How much does GPT-5.1-Codex-Max cost per token?

GPT-5.1-Codex-Max is priced at $1.25 per million input tokens and $10.00 per million output tokens, per OpenRouter as of Jul 8, 2026.

What is GPT-5.1-Codex-Max's context window?

GPT-5.1-Codex-Max supports a context window of up to 400K tokens, per OpenAI.

What are the alternatives to GPT-5.1-Codex-Max?

By OpenRouter usage, comparable models include Hy3, DeepSeek V4 Flash, and MiniMax M3. Side-by-side comparisons are linked in the alternatives table.

ModelsOpenAI

GPT-5.1-Codex-Max

Name: GPT-5.1-Codex-Max
Author: OpenAI

openrouter price docs

Context

400K

tokens

Released

Dec 4, 2025

on OpenRouter

Pricing

Price per million tokens

Input $/MTok

$1.25

OpenRouter · Jul 8, 2026

Output $/MTok

$10.00

OpenRouter · Jul 8, 2026

Cache read $/MTok

$0.13

OpenRouter

Current GPT-5.1-Codex-Max prices per million tokens across tracked sources.
Source	Tracked slug	In $/MTok	Out $/MTok	Cache read	Cache write	Context	Effective	Last Δ (in)
OpenRouter	openai/gpt-5.1-codex-max	$1.25	$10.00	$0.13	—	400K	Jul 8, 2026	—
models.dev	nano-gpt/openai/gpt-5.1-codex-max	$2.50	$20.00	—	—	400K	Jul 8, 2026	122.2%

latest tracked price per source · Δ = most recent input-price move within that source

2 sources tracking

Input $/MTok

Output $/MTok

per-source step lines · $/MTok

history since Jul 8, 2026

Specs

Context & availability

GPT-5.1-Codex-Max specifications.
Provider	OpenAI
Context window	400K tokens
Listed on OpenRouter	Dec 4, 2025
Tracked price sources	OpenRouter · models.dev
OpenRouter slugs	openai/gpt-5.1-codex-max · openai/gpt-5.1-codex-max-20251204

source: OpenRouter model catalog + tracked price feeds

id: gpt-5-1-codex-max

Usage

Share of OpenRouter tokens

90-day daily

usage share pending — this model isn't in the tracked OpenRouter model rankings yet

Benchmarks

Benchmark results

Benchmark scores for GPT-5.1-Codex-Max.
Benchmark	Configuration	Score	Date	Source
no benchmark results attributed to GPT-5.1-Codex-Max yet

scores as published by each benchmark; configurations differ — compare within a row's benchmark only

Alternatives

Similar models

Alternatives to GPT-5.1-Codex-Max by OpenRouter usage-rank proximity.
#	Model	Tokens/day	7d Δ	Head-to-head
1	Hy3Tencent	857.5B	—	vs GPT-5.1-Codex-Max
2	DeepSeek V4 FlashDeepSeek	806.2B	6.6%	vs GPT-5.1-Codex-Max
3	MiniMax M3MiniMax	665.9B	9.8%	vs GPT-5.1-Codex-Max
5	DeepSeek V4 ProDeepSeek	530.6B	50.5%	vs GPT-5.1-Codex-Max

ranked by OpenRouter usage-rank proximity

snapshot Jul 7, 2026

FAQ

GPT-5.1-Codex-Max FAQ

How much does GPT-5.1-Codex-Max cost per token?: GPT-5.1-Codex-Max is priced at $1.25 per million input tokens and $10.00 per million output tokens, per OpenRouter as of Jul 8, 2026.
What is GPT-5.1-Codex-Max's context window?: GPT-5.1-Codex-Max supports a context window of up to 400K tokens, per OpenAI.
What are the alternatives to GPT-5.1-Codex-Max?: By OpenRouter usage, comparable models include Hy3, DeepSeek V4 Flash, and MiniMax M3. Side-by-side comparisons are linked in the alternatives table.

Alerts

Track GPT-5.1-Codex-Max

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