Whisper

OpenAI has added three voice intelligence features to its Realtime API: GPT-Realtime-2 with GPT-5-class reasoning for complex conversational requests, GPT-Realtime-Translate supporting 70 input languages and 13 output languages, and GPT-Realtime-Whisper for live speech-to-text transcription. Translation and transcription are billed by the minute, while GPT-Realtime-2 uses token-based pricing.

OpenAI's Whisper 1 automatic speech recognition model is now accessible through OpenRouter's API routing service. The model supports transcription and translation across 50+ languages from audio files up to 25 MB, priced at $0.006 per minute of audio.