Side by side
JetBrains AI 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 | JetBrains AI | OpenAI Codex |
|---|---|---|
| Category | AI Coding Assistants | AI Coding Assistants |
| In one sentence | AI Assistant, the Junie agent and JetBrains Air for building software with agents in JetBrains IDEs. | OpenAI's coding agent, included with ChatGPT plans and usable with an API key. |
| Problem it solves | JetBrains users want AI help without leaving their IDE. JetBrains AI integrates assistance and agents natively. | Engineering backlogs contain many well-defined coding tasks. Codex takes those tasks on so developers can focus on review and design. |
| Free plan | Yes | Yes |
| Developer API | No | Yes — docs |
| Open source | No | No |
| Platforms | IntelliJ IDEA, PyCharm, WebStorm, Other JetBrains IDEs, Air (IDE, web, CLI, mobile) | Desktop app, CLI, IDE extension, Web, iOS |
| Pricing (summary) | AI Free is included with eligible JetBrains IDE licences. AI Pro costs $10 per month ($100 per year) with 10 credits and AI Ultimate $30 per month ($300 per year) with 35 credits for individuals. AI Enterprise is for organisations via IDE Services. 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
Every profile links to the vendor's 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.