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GPT-Realtime-2.1-mini API Released

·2026.07.08 09:00

Key point

Alongside the release of GPT-5-Codex-Mini, OpenAI announced Codex's Skills feature and Responses API updates.

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Details

OpenAI has newly introduced GPT-5-Codex-Mini. This model offers about 4x more usage than the existing GPT-5-Codex, and is a compact version with improved cost efficiency. It is currently available in the CLI and IDE extensions, with API support coming soon.

Codex has added a new Skills feature. Skills are reusable bundles containing instructions, scripts, and resources, which can be invoked directly via the $.skill-name format or automatically selected by Codex based on the prompt. This is managed through a folder structure that follows the agentskills.io standard.

Two major updates have been applied to the Responses API:

  • Connectors: Context from external services such as Gmail, Google Calendar, Dropbox, and Teams can be retrieved with a single API call.
  • Conversations: Per-user chat threads can be maintained without building a separate database.

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