Choose Gemini Code Assist if you need
- JetBrains. We haven't found it on Codex's website.
- Integration with Firebase, BigQuery or Apigee. We haven't found them on Codex's website.
- ISO 27001. We haven't found it on Codex's website.
Side by side, from each tool's own website. A tool's rating shows once it has 3 reviews.
From each tool's own website, checked on the dates below, and from published reviews.
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.

Nobody has reviewed Gemini Code Assist yet. Its rating shows once it has 3 reviews.
Review Gemini Code AssistNobody has reviewed Codex yet. Its rating shows once it has 3 reviews.
Review CodexFrom the platforms and integrations each website lists.
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Gemini Code Assist and Codex yet.
Your review makes this comparison better for the next person. Review Gemini Code Assist or review Codex.
Gemini Code Assist: Facts from codeassist.google, checked October 20, 2026. Sources: codeassist.google/products/business.
Codex: Facts from openai.com, checked October 20, 2026. Sources: learn.chatgpt.com/docs/pricing, learn.chatgpt.com/docs/codex/cli, learn.chatgpt.com/docs/codex/ide, learn.chatgpt.com/docs/quickstart, learn.chatgpt.com/docs/codex-sdk.
Prices change, so confirm on their sites.