Articles tagged "Codex"

cmux by Manaflow (YC S24) is a macOS-native terminal built specifically for running multiple AI agents in parallel. Powered by Ghostty's libghostty in Swift/AppKit, it offers vertical tabs, notification rings, an embedded browser, and a socket API. This column covers its features, install, use cases, competitive landscape, and considerations for enterprise adoption in Japan.

On June 2, 2026, OpenAI added a 'Sites' feature to Codex. Users can generate web apps, dashboards, and games inside Codex and instantly share an OpenAI-hosted URL within their workspace. The supported runtime is limited to Cloudflare Worker-compatible ES Modules, and the feature is currently available as a preview for Business and Enterprise plans only. There is no staging environment, and no official statement on public (anonymous) access. While ideal for internal PoC and departmental dashboards, it is too early to adopt as a foundation for customer-facing production services. The unusual structure of Vercel, Replit, and Lovable being both competitors and partners is drawing attention.

On May 29, 2026, OpenAI's Codex desktop app v26.527 brought **Computer Use (Codex driving any app by seeing, clicking, and typing on the screen) to Windows** for the first time — previously macOS-only. This column reads the official Changelog and Codex Computer Use docs as primary sources to cover the Windows-specific foreground-only execution constraint (unlike macOS's parallel background mode), the OS-level PowerShell sandbox, install via Microsoft Store and `winget`, the regional rollout excluding the EEA / UK / Switzerland at launch (**Japan is included**), pricing, comparisons with Anthropic Claude Computer Use, Claude Code, Cursor, and UiPath, and what this means for Japanese enterprises where Windows 11 dominates office endpoints.

OpenAI's Symphony, released in 2026 as an open-source spec, defines a "ticket-driven AI development" pattern: each Linear issue gets its own Codex agent in its own workspace and runs until the issue reaches a terminal state. This article walks through the spec's core ideas, the Elixir reference implementation, the polling / supervisor / workspace-isolation architecture, and the realistic operational considerations for adopting it — based on publicly available information.

Summary of OpenAI's GPT-5.5 released on April 23, 2026: improvements in coding, computer use, online research, and document/spreadsheet creation; rollout to ChatGPT Plus/Pro/Business/Enterprise and Codex; API availability; and safety updates — all based on official information.