Descriptions:
Alex Finn puts the newly released ChatGPT 5.5 through an extended real-world comparison against Claude Opus 4.7 and Claude Code, using the Codex desktop application as the primary interface. The video identifies four key improvements in 5.5 over its predecessor: more decisive action-taking, reduced verbosity, a warmer interaction style, and significantly cleaner code output — Finn reports near-zero bugs across days of intensive testing across hundreds of prompts.
The centerpiece of the video is a detailed tour of the Codex desktop app, covering multi-project organization, a built-in live browser with annotation tools for directly editing a running application, and computer-use capabilities that let the model autonomously click through and test an app without human input. Finn demonstrates how annotation mode replaces traditional back-and-forth chat prompting, letting users point at UI elements and issue changes directly within the live preview — a meaningfully different interaction model from Claude Code’s terminal-first approach.
The video closes with a direct verdict on which stack Finn recommends for different builder profiles, making it a practical decision-making resource for developers choosing between the ChatGPT 5.5 plus Codex ecosystem and Anthropic’s Claude Code. Viewers will leave with a working understanding of the Codex app’s core features and a specific advanced workflow applicable to both beginner and experienced AI-assisted development.
📺 Source: Alex Finn · Published April 25, 2026
🏷️ Format: Comparison
