By Jon Lamb · Last updated
Claude vs. Codex for Mendix
Codex with GPT-6 Astra is better for Mendix than Claude Fable 5.1, and it’s not close.
| Category | CodexGPT-6 Astra | ClaudeFable 5.1 | Notes |
|---|---|---|---|
| Frontier Intelligence | My pick | My pick | Both are frontier intelligence. Roughly equivalent in my mind. |
| Computer use | My pick | — | When the Mendix MCP server chokes on a big page or can’t write a Nanoflow, Codex can use the UI to get it done. |
| Speed | My pick | — | In my experience, there’s less waiting around with Codex, and the whole task generally gets done sooner. |
| Value for money | My pick | — | My rough impression is that I get about three times as much out of Astra for the same money. |
| Usage limits | My pick | — | OpenAI seems to reset my usage limits all the time. With Claude, a weekly limit feels like an actual weekly limit. There’s even a tracker for the reset announcements. |