenizertiktoken (o200k_base)
Batch API−50% off the price
Tools
Web SearchCode InterpreterFile SearchImage GenerationMCP
Exact token counts: local tiktoken tokenizer (o200k_base). Tool calls are billed by the provider separately.
About the model
Top-tier reasoning model (Pro), 1M context