OpenAI expands Codex and API at DevDay with security scans, Decisions API, Ultrafast

September 29, 2026 at 10:14 PM2 min

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OpenAI announced at its DevDay 2026 conference in San Francisco that Codex now supports reusable cloud environments and security scanning, while the Agents API gains Computer Use. The company also introduced a Decisions API and Ultrafast, a new high-speed tier priced at $500 per month. The updates include a revamped Codex CLI and a code review view in the ChatGPT desktop app.

Key Facts

OpenAI introduced a $500 per month ChatGPT Pro tier that includes the highest usage limits and access to Ultrafast mode.
Codex Security Cloud scans entire GitHub repositories on demand or on a schedule and tracks vulnerabilities from discovery to fix.
Ultrafast mode delivers responses up to eight times faster in Codex and is available with GPT-6 Astra.
OpenAI reopened its $200 per month ChatGPT tier with new usage limits.
Dots, OpenAI's new AI agents powered by GPT-6 Astra, are available now for Pro, Business Premium, and enterprise subscribers.

Codex Cloud Environments

Codex now works on a user's own computer, from a phone, or in the cloud from any device. Reusable development environments let teams share one configuration with approved settings and permissions to start tasks faster. Codex in the cloud is available on Plus, Pro, Business, Enterprise, Edu, and Healthcare plans.

Codex CLI and Desktop Review

The revamped Codex CLI lets users start and steer tasks by voice and includes a new "/agents" view for delegating multiple tasks. OpenAI improved prompt editing, session resuming, and Git worktree support in the CLI, which is available on all plans. The ChatGPT desktop app now has a code review view that summarizes changes, shows diffs, and lets developers ask Codex about potential problems before commenting on GitHub or GitLab pull requests. Automatic reviews let Codex perform a first pass in the cloud while the developer is away from their computer.

Security and New Models

Codex Security Cloud is aimed at security teams and scans entire GitHub repositories on demand or on a schedule, investigating findings and preparing fixes in the cloud. Users of the cloud version get access to Daybreak Blue models without separate identity verification; Daybreak Blue is the defensive tier of OpenAI's cybersecurity program. Codex Security Cloud is available for Pro, Business, Enterprise, and Edu on desktop and web. OpenAI released GPT-6.1 Sol, an update to its second-most-powerful model, which it says offers Astra-level intelligence at a fifth of the price.