GPT-4o Transcribe
OpenAI's hosted speech-to-text model — more accurate than Whisper via the API
Verdict
OpenAI's own successor to Whisper for API use — built on a GPT-4o-class audio model with materially lower word-error rates, especially on accented speech and noisy audio. Streaming supported. Whisper remains the right call when you need to self-host; this is the right call when you're already calling the API.
Other Speech & Audio
- AssemblyAIProduction
Transcription API with built-in audio intelligence features
- BarkStable
Open-source TTS model with emotions, music, and sound effects
- Coqui TTSExperimental
Open-source TTS toolkit for training and deploying custom voices
- DeepgramProduction
Real-time speech-to-text API with sub-300ms latency
- ElevenLabsProduction
Best-in-class text-to-speech with voice cloning and dubbing
- Kokoro TTSExperimental
Lightweight 82M-parameter open-source text-to-speech model