What problem does it solve? Developers building with OpenAI APIs often rely on outdated or unofficial information when choosing models, configuring APIs, or planning upgrades. This Skill grounds every answer in current official OpenAI developer documentation, retrieved through the developers.openai.com MCP server, so guidance on models, APIs, and GPT-5.4 migrations stays accurate and cited. ## Core Features & Use Cases - Authoritative docs lookup: Searches and fetches official OpenAI documentation via MCP tools, with web search restricted to official OpenAI domains only as a fallback. - Model selection guidance: Loads a curated model map covering reasoning, coding, image, audio, realtime, and embedding models, always verified against current docs. - GPT-5.4 upgrade planning: Provides structured upgrade workflows that inventory model usage, classify upgrade paths (model string only, light prompt rewrite, or blocked), and recommend targeted prompt blocks. - Use Case: A team upgrading a tool-heavy support agent from GPT-4.1 to GPT-5.4 uses this Skill to get a per-usage-site recommendation covering the model string, starting reasoning effort, prompt additions like verification loops, and a no-code compatibility check. ## Quick Start Ask the assistant to look up the official OpenAI docs for choosing the best model for a realtime voice application and cite the sources.