OpenAI

GPT 5.1 Codex Max

Type
image generation
Context
400K tokens
Max output
128K
Released
8 December 2025
Knowledge cutoff
September 2024
API string
openai/gpt-5.1-codex-max

Prices by provider

Provider Input, $ per 1M Output, $ per 1M In our data since
Poe $1.1 $9 31 Jul 2026
Requesty $1.1 $9 31 Jul 2026
Jiekou.AI $1.125 $9 31 Jul 2026
vivgrid $1.25 $10 31 Jul 2026
neon $1.25 $10 31 Jul 2026
Abacus.AI $1.25 $10 31 Jul 2026
DigitalOcean Gradient AI $1.25 $10 1 Aug 2026
Kilo Code $1.25 $10 31 Jul 2026
Microsoft Foundry $1.25 $10 31 Jul 2026
OpenAI $1.25 $10 31 Jul 2026
OpenCode Zen $1.25 $10 31 Jul 2026
OpenRouter $1.25 $10 31 Jul 2026
OrcaRouter $1.25 $10 31 Jul 2026
Vercel $1.25 $10 31 Jul 2026
NanoGPT $2.5 $20 31 Jul 2026

Only the base tier and only per-token prices are shown. Batch, discounted and cached rates, as well as prices per image or per second of video, do not go into this table: they cannot stand in the same column as a price per million tokens.

The date in the last column is the day this price first entered our collection. The price may well be older: before that day we simply were not recording it. It has not changed since — otherwise a new row with a new date would stand in its place.

Measurement results

Task set Result Run conditions Measured by
Terminal-Bench — working in the command line 60.4 % · with a tuned harness Terminal-Bench v2 Leaderboard