Windsurf (formerly Codeium)
Windsurf (Cognition AI)
FreemiumOpenAI Codex CLI
OpenAI
FreemiumWindsurf (formerly Codeium) vs OpenAI Codex CLI: Full Comparison (2026)
Windsurf (formerly Codeium) is ai-first ide with agentic cascade engine - rebranded from codeium. OpenAI Codex CLI is openai's open-source terminal coding agent powered by its reasoning models. Use the breakdown below to find the right fit for your needs.
This page presents factual information sourced from publicly available vendor documentation and product pages. AIHub does not endorse either product. The right tool depends on your specific use case, team, and requirements — we recommend evaluating both tools directly before making a decision.
Side-by-Side Overview
Pricing Model
Windsurf (formerly Codeium)
FreemiumOpenAI Codex CLI
FreemiumAPI Access
Windsurf (formerly Codeium)
Not availableOpenAI Codex CLI
AvailablePlatforms
Windsurf (formerly Codeium)
WebOpenAI Codex CLI
macOS, Linux, Windows (WSL)Integrations
Windsurf (formerly Codeium)
—OpenAI Codex CLI
5 integrationsVendor
Windsurf (formerly Codeium)
Windsurf (Cognition AI)OpenAI Codex CLI
OpenAICategory
Windsurf (formerly Codeium)
Code AssistanceOpenAI Codex CLI
Code AssistanceLaunch
Windsurf (formerly Codeium)
—OpenAI Codex CLI
Apr 16, 2025| Feature | Windsurf (formerly Codeium) | OpenAI Codex CLI |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| API Access | Not available | Available |
| Platforms | Web | macOS, Linux, Windows (WSL) |
| Integrations | — | 5 integrations |
| Vendor | Windsurf (Cognition AI) | OpenAI |
| Category | Code Assistance | Code Assistance |
| Launch | — | Apr 16, 2025 |
About Windsurf (formerly Codeium)
Codeium rebranded to Windsurf in late 2024, launching an AI-first IDE (fork of VS Code) with Cascade - an agentic engine that can autonomously plan and execute multi-step coding tasks. Acquired by Cognition AI (makers of Devin) in May 2025 for $3B.
Designed For
- Code completion
- Agentic coding
- Refactoring
- Multi-file edits
About OpenAI Codex CLI
Codex CLI is OpenAI's open-source command-line coding agent that runs in your terminal and edits code, runs commands, and executes tests in a sandbox on your local machine. Powered by OpenAI's codex-optimized reasoning models, it reads your repository, plans multi-step changes, and applies them with approval controls. It complements the cloud-based Codex agent, giving developers a local, scriptable, terminal-native agentic coding workflow.
Designed For
- Terminal-based coding
- Multi-file refactoring
- Test generation and fixing
- Scripted automation of code tasks
Strengths & Limitations
Windsurf (formerly Codeium)
Strengths
- Cascade agentic engine
- Free tier available
- 70+ languages
- VS Code compatible
Limitations
- New product, less mature than Cursor
- Cognition acquisition uncertainty
OpenAI Codex CLI
Strengths
- Open-source (Apache 2.0)
- Runs locally in the terminal
- Sandboxed execution with approval modes
- Included with ChatGPT Plus/Pro/Business plans
- Scriptable and CI-friendly
Limitations
- Terminal-first (no rich GUI)
- Heavy usage can hit plan limits
- Requires OpenAI account/API
- Newer than some rivals
Frequently Asked Questions
What is the difference between Windsurf (formerly Codeium) and OpenAI Codex CLI?
Windsurf (formerly Codeium) is ai-first ide with agentic cascade engine - rebranded from codeium, while OpenAI Codex CLI is openai's open-source terminal coding agent powered by its reasoning models. Windsurf (formerly Codeium) is designed for Code Assistance; OpenAI Codex CLI is designed for Professional developers, Terminal power users. The right fit depends on your specific requirements.
How do the pricing models compare?
Windsurf (formerly Codeium) is available under a Freemium model. OpenAI Codex CLI is available under a Freemium model. OpenAI Codex CLI's entry tier starts at $20/mo. Always verify pricing on each vendor's official website as it may change.
What integrations does each tool support?
Windsurf (formerly Codeium) integrates with various tools. OpenAI Codex CLI integrates with GitHub, MCP servers, Terminal tools, ChatGPT sign-in. Check each vendor's documentation for the full and current list.
How do I choose between Windsurf (formerly Codeium) and OpenAI Codex CLI?
Consider your team's technical requirements, budget, existing tooling, and use case before deciding. We recommend signing up for free trials or demos of both tools where available, and consulting each vendor's documentation. AIHub provides this comparison for informational purposes only.
Feature Snapshot
Explore Further
Windsurf (formerly Codeium) full detailsOpenAI Codex CLI full detailsWindsurf (formerly Codeium) official siteOpenAI Codex CLI official siteRelated Comparisons
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Data sourced from public vendor documentation. Pricing, features, and availability may change. Always verify on official vendor websites before making purchasing decisions. AIHub is not affiliated with any of the listed vendors.