Lenny's Newsletter
7/22/2026
The original title is "Computer and browser use in Codex (5 real examples)"
Original: Computer and browser use in Codex (5 real examples)
Short summary
Lenny demonstrates five real-world use cases for browser and computer use within Codex, including QA-testing his own app, managing LinkedIn activity, and shopping for a Hawaii trip. He also shares an 'under-prompting' technique that pushes frontier models to work harder with less instruction. The content is a video walkthrough with practical, hands-on examples.
- •Five real examples of Codex browser/computer use: app QA, LinkedIn management, Hawaii shopping
- •Shares an under-prompting trick to make frontier models work harder
- •Video format with hands-on demonstrations
Generated with AI, which can make mistakes.
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