feat(posts): add "How to maximize Codex usage"

Post: 2026-04-29-maximize-codex-usage-limit.md

Author: remarkablemark

_posts/2026/2026-04-29-maximize-codex-usage-limit.md

@@ -0,0 +1,50 @@
+---
+layout: post
+title: How to maximize Codex usage
+date: 2026-04-29 13:11:14
+excerpt: How to maximize your OpenAI Codex usage without going over the 5 hour window.
+categories: openai codex ai tui
+---
+
+This post goes over how to maximize your [OpenAI Codex usage](https://chatgpt.com/codex/settings/usage) without going over the 5 hour window.
+
+## Problem
+
+If you're constantly hitting your 5 hour usage limit on Codex:
+
+> ⚠ Heads up, you have less than 25% of your 5h limit left. Run /status for a breakdown.
+
+> ■ You've hit your usage limit. To get more access now, send a request to your admin or try again at Apr 20th, 2026 4:20 AM.
+
+Then try disabling fast mode and/or changing your model.
+
+## Fast Mode
+
+Disable fast mode temporarily in your current session:
+
+```
+/fast off
+```
+
+Or disable it permanently in `~/.codex/config.toml`:
+
+```toml
+[features]
+fast_mode = false
+```
+
+If you have `service_tier = "flex"` in `~/.codex/config.toml`, then delete it or replace it with another value:
+
+```toml
+service_tier = "flex"
+```
+
+## Model
+
+If you're working on simpler coding tasks (e.g., writing tests), choose a smaller, faster, and more cost-efficient model like `gpt-*-mini`:
+
+```
+/model
+```
+
+Now you should be able to use Codex more and for a longer period.