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Codex CLI

OpenAI · CLI

Codex CLI 0.156.0-alpha.14

0.156.0-alpha.12→0.156.0-alpha.14·September 21, 2026 at 4:16 AM UTC

Patch alpha release (0.156.0-alpha.12 → 0.156.0-alpha.14) with o1 model support, a session-ID environment variable rename, and internal model-catalog cleanup.

Changelog

  • [new] Adds the o1 model identifier to the supported model set.
  • [changed] Renames the session identity environment variable from CODEX_SESSION_ID to CODEX_SESSION_IDC.
  • [removed] Drops the CODEX_MCP_PROTOCOL_VERSION2025 environment variable.
  • [changed] Refactors app-server model listing into a dedicated model catalog module (replacing the previous models module).

Under the hood

  • Trims and reshapes several internal request/response and config payload types (including removal of unused agent close/interrupt/register shapes and related summary types).
  • Adjusts hook-handler, login, permissions, and process-identity enums as part of ongoing protocol and runtime cleanup.
  • Removes legacy default/managed-config payload variants that are no longer part of the shipped surface.

Upgrade notes

  • If you set CODEX_SESSION_ID in your environment or automation, switch to CODEX_SESSION_IDC.
  • Remove any remaining use of CODEX_MCP_PROTOCOL_VERSION2025; it is no longer recognized.

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Older release← 0.156.0-alpha.12Newer release→ 0.157.0-alpha.1
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