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

GPT-5.1 Codex Mini supports a context window of 256,000 tokens, allowing you to process large documents and maintain long conversations.

How to use GPT-5.1 Codex Mini API via Ofox?

Simply set your base URL to https://api.ofox.run/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.

GPT-5.1 Codex Mini

Name: GPT-5.1 Codex Mini
Brand: openai
Price: 0.25 USD
Availability: InStock

Chat-20%

openai/gpt-5.1-codex-mini

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GPT-5.1 Codex Mini is a smaller and faster version of GPT-5.1-Codex from OpenAI, released on 2025-11-13 for coding work where latency and cost matter more than peak capability. It supports reasoning, tool use, prompt caching, web search, and multimodal input covering images, audio, and video. Context window: 256K tokens, output: 64K. It is the most economical option in the Codex line and fits high-volume agent loops and routine code edits. Accessible via the OpenAI-compatible protocol.

Context Window

256K

Max Output Tokens

66K

Released

2025-11-13

Capabilities

VisionFunction CallingReasoningPrompt CachingWeb SearchAudio InputVideo Input

Available Providers

Azure

Supported Protocols

openai

Providers

Azureprovider.type: "azure_foundry"

-20%

Input Tokens

$0.2/M

$0.25/M

Output Tokens

$1.6/M

$2/M

Cache Read

$0.024/M

$0.03/M

Web Search

$0.035/R

Protocols

openai/v1/chat/completions/v1/responses

Playground

Open in OfoxChat

Code Examples

from openai import OpenAI

client = OpenAI(
    base_url="https://api.ofox.run/v1",
    api_key="YOUR_OFOX_API_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-5.1-codex-mini",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

print(response.choices[0].message.content)