Best for
Best for developers in the OpenAI ecosystem who want one coding agent across the terminal, IDE, cloud and pull requests.
- Freelancers
- Small and mid-sized
- Enterprise
AI Code Comparison
OpenAI Codex vs. OpenCode
At a glance
At a glance
Best for
Best for developers who want an agent with no vendor lock-in, their own model keys, or a fully local setup.
- Freelancers
- Small and mid-sized
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | OpenAI Codex | OpenCode |
|---|---|---|
| Starting price | Included with ChatGPT Plus $20 / month Codex is bundled into ChatGPT, not sold separately. A free tier and Go ($8 per month) are limited; Plus is $20, Pro from $100 (up to $200 for higher limits), Business $25 per user monthly or $20 billed annually. Also available through the OpenAI API at token rates. | Free, MIT licence You bring your own provider keys and pay them directly. The optional OpenCode Zen gateway is pay as you go per million tokens and includes several free models. |
| Free trial | Free ChatGPT tier with basic Codex | Free open-source agent |
| Commercial use | Yes | Yes, MIT licence |
| Output | Autonomous coding across CLI, IDE, cloud and pull requests | Agentic coding in a terminal, a desktop app or an IDE |
| API | Yes, through the OpenAI API | Local server with a TypeScript SDK |
| Where it runs | Codex CLI in the terminal, an IDE extension, a desktop app, a cloud sandbox and automated pull request review, plus web and iOS | Terminal, a desktop app for macOS, Windows and Linux, and IDE extensions; open source under the MIT licence, installed through npm, Homebrew, Scoop, Chocolatey, Arch, Mise, Docker or a binary |
| Inline completions | No, Codex is an agent rather than an inline autocomplete | No, OpenCode is driven by prompts rather than by suggestions as you type; its language-server integration feeds diagnostics back to the agent instead of offering inline completions |
| Agent mode | Yes, it writes, runs and tests code and can delegate longer tasks to a cloud sandbox | Yes, an autonomous coding agent with several sessions running in parallel and the option to share a session |
| Model choice | No, OpenAI's own GPT models tuned for coding | Yes, more than 75 providers through Models.dev with your own keys, plus local models through Ollama, LM Studio or llama.cpp and any other OpenAI-compatible endpoint declared in opencode.json |
| Data control | Three sandbox modes, read-only, workspace-write and danger-full-access, with writable roots to widen the boundary without switching the sandbox off; network access asks for approval by default. Approval policies are untrusted, on-request or never, and a grant can be limited to one command or one session. In ChatGPT Work an administrator sets network access or an allowlist of hostnames, manages configuration and model availability, assigns workspace roles and reads audit events through a compliance API | Provider keys are stored locally in the user's own auth file rather than on a server, the project states it does not store your code or context data, and local models keep the work on your machine |
| Ecosystem fit | OpenAI and ChatGPT; one usage allowance shared across surfaces | Terminal, desktop app and IDE extensions, with language servers and MCP servers configurable; the optional OpenCode Zen gateway supplies models tested for coding agents |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), On-premise |
| Support | Not stated | Community forum |
| Onboarding | Documentation and knowledge base | Documentation and knowledge base |
| Company size | more entries Freelancers, Small and mid-sized, Enterprise | Freelancers, Small and mid-sized |
| Integrations | GitHub, Visual Studio Code, Cursor, Windsurf, Xcode, JetBrains IDEs | more entries Visual Studio Code, Cursor, Windsurf, VSCodium, GitHub, Ollama, LM Studio, llama.cpp |
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The short version
Key Differences
- Starting price OpenAI Codex Included with ChatGPT Plus $20 / month OpenCode Free, MIT licence
- Free trial OpenAI Codex Free ChatGPT tier with basic Codex OpenCode Free open-source agent
- Deployment OpenAI Codex Cloud (SaaS), Browser-based OpenCode Cloud (SaaS), On-premise
- Company size OpenAI Codex Freelancers, Small and mid-sized, Enterprise OpenCode Freelancers, Small and mid-sized
- Commercial use OpenAI Codex Yes OpenCode Yes, MIT licence
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
Strengths and Limitations
OpenAI Codex
Strengths
- One agent and one allowance across the terminal, IDE, cloud and pull requests
- Bundled into existing ChatGPT plans, easy to reach if you already pay for ChatGPT
- Cloud sandbox runs longer tasks asynchronously while you keep working
Limitations
- Tied to OpenAI's own models, with no third-party model choice
- Token-based credits mean heavy use can need extra purchases; the free and Go tiers are limited
OpenCode
Strengths
- MIT-licensed and free, with no restriction on commercial use
- More than 75 model providers plus fully local models, so no vendor lock-in
- One agent across terminal, desktop app and IDE
- Local server and TypeScript SDK for embedding the agent in other tools
Limitations
- You manage provider keys and pay model costs directly, so spend is harder to predict than a seat price
- Topping up OpenCode Zen credit adds a card processing fee of 4.4% plus $0.30 per transaction
- Zen model prices span a wide range, from $0.05 to $180 per million tokens depending on the model
Plans
Pricing
OpenAI Codex
- Free $0 Basic Codex capabilities.
- Go $8 Per month. Light use; excludes cloud task delegation.
- Plus $20 Per month. Includes Codex with cloud task delegation.
- Pro From $100 Per month for 5x limits, $200 per month for 20x limits.
- Business $25 Per user monthly, or $20 billed annually.
- Enterprise Custom Contact sales.
OpenCode
- OpenCode $0 Open source under the MIT licence. You bring your own provider keys and pay them directly.
- OpenCode Zen Pay as you go Billed per million tokens, from $0.05 per million input tokens on the cheapest model up to $180 per million output tokens on the most expensive. Several models are free. Credit auto-reloads by $20 when the balance falls below $5, and top-ups add a card processing fee of 4.4% plus $0.30. Workspace and per-member monthly spending caps are available.
What users say
Review Scores · opens after launch
OpenAI Codex
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
OpenCode
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
Where this comes from
Where this comes from
OpenAI Codex https://openai.com/codex/ · no check date recorded yet
OpenCode https://opencode.ai · checked against the official source on 2026-09-07
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.