Kilocode vs OpenAI Codex: Features, Pricing and User Reviews 2026
Compare features, pricing, reviews, and more to make an informed decision
Kilocode
Kilocode is a free open source VS Code extension that gives developers AI-powered coding help with access to 400+ advanced models.
OpenAI Codex
OpenAI Codex is an AI-powered coding assistant that writes, tests, and reviews code in your development environment and cloud.
Kilocode
Kilocode is a free open source VS Code extension that gives developers AI-powered coding help with access to 400+ advanced models.
OpenAI Codex
OpenAI Codex is an AI-powered coding assistant that writes, tests, and reviews code in your development environment and cloud.
Kilocode
400+ AI models including Claude 4, GPT-5, Gemini 2.5 Pro
Multiple specialized work modes
Automatic code context detection
Multi-file editing with change tracking
MCP marketplace for custom tools
Browser automation capabilities
Terminal command execution
Codebase indexing with semantic search
Custom mode creation
Transparent usage-based pricing
Full open source code access
Local and cloud model 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
Kilocode
Kilocode offers a unique pricing structure designed for transparency and flexibility.
The Open Source plan is completely free forever. You get the full VS Code extension with no restrictions, access to the complete source code on GitHub, and the ability to bring your own API keys. The company does not train on your code and there is no vendor lock-in. You can buy AI tokens at the same price as OpenRouter charges.
The Teams plan costs $29 per user per month. It includes everything from the free plan plus centralized billing, a team management dashboard, usage analytics, role-based permissions, control over data collection, and priority support.
The Enterprise plan is $299 per user per month. It adds model and provider restrictions, audit logs, single sign-on support, service level agreements, and dedicated support channels.
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.
