AI choices
What each AI choice gets
cix gives every AI choice the same method. Some things aren't available on every choice yet; this page shows exactly which.
Checked against the cix app's own checklist on 9 October 2026. The checklist covers what cix gives each AI, not how each model behaves.
| What the AI gets | ChatGPT plan (Codex) | OpenAI API key | Anthropic API key |
|---|---|---|---|
| The cix way of working, sized to the job | Available | Available | Available |
| Reads and edits your code through cix (edits ask first) | Available | Available | Available |
| Reads your saved research, designs, plans and ideas | Available | Available | Available |
| Saves new research, designs and plans | Available | Available | Available |
| Keeps research and plans up to date (adds steps and notes, closes findings) | Available | Not available · by design | Available |
| Knows the project's state when a conversation starts | Available | Known gap | Available |
| Remembers what you told it to keep, across conversations | Available | Available | Available |
| Works in its own copy of your project, and across several repositories | Available | Available | Available |
| Runs a plan step on its own, then its saved checks | Available | Not available · by design | Available |
| Starts helper agents you oversee | Available | Not available · by design | Available |
| Asks before running commands or editing files | Available | Available | Available |
| Never reads your sign-in files | Available | Available | Available |
| Keeps secret files (.env, keys) away from the AI | Known gap | Available | Available |
| A spending limit on each conversation | Not needed · plan, not pay-per-use | Available | Available |
| Stop really stops the work | Available | Available | Available |
What the words mean
Available cix gives this to the AI.
Not available · by design We chose not to offer it on this choice yet.
Known gap It should work, doesn't yet, and is on our list.
The two gaps
On a ChatGPT plan, Codex reads files with its own tools, so cix can't hold back secret files such as .env. Keep secrets out of the project folder, or use an API key.
With an OpenAI API key, the AI doesn't yet get cix's summary of the project's state when a conversation starts. It can still look things up.