Side by side
Gemini Code Assist vs OpenAI Codex
A fact-based comparison built only from each tool's verified directory profile — pricing summaries, plan availability, platforms, and stated strengths and limitations. No rankings, no sponsored placement.
| Criterion | Gemini Code Assist | OpenAI Codex |
|---|---|---|
| Category | AI Coding Assistants | AI Coding Assistants |
| In one sentence | Google's IDE coding assistant, now being retired in favour of the Antigravity family of products. | OpenAI's coding agent, included with ChatGPT plans and usable with an API key. |
| Problem it solves | It helped developers write and understand code with Gemini models inside their IDE. | Engineering backlogs contain many well-defined coding tasks. Codex takes those tasks on so developers can focus on review and design. |
| Free plan | No | Yes |
| Developer API | No | Yes — docs |
| Open source | No | No |
| Platforms | VS Code, JetBrains IDEs | Desktop app, CLI, IDE extension, Web, iOS |
| Pricing (summary) | New Standard and Enterprise subscriptions can no longer be purchased from October 9, 2026, and consumer access ended June 18, 2026. Google recommends Antigravity (included in Gemini Enterprise) as the successor. Checked 2026-10-19 | Codex is included in ChatGPT Free, Go ($8), Plus ($20), Pro (from $100), Business ($25 per user monthly or $20 annually) and Enterprise/Edu plans. Usage limits rise with the plan. API-key usage is billed separately at standard API token rates. Checked 2026-10-19 |
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How to choose
Both profiles link to the vendors' official pricing — plan details change often, so verify there before buying. Pick based on the criterion rows above that matter to your workflow, not on rankings: we don't rank tools, because the right choice depends on your needs.