GPT‑5.4 used in Xcode workflows
Paul Solt shared a detailed workflow using GPT‑5.4 and Codex to plan, prompt, debug and collaborate as agents inside Xcode, while a SceneKit + VRMKit avatar demo was "vibe coded" with GPT‑5.4 after Xcode intelligence fell short shown. Those posts show developers are integrating powerful LLM tooling into real macOS/iOS pipelines and creative prototyping.
Paul Solt has an active series of hands‑on Codex/Xcode walkthroughs on his YouTube channel (example: “How I use Codex GPT 5.2 with Xcode (My Complete Workflow)”), and he maintains an AIWorkflow repo that documents agent-driven dev patterns for GPT/Codex pairing. (youtube.com) OpenAI publicly released GPT‑5.4 on March 5, 2026, and the release notes state GPT‑5.4 (and GPT‑5.4 Pro) are available in ChatGPT, the API and Codex with native computer‑use capabilities and up to ~1.05M tokens of context. (openai.com) Codex’s CLI and IDE tooling explicitly expose agent features Paul demonstrates — /model switching between GPT‑5.4 and Codex variants, image/screenshot inputs, local code review, sandboxed execution, and multi‑agent workflows that can edit, run, and validate builds from the IDE or terminal. (developers.openai.com) The SceneKit + VRMKit avatar demo links to an active VRMKit project (VRMKit 0.4.4 on CocoaPods and the tattn/VRMKit GitHub) while Apple’s docs now mark SceneKit deprecated and recommend RealityKit for new work, a detail that explains why developers are combining third‑party renderers with LLM‑driven prototyping. (cocoapods.org)
