Verification register AI & Agents
Living definition
What is OpenAI Codex (GPT-5.5)?
AI Coding & Software Agents AI & Agents
- As of
- 2026-10-01
- Revision
- 2026-10-06.1
- Method
- v1.4.0
Definition
The term, in context
AI-assisted draft · approved dataset
OpenAI Codex (GPT-5.5) is OpenAI’s coding agent, built on the GPT-5.5 model, that reads a codebase and writes, edits, and tests code changes across multiple files.
Live readiness status
Status as of the current dateline
AI-assisted assembly · derived results
As of 2026-10-01, verified readiness is 45 (claimed 65, reported 55, gap 20) — Strong evidence strength; current signals suggest Use for supervised coding while preparing a supported-model migration.
The readiness fact belongs to the canonical Readiness Verdict for OpenAI Codex (GPT-5.5).
Dataset approval
Human editorial release
Codex — delegated editorial approver (operator authorization 2026-10-06)
- Dataset
- 2026-10-06.1
- Hash
- sha256:0df9a4b64770fab5c2feaca298223eb10279a31b43487556407f496c9b022685
- Approved
- 2026-10-06