How much does gpt-5.1-codex cost per 1M tokens?

gpt-5.1-codex is priced at $1.25 per 1M input tokens and $10.00 per 1M output tokens on openrouter. This is a stored listed price and may differ from current provider terms; no source link is stored, so check the provider pricing page before making a decision.

Who provides gpt-5.1-codex?

gpt-5.1-codex is provided by OpenAI. ModelPriceLab also tracks third-party platforms that resell or proxy this model.

What does the price record timestamp mean?

It shows when ModelPriceLab's stored record changed. It is not an independent source-verification timestamp; confirm current pricing with the provider or platform.

ModelPriceLab

Public data feed

OpenAI

gpt-5.1-codex pricing

Compare stored list-price records, context window, and recent API changes. Source links are shown where available; verify current provider terms before deciding.

Input / 1M Tokens

$1.25

Output / 1M Tokens

$10.00

Context window

—

Record updated 2026-08-12 · openrouter

Model details Vendor API pricing Related API changes Check stack cost impact

Pricing per platform

Same model, different platforms. Cached input prices apply when supported.

Platform	Region	Input / 1M	Output / 1M	Cached input	Context
openrouter No source link stored	global	$1.25	$10.00	$0.13	—
official No source link stored	global	-	-	-	—

Price history

Stored record history where available. Timestamps reflect database updates, not independent source verification.

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Monthly Input (Millions)

Monthly Output (Millions)

Cache Hit Ratio20%

Percentage of input tokens that match cached context.

Lowest listed-rate estimate

GPT-5.1-Codex

OpenAI

$15.13/mo

Monthly cost comparison

OpenAI

GPT-5.1-Codex

$15.13/mo

Input$5.00

Cached input$0.13

Output$10.00

Lowest cost in this comparison

Frequently asked questions

How much does gpt-5.1-codex cost per 1M tokens?: gpt-5.1-codex is priced at $1.25 per 1M input tokens and $10.00 per 1M output tokens on openrouter. This is a stored listed price and may differ from current provider terms; no source link is stored, so check the provider pricing page before making a decision.
Who provides gpt-5.1-codex?: gpt-5.1-codex is provided by OpenAI. ModelPriceLab also tracks third-party platforms that resell or proxy this model.
What does the price record timestamp mean?: It shows when ModelPriceLab's stored record changed. It is not an independent source-verification timestamp; confirm current pricing with the provider or platform.

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OpenAI gpt-5.1-codex API Pricing — Token Costs & Alternatives