OpenAI Codex vs GPT-5.4 mini
A side-by-side comparison to help you choose the right tool.
86
OpenAI Codex scores higher overall (86/100)
But the best choice depends on your specific needs. Compare below.
| Feature | OpenAI Codex | GPT-5.4 mini |
|---|---|---|
| Our score | 86 | 85 |
| Pricing | Access depends on OpenAI product plan or API usage; advanced agent access is concentrated in higher tiers and previews. | Usage-based via OpenAI API pricing and model availability in supported endpoints. |
| Free plan | Yes | No |
| Best for | Developers who want AI to work more directly on real code tasks, Teams exploring terminal-first coding agents, Engineers already invested in OpenAI's ecosystem | API builders who need modern OpenAI features at lower cost than top-tier models, Teams experimenting with tool search or computer-use workflows, Developers serving many requests where throughput matters |
| Platforms | web, mac, windows, linux, api | api |
| API | Yes | Yes |
| Languages | en | en |
| Pros |
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| Cons |
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| Visit site | Visit site |
- Pricing
- Access depends on OpenAI product plan or API usage; advanced agent access is concentrated in higher tiers and previews.
- Free plan
- Yes
- Best for
- Developers who want AI to work more directly on real code tasks, Teams exploring terminal-first coding agents, Engineers already invested in OpenAI's ecosystem
- Platforms
- web, mac, windows, linux, api
- API
- Yes
- Languages
- en
- Pricing
- Usage-based via OpenAI API pricing and model availability in supported endpoints.
- Free plan
- No
- Best for
- API builders who need modern OpenAI features at lower cost than top-tier models, Teams experimenting with tool search or computer-use workflows, Developers serving many requests where throughput matters
- Platforms
- api
- API
- Yes
- Languages
- en
86Choose OpenAI Codex if:
- You are Developers who want AI to work more directly on real code tasks
- You are Teams exploring terminal-first coding agents
- You are Engineers already invested in OpenAI's ecosystem
- You want to start free
85Choose GPT-5.4 mini if:
- You are API builders who need modern OpenAI features at lower cost than top-tier models
- You are Teams experimenting with tool search or computer-use workflows
- You are Developers serving many requests where throughput matters
FAQ
- What is the difference between OpenAI Codex and GPT-5.4 mini?
- OpenAI Codex is openai's coding agent experience for writing, editing, understanding, and operating on codebases with a more agentic workflow. GPT-5.4 mini is a compact gpt-5.4-class model optimized for high-volume api workloads, including newer tool-oriented workflows.
- Which is cheaper, OpenAI Codex or GPT-5.4 mini?
- OpenAI Codex: Access depends on OpenAI product plan or API usage; advanced agent access is concentrated in higher tiers and previews.. GPT-5.4 mini: Usage-based via OpenAI API pricing and model availability in supported endpoints.. OpenAI Codex has a free plan.
- Who is OpenAI Codex best for?
- OpenAI Codex is best for Developers who want AI to work more directly on real code tasks, Teams exploring terminal-first coding agents, Engineers already invested in OpenAI's ecosystem.
- Who is GPT-5.4 mini best for?
- GPT-5.4 mini is best for API builders who need modern OpenAI features at lower cost than top-tier models, Teams experimenting with tool search or computer-use workflows, Developers serving many requests where throughput matters.