GPT-5.1 Codex Mini

openai/gpt-5.1-codex-mini

codingagenticreasoningaffordablecodex

Input price

159.8 RODI/M

~ 0.25 USD/M

Output price

1278.4 RODI/M

~ 2 USD/M

Context

400K

Max output

128K

Input:textimage

Output:text

Providers & pricing

Provider	Input	Output	Free tier
Azure Default	159.8 RODI/M~0.250 USD/M	1278.4 RODI/M	—
OpenAI	159.8 RODI/M~0.250 USD/M	1278.4 RODI/M	—

Rate	RODI	USD (ref.)	Unit
In	159.8	~ 0.250	USD/M · RODI/M
Out	1278.4	~ 2.00	USD/M · RODI/M
Cached	16.0	~ 0.0250	USD/M · RODI/M

RODI prices include RodiumAi markup and upstream fees. USD figures are wholesale reference rates.

Streaming

Tool calling

Vision

JSON mode

Reasoning

Smaller, cost-efficient GPT-5.1 Codex for agentic coding via the Responses API.

Use the canonical model slug in your chat completion requests.

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