OpenAI Codex CLI v0.139.0: Web Search in Code Mode and MCP Schema Fixes
OpenAI
Codex CLI v0.139.0 (June 9, 2026) allows code mode to call standalone web search directly and receive plaintext results. Improved MCP tool schema preservation for complex tool inputs. The codex doctor diagnostic command was improved. A pre-release v0.140.0-alpha.2 also dropped June 10. Earlier v0.137.0 (June 4) added F13-F24 keybindings, monthly credit limit display for enterprise, and multi-agent v2 improvements.
Why it matters
Web search directly inside code mode closes a major workflow gap — developers can have Codex look up documentation or changelogs without switching context. MCP schema improvements help with complex tool-call pipelines.
Importance: 2/5
Minor update with useful web-search integration; follows v0.138.0 from June 8.
Sources
official
Codex CLI Releases — GitHub