GPT-5.5
vendorOpenAI · gpt-5.5 · prices updated June 14, 2026
Input · 1M tokens
$5
Cached input · 1M
$0.5−90%
Output · 1M tokens
$30
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 GenerationComputer UseMCP
Exact token counts: local tiktoken tokenizer (o200k_base). Tool calls are billed by the provider separately.
About the model
Flagship with a 1M context (>272K tokens billed at ×2/×1.5)