OpenRouter: No markup on token prices (provider pass-through), but credit purchases cost 5.5% via card ($0.80 minimum) or 5% via crypto; BYOK usage above the monthly allowance is charged 5%. source
Changelog for gpt-5.1-codex
No changes recorded for this model yet — history starts the day we first saw it.
gpt-5.1-codex pricing FAQ
How much does gpt-5.1-codex cost per million tokens?
The cheapest tracked gateway charges $1.25 per million input tokens and $10.00 per million output tokens (Glama). Prices refresh continually.
Which gateway is cheapest for gpt-5.1-codex?
Glama for input tokens and Glama for output tokens, among the 2 gateways we track.
Do gpt-5.1-codex prices differ between gateways?
No — every tracked gateway currently charges the same per-token price, so the difference between them is fees and routing, not token cost.