Codex Mini

codex-mini

Codex Mini is a fine-tuned o4-mini model made for the Codex CLI. For most direct API usage, it’s better to use gpt-4.1 instead.

Context: 200K tokens
Endpoint

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Pricing

Input$0.75 / 1M

Output$3.00 / 1M

Cache Write (5m)$0.75 / 1M

Cache Write (1h)$0.75 / 1M

Cache Read$0.75 / 1M

Web Search$0 / 1M

Quick Start

Select an endpoint and copy a working example for this model.

Endpoint

python

from openai import OpenAI client = OpenAI(    api_key="YOUR_API_KEY",    base_url="https://api.apertis.ai/v1") response = client.responses.create(    model="codex-mini",    input="Hello!",    max_output_tokens=1024) print(response.output_text)

Supported Parameters

API docs

Common6 params

modelinputinstructionsmax_output_tokensstreamtools

Extended5 params

reasoningtextstoreprevious_response_idmetadata

Cursor IDE Model IDs

Use these namespaced identifiers in Cursor IDE to avoid conflicts with built-in models.

codex-mini

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