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ToolsThe story, in brief

Unrolling the Codex agent loop

OpenAI's Codex CLI agent loop is live—here's how it orchestrates models and tools at scale.

Reporting by OpenAI Blog 1 min brief
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The KeyNews take

Why it matters

OpenAI is shipping agent infrastructure (Codex CLI) that lets developers compose models, tools, and prompts into production workflows. This is a foundational product drop that moves agents from research/demo into developer tooling.

The key facts

8 to know

  1. Codex CLI orchestrates models, tools, prompts, and performance

  2. Uses Responses API for agent loop management

  3. Technical deep-dive format suggests production-ready tooling

  4. Published Jan 23 2026 — recent/current release

  5. Codex agent loop orchestrates models, tools, prompts, and performance

  6. Responses API enables structured agent coordination

  7. Codex CLI product ship (Jan 2026)

  8. Technical focus on agent reliability and tool integration

Go to the source

OpenAI Blogopenai.com

Publisher excerpt: A technical deep dive into the Codex agent loop, explaining how Codex CLI orchestrates models, tools, prompts, and performance using the Responses API.
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