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OpenAI

GPT Pro Latest (GPT-5.5 Pro)

Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding

Model facts

Context window
1.05M tokens
Maximum output
128K tokens
Cheapest paid input
$30 per 1M tokens
Cheapest paid output
$180 per 1M tokens
Open weights
no
Providers
1

Capabilities and modalities

reasoning, tool calling, structured output, attachments, text, image, pdf.

Observed price history

  • 2026-09-06: $30 input / $180 output per 1M tokens

API providers