GPT-5.1 Codex Mini Pricing - Cost Calculator

Track gpt-5.1-codex-mini pricing with instant alerts, compare providers easily, and stay ahead of cost fluctuations for lightweight automated coding workflows.

Released 13 November 2025, GPT-5.1 Codex Mini is a coding model from OpenAI that has been deprecated. It was replaced by GPT-5.6 Terra on 23 July 2026. A 400,000-token context window feeds responses of up to 100,000 tokens. It costs $0.25 per million input tokens through OpenAI.

Last updated Sep 27, 2026

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Model Details

Released
Nov 13, 2025
Status
Deprecated(on Jul 23, 2026)
Context Length
400,000
Max Output
100,000
Superseded By
GPT-5.6 Terra

Where is GPT-5.1 Codex Mini a perfect fit?

gpt-5.1-codex-mini is built for fast, efficient coding tasks where low latency and low cost matter more than heavy reasoning. Ideal for:
- Everyday coding assistance in terminals and small IDE projects
- Quick bug fixes, linting, formatting, and short code edits
- Auto-generating shell commands and workflow scripts
- Lightweight agentic tasks that don’t require long-chain reasoning
- Integrating inexpensive code intelligence into developer tools

Quick Model Estimate

(USD 0.2500 per 1M tokens)
(USD 2.0000 per 1M tokens)

Your GPT-5.1 Codex Mini Cost Estimate

💰 Total Cost

—

for 1000 input + 1000 output tokens

📥 Input (1000 × $0.250000) —
📤 Output (1000 × $2.000000) —

Cost Breakdown

📥 Input 📤 Output

Prices are watched for changes and checked against the provider's own page.

Pricing

Provider ↕
Modality ↕
Service Tier ↕
Input Price
(per 1M tokens) ↕
Output Price
(per 1M tokens) ↕
Cached Input
(per 1M tokens) ↕
Context Size ↕
View
OpenAI LogoOpenAITextStandard$0.2500$2.0000$0.0250400,000 tokens→

Other Models in the GPT-5.1 Family

GPT-5.1

Active

Multimodal · 400,000 context

GPT-5.1 Chat Latest

Deprecated

Chat · 128,000 context

GPT-5.1 Codex

Deprecated

Code · 400,000 context

GPT-5.1 Codex Max

Deprecated

Code · 400,000 context

FAQs about GPT-5.1 Codex Mini

How much does GPT-5.1 Codex Mini cost per 1M tokens?

GPT-5.1 Codex Mini costs $0.25 per million input tokens, and $2.00 per million output tokens.

What does a typical workload cost with GPT-5.1 Codex Mini?

1,000 requests of 2,000 input and 500 output tokens each — 2,000,000 input and 500,000 output tokens in total — costs $1.50 with GPT-5.1 Codex Mini at its lowest rates. Use the calculator on this page for your own volumes.

Where can I use GPT-5.1 Codex Mini?

GPT-5.1 Codex Mini is available through OpenAI, from $0.25 per million input tokens.

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

GPT-5.1 Codex Mini has a context window of 400,000 tokens, and returns up to 100,000 tokens in a single response.

Is GPT-5.1 Codex Mini still available?

GPT-5.1 Codex Mini is deprecated and was retired on 23 July 2026. The replacement is GPT-5.6 Terra.