Summary
Riley Brown demonstrates OpenAI’s newly released real-time voice feature inside Codex — what he calls the “Jarvis” mode — which allows spoken natural language to control all of Codex’s tools in real time, including email, browser, file operations, and code generation. The video shows the feature being used to sort customer support emails, draft responses, summarize complaints into a Google Doc, text it to a colleague, and annotate an Excalidraw whiteboard, all by voice.
The demo then moves into building a complete iOS app entirely through voice commands, with Codex generating the Swift code, running it in a simulator, and ultimately deploying to a physical device. Brown also tests controlling his desktop Codex session from the ChatGPT iPhone app, establishing a genuinely phone-to-computer remote workflow.
The video covers practical guardrails built into the system: Codex Voice will not autonomously send messages, spend money, or change permissions without explicit per-action approval, and these constraints cannot be overridden by skills or automations. Brown also notes limitations including the inability to switch models mid-session. For developers evaluating whether Codex’s voice mode is ready for real productivity work rather than demos, this video provides a useful, unfiltered stress test across a variety of workflows.
📺 Source: Riley Brown · Published July 24, 2026
🏷️ Format: Tutorial Demo
