Helicone (Reseller)
OpenAI: GPT-5.1 Codex Pricing
API pricing for OpenAI: GPT-5.1 Codex via Helicone. Input tokens cost $1.25/1M, output tokens cost $10/1M with 400K context window.
Last updated:
Tools
Input Cost
$1.25
per 1M tokens
Output Cost
$10
per 1M tokens
Context Window
400K
tokens
Cost Calculator
Estimated Cost:
$0.00
Model Details
Reseller
Helicone
Model ID
gpt-5.1-codex
Context Window
400K tokens
Max Output
128000 tokens
Cache Read Cost
$0.12500000000000003/1M
Sources