Exactly double the cost of GPT 5.4 - $5 per MTok input, $0.50 cached, $30 output.

All the AI players definitely seem to be trying to claw more money out of their users at the moment.

It's 2x/token, but for default reasoning we've found GPT-5.5 uses fewer tokens overall, so net cheaper on median. [1]

(Note, that stops being true at higher reasoning levels, where our observed total cost goes up ~2-3x.)

[1] https://x.com/voratiq/status/2047737190323769488?s=20

https://openrouter.ai/openai/gpt-5.5-pro

30/180 usd on Openrouter. Did I miss something?