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Calling OpenAI models via Codex

·2026.04.24 04:22

Key point

llm-openai-via-codex 0.1a0, which calls OpenAI models using an existing Codex subscription, has been released.

Details

llm-openai-via-codex 0.1a0 has been released. It's a release that lets LLM send API calls to OpenAI models by leveraging existing Codex CLI credentials.

The key point is that it uses your existing Codex subscription as is. Simon Willison introduced this behavior in a post on April 23, 2026, and connected it to explanations related to GPT-5.5 as well.

llmopenaiapicodexclicodex-cliopenai-api
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