# OpenAI > Offers the TTS-1 models and speech output in its Realtime API. ## Key Information - Provider: OpenAI - Models listed: 4 - Appears on: 2 of 3 boards ## Models - TTS-1 HD: Score 53.0, $30.0, 1/3 boards - TTS-1: Score 49.0, $15.0, 1/3 boards - GPT-Realtime-2: Score 42.0, $191.6, 1/3 boards - gpt-4o-mini-tts: Score 1.0, —, 1/3 boards ## Links - Provider page: https://texttospeech.com/providers/openai - All providers: https://texttospeech.com/providers - Leaderboard: https://texttospeech.com/