GPT-5.5
OpenAIReleased 2026-04 · o200k_base tokenizer
Pricing
Input
$5.00 /M tokens
Cached input
$0.500 /M tokens
Output
$30.00 /M tokens
Specs
Context window
272K tokens
Max output
16.4K tokens
Features
VisionToolsCaching Reasoning Structured
Released 2026-04 · o200k_base tokenizer
Input
$5.00 /M tokens
Cached input
$0.500 /M tokens
Output
$30.00 /M tokens
Context window
272K tokens
Max output
16.4K tokens