OpenAI's Codex Remote goes GA, retires GPT-4.5 and o3 by 2026
Codex Remote now works from mobile; two major models phased out by mid-2026.
OpenAI announced today that Codex Remote is now generally available to all ChatGPT users. The feature, previously in preview, allows developers to initiate or resume code execution sessions on a connected Mac or Windows host directly from the ChatGPT mobile app. This enables seamless remote development workflows without requiring a local IDE, making it easier to edit, test, and debug code on the go. Codex Remote supports all ChatGPT plans, including Free, Plus, Pro, and Team tiers, though session limits may vary.
In a parallel move, OpenAI confirmed the retirement of two legacy models: GPT-4.5 will be removed from ChatGPT on June 27, 2026, and the o3 reasoning model will be removed on August 26, 2026, for paid users. The company cites a strategic shift toward more advanced, efficient models as the primary reason. Users relying on these models for specific tasks are advised to migrate to alternatives like GPT-4o or o4-mini before the cutoff dates. These changes reflect OpenAI's accelerating model lifecycle, with older versions being phased out faster than before.
- Codex Remote is now generally available across all ChatGPT plans, enabling remote coding from the mobile app on connected Mac/Windows hosts.
- GPT-4.5 will be retired from ChatGPT on June 27, 2026, for all users; o3 model will be retired on August 26, 2026, for paid users.
- OpenAI is refocusing on newer, more capable models, urging users to transition to GPT-4o or o4-mini before the retirement dates.
Why It Matters
Codex Remote empowers mobile-first coding, while model retirements signal faster cycles—users must adapt or lose access.