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A July 2026 analysis reports that OpenAI has split its speech-to-text stack into workload-specific paths, with GPT-4o Transcribe positioned as the documented model for completed, uploaded audio recordings. The article explicitly states that OpenAI describes GPT-4o Transcribe as a GPT-4o-based speech-to-text model with The same piece notes that this split is consequential beyond naming: live transcription requires session management, buffering, turn detection, reconnection logic, and careful handling of transcript revisions, while file-based workflows need queues, durable job states, retries, speaker labels, timestamps, and predictab
