Codex Mini Latest API Release Details
OpenAI released codex-mini-latest on May 15, 2025. This text model supports v1/responses and v1/chat/completions APIs for Codex CLI optimization.
Official Release Announcement
OpenAI announced the launch of codex-mini-latest on May 15, 2025. This date is recorded in the official changelog as the specific day the model was introduced to the API. The release is categorized as a feature update within the OpenAI developer documentation. The model accepts text inputs and generates text outputs. The source documentation does not provide data regarding context window size, maximum output tokens, or pricing structures.
- Model Name: codex-mini-latest
- Provider: OpenAI
- Input Modalities: Text
- Output Modalities: Text
- API Endpoints: v1/responses, v1/chat/completions
Documented Features and Limits
The primary stated characteristic of this release is that it is optimized for use with the Codex CLI. The source confirms access through the v1/responses and v1/chat/completions interfaces. The record indicates that open weights are not confirmed for this model. This status only records the absence of verified open weight availability; it does not establish whether local installation is impossible or if API access is mandatory. The documentation does not describe internal architecture, deployment requirements, or specific performance metrics. No comparisons to previous model iterations are provided in the source material.
Proposed Evaluation Procedure
Engineers can evaluate codex-mini-latest by conducting controlled tests using existing coding tasks. First, select a set of representative prompts currently handled by other tools. Second, send these prompts to the codex-mini-latest endpoint via either v1/responses or v1/chat/completions. Third, measure the relevance and accuracy of the generated text responses against project-specific criteria. Finally, compare these results against baseline outputs from current workflows to validate practical fit. This process allows for objective assessment without assuming inherent superiority over other models.
Primary sources
Frequently asked questions
Which API endpoints support codex-mini-latest?
The model is supported by the v1/responses and v1/chat/completions API endpoints. These are the specific interfaces listed in the official changelog for accessing the model.
Does the source confirm open weights availability?
No. The source records that open weights are not confirmed. It does not provide information on local installation options or self-hosting capabilities.