OpenAI Codex vs Gemini Code Assist

OCOpenAI Codex8.9Visit Gemini Code Assist6.3Visit

Higher score OC OpenAI Codex #5 in AI Coding Assistants 8.9/10 Paid ✓ 4 of 5 features Visit OpenAI Codex

vs

Gemini Code Assist #31 in AI Coding Assistants 6.3/10 Free plan Free plan✓ 5 of 5 features Explore Gemini Code

• OpenAI Codex fits best

  Teams delegating complete engineering tasks

• Gemini Code Assist fits best

  Google Cloud and multi-IDE developers

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Side by side

Feature	OCOpenAI Codex 8.9/10 Visit ↗	Gemini Code Assist 6.3/10 Visit ↗
At a glance
Editor score	8.9	6.3
Ranking	#5 in AI Coding Assistants	#31 in AI Coding Assistants
Best for	Teams delegating complete engineering tasks	Google Cloud and multi-IDE developers
Pricing model	Paid	Free plan + paid
Starting price	—	$19/user/mo
Free plan	—	✓ (best)
Free trial	—	—
Deployment	Cloud, Desktop	Cloud, Desktop
Platforms	Web, Windows, macOS, Linux	Web, Windows, macOS, Linux
Support	Docs · 24/7	Docs
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features OpenAI Codex 4/5 · Gemini Code Assist 5/5
Code completion	Not checked yet	✓ (best)
Chat assistance	✓	✓
Coding agent	✓	✓
Codebase indexing	✓	✓
Terminal access	✓	✓
Specs
Supported IDEs	Visual Studio Code; Cursor; Windsurf; Visual Studio Code Insiders; Xcode; JetBrains IDEs	VS Code; CLion; DataGrip; GoLand; IntelliJ IDEA; PhpStorm; PyCharm; Rider; RubyMine; WebStorm; Cloud Shell Editor; Cloud Workstations; Android Studio
Our review
Pros	Handles features, refactors, migrations, reviews, and code changes Supports terminal use, cloud delegation, and parallel worktrees Works with VS Code, Cursor, Windsurf, Xcode, and JetBrains IDEs	Free individual tier includes chat, completion, CLI, and agent mode Supports VS Code, JetBrains IDEs, Android Studio, and Cloud editors Adds codebase awareness, transformations, and GitHub pull-request review
Cons	No free plan Paid access is offered through ChatGPT plans and related surfaces IDE coverage is centered on the listed integrations	Business administration and security tools start with the Standard tier Private source-code customization is limited to Enterprise Annual pricing requires an annual commitment
Our verdict	OpenAI Codex is an AI coding agent for software developers and engineering teams. It works through ChatGPT, supported IDEs, and the terminal, helping with complete engineering tasks such as building features, refactoring code, migrating… Read the review →	Gemini Code Assist is Google's AI coding assistant for individual developers and development teams. It combines inline code completion and generation with conversational assistance based on opened-file context, local codebase awareness,… Read the review →

Strengths and trade-offs

• OpenAI Codex — where it wins

  • Handles features, refactors, migrations, reviews, and code changes
  • Supports terminal use, cloud delegation, and parallel worktrees
  • Works with VS Code, Cursor, Windsurf, Xcode, and JetBrains IDEs

  Where it doesn't

  • No free plan
  • Paid access is offered through ChatGPT plans and related surfaces
  • IDE coverage is centered on the listed integrations

• Gemini Code Assist — where it wins

  • Free individual tier includes chat, completion, CLI, and agent mode
  • Supports VS Code, JetBrains IDEs, Android Studio, and Cloud editors
  • Adds codebase awareness, transformations, and GitHub pull-request review

  Where it doesn't

  • Business administration and security tools start with the Standard tier
  • Private source-code customization is limited to Enterprise
  • Annual pricing requires an annual commitment

• OCOpenAI Codex8.9/10 · Paid

  A task-oriented coding agent for teams handling features, refactors, and migrations.

  Visit OpenAI CodexFull verdict →
• Gemini Code Assist6.3/10 · Free plan

  A broad AI coding assistant with free access and deeper Google Cloud capabilities.

  Explore Gemini CodeFull verdict →