Codex Tip: Switching Reasoning Levels Often Costs More Tokens
eyishazyer · x · 2026-08-17
If you frequently switch between reasoning levels like "Medium" and "High" while working with Codex, you should reconsider.
- Reason: Changing the reasoning level invalidates the context cache.
- Consequence: The entire context window must be regenerated, costing significantly more tokens.
Related event: Frequent Codex Reasoning-Level Switching Kills Context Cache(2 posts)→
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