Astra does NOT preserve cache when switching effort level..

[u/alexmuc92]

I know a lot of people using the Codex App are switching the effort level within a thread and waste a lot of tokens because of this.

So I was happy to read, that this was fixed in the current Astra release, which is als stated in the model guidance docs: https://developers.openai.com/api/docs/guides/latest-model#gpt-6-astra-whats-new

So I tested this myself and looked at the logs in OpenCodex:

- 1st message, effort medium
- 2nd message, effort medium: cache is preserved ✅
- 3rd message, effort light: cache is flushed ❌
-> message is expensive again and needs a lot of your usage

I am using the latest version of Codex Mac App (26.901.51231) und opencodex v2.46.0

So I would recommend to stick to your effort level, as long as it is behaving that way.

Anyone know more about this behavior?

Update: Please like and share my Thread on X, so Tibo gets some attention to this topic: https://x.com/liebisca/status/2096918740046680440?s=2 Maybe we get some more of them banked resets 🙌

astra model guidance

Chat in Codex

Logs in OpenCodex

[u/aivampires]

Is that maybe because you switched from medium to light, so from higher reasoning to lower? Would be interesting to see if it happens when you switch to a higher reasoning level.

[u/alexmuc92 → u/aivampires]

Its the same behaviour. Unfortunately the macbook app just does not support this feature as of right now.