How to Build a Real-Time Phone Call Transcription Pipeline with Telnyx and OpenAI Whisper

This article describes a real-time phone call transcription pipeline using Telnyx and OpenAI Whisper. The pipeline initiates an outbound call, records it, transcribes the audio with OpenAI, generates a response with GPT-4, and plays it back through Telnyx TTS. This is a demo example, not production code, and requires hardening before running at scale. The full code is available on GitHub.