GPT-5.1-Codex-Mini: API pricing, context window and capabilities

Prices from official vendor price lists · October 2026

GPT-5.1-Codex-Mini costs $0.25 per 1M input tokens and $2 per 1M output tokens, with a 400K context window. Mid-priced: dearer than 50% of this rating, with GPT-5.4 Nano as the nearest cheaper OpenAI option. Recorded for vision, coding, reasoning.

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Capabilities

API $/1M (in / out)

$0.25 / $2

Context window

400K tokens

Price / mo

API only

Overview Reviews

GPT-5.1-Codex-Mini is an AI model from OpenAI, priced at $0.25 input and $2 output per 1M tokens. That places it in the mid tier of this rating — dearer than 50% of the 205 priced models listed.

It holds 400K tokens in a single conversation. Capabilities recorded in this rating: text & chat, vision, coding, reasoning, tool calling. Access is through the API rather than a consumer subscription.

API price$0.25 / $2per 1M tokens, in / out

Context400K tokenstokens per conversation

VendorOpenAIall models from this vendor

TierMiddearer than 50% of models

Cost calculator

1M tokens/mo10M tokens/mo50M tokens/mo200M tokens/mo

Standard$1.56~~AED 6 per month~~

With batch −50%$0.78~~AED 3 per month~~

With caching on input$1.51~~AED 6 per month~~

Standard$15.63~~AED 57 per month~~

With batch −50%$7.81~~AED 29 per month~~

With caching on input$15.06~~AED 55 per month~~

Standard$78.13~~AED 287 per month~~

With batch −50%$39.06~~AED 143 per month~~

With caching on input$75.31~~AED 277 per month~~

Standard$313~~AED 1,148 per month~~

With batch −50%$156~~AED 574 per month~~

With caching on input$301~~AED 1,106 per month~~

Assumes a 1:3 input-to-output ratio, which is typical for chat and generation. Dirham figures use 3.6725 per dollar. Batch and caching discounts apply where the vendor offers them.

Compared with alternatives

How GPT-5.1-Codex-Mini sits against its neighbours in this rating. Tap a card to open that model.

Qwen3.6 Plus

Cheaper

Alibaba (Qwen)

$0.325 / $1.951M tokens

Qwen3.6 27B

Closest match

Alibaba (Qwen)

$0.3 / $2262.1K tokens

Kimi K2.5

Step up

Moonshot AI

$0.45 / $2.25262.1K tokens

Good and poor fit

Good fit

Multi-step analysis, planning and code review, where the first plausible answer is often wrong.
Writing, reviewing and refactoring code, including fill-in-the-middle edits.
Reading screenshots, charts, scanned documents and photos.

Poor fit

Long multi-step reasoning, where a larger model finishes in fewer attempts.

Related filters

Text & chat234 models for text generation and chat

Vision159 models that read images

Coding17 models built for writing code

Reasoning175 models that think before answering

Tool calling172 models that call your functions

OpenAI30 models from this vendor

All 245 modelsThe full rating with filters and prices

Frequently asked questions

How much does GPT-5.1-Codex-Mini cost?

$0.25 / $2 per 1M tokens, input and output. In dirhams that is roughly AED 0.92 per 1M input tokens. Batch processing halves it where the vendor offers it.

What is the context window of GPT-5.1-Codex-Mini?

400K tokens in a single conversation.

What can GPT-5.1-Codex-Mini do?

In this rating it is recorded with: text & chat, vision, coding, reasoning, tool calling, structured JSON output, code execution, prompt caching, batch API, priority / fast tier, low latency, multilingual, proprietary API.

Is GPT-5.1-Codex-Mini a good choice?

It depends on the job. See the good-fit and poor-fit lists above, and compare against the neighbouring models before committing.

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