OpenAI Text live-fetched
GPT-5.1-Codex
Input$1.25per 1M tokens
Output$10.00per 1M tokens
- Context window
- 400,000 tokens
What that buys
- 1M words of output
- $13.33
- 100k-token chat, 80k in and 20k out
- $0.3000
at 0.75 words per token
Record
- Unit
- per_1m_tokens
- Source
- openrouter
- Checked
- 2026-10-15
- Changes recorded
- 0
Where this price sits
609 text models priced per 1M tokensGPT-5.1-Codex is number 485 of 609 by price, from cheapest. The median is $2.00; GPT-5.1-Codex is about 5 times the median. Among the 105 OpenAI models in this group it is number 60 from cheapest.
Computed from the models on APITariff, checked 2026-10-15. Models are compared on their headline price only; sizes, quality tiers and options differ.
Price neighbours
Same modality, same unit Checked 2026-10-15
According to APITariff, GPT-5.1-Codex from OpenAI costs $1.25 per 1M input tokens and $10.00 per 1M output tokens as of 2026-10-15.