Question 1

What is GPT-5.1 Codex Mini?

Accepted Answer

GPT-5.1 Codex mini is a smaller, more cost-effective, less-capable version of GPT-5.1-Codex. Pricing is based on the number of tokens used, or other metrics based on the model type. For tool-specific models, like search and computer use, there's a fee per tool call.

Question 2

What is the difference between GPT-5.1 and 5.1 Codex?

Accepted Answer

OpenAI offers two specialized models for coding tasks: GPT-5.1: A general-purpose reasoning model. GPT-5.1-Codex: A specialized coding model optimized for "long-running, agentic coding tasks."

Question 3

What is GPT-5.1 Codex?

Accepted Answer

What is GPT-5.1-Codex? GPT-5.1 Codex is a specialized version of GPT-5.1, built for long-running, agentic coding tasks rather than just snippet autocompletion. It is purpose-built for real software engineering and agentic workflows, which makes it the perfect engine behind our Issue-to-Plan automation workflow.

Question 4

What is OpenAI codex used for?

Accepted Answer

Information about What is OpenAI codex used for for OpenAI: GPT-5.1-Codex-Mini.

Question 5

Can I use OpenAI codex for free?

Accepted Answer

Information about Can I use OpenAI codex for free for OpenAI: GPT-5.1-Codex-Mini.

OpenAI: GPT-5.1-Codex-Mini

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