OpenAI Codex vs Tabnine: Features, Pricing and User Reviews 2026
Compare features, pricing, reviews, and more to make an informed decision
OpenAI Codex
OpenAI Codex is an AI-powered coding assistant that writes, tests, and reviews code in your development environment and cloud.
Tabnine
Tabnine is an AI-powered code assistant that helps developers write code faster with smart completions and chat support.
OpenAI Codex
OpenAI Codex is an AI-powered coding assistant that writes, tests, and reviews code in your development environment and cloud.
Tabnine
Tabnine is an AI-powered code assistant that helps developers write code faster with smart completions and chat support.
OpenAI Codex
Writes code, fixes bugs, and adds tests
Works in terminal, IDE, cloud, and mobile
Automatic pull request reviews on GitHub
Runs multiple tasks at the same time
Provides detailed logs and test results
Supports custom setup through AGENTS.md files
Secure isolated environment for each task
Integrates with VS Code, Cursor, and Windsurf
Background cloud processing
Mobile app support for task management
Tabnine
AI-powered code completions for 600+ languages
Chat interface with natural language commands
Test generation and documentation creation
Code explanation and debugging assistance
Multiple AI models including GPT-4 and Claude
Private and secure deployment options
Integration with major Git platforms
Team collaboration with shared learning
Code review with custom validation rules
Works in VS Code, JetBrains, Eclipse, Visual Studio
OpenAI Codex
OpenAI Codex is included as part of your ChatGPT subscription and does not require a separate purchase. It is available across multiple plan levels, each with different usage limits.
ChatGPT Plus costs $20 per month and includes Codex with usage limits that allow about 30 to 150 local messages or 5 to 40 cloud tasks every 5 hours. This plan is best for developers working on a few focused coding sessions each week.
ChatGPT Pro costs $200 per month and provides significantly higher limits, allowing about 300 to 1,500 local messages or 50 to 400 cloud tasks every 5 hours. This plan suits developers who need Codex throughout their full workday across multiple projects.
Business, Education, and Enterprise plans include the same per-seat limits as Plus. However, plans with flexible pricing can purchase additional credits to go beyond included limits. For automatic pull request reviews on all repositories, flexible pricing is required.
Tabnine
Tabnine offers flexible pricing plans to suit different needs. The Dev Preview plan is free for qualified users, providing basic AI code completions and chat features across major IDEs. This free tier is perfect for individual developers who want to try AI-assisted coding.
The Dev plan costs $9 per month with a 14-day free trial. It includes AI chat for the full software development process, AI agents for autonomous code generation, access to leading AI models from multiple providers, and basic code context awareness. You also get integration with Jira Cloud and ticket-based support during business hours.
For businesses, the Enterprise plan is $39 per user per month on an annual subscription. This adds advanced AI agents, private deployment options including self-hosted and air-gapped environments, unlimited repository connections, custom AI validation rules, model flexibility with third-party and custom models, code provenance tracking, priority support, and comprehensive admin tools.