Introducing SFX v3 for developers

ElevenLabs released SFX v3, a new sound effects model in its Sound Effects API that follows multi-instruction prompts more closely than SFX v2 and handles vocals and music better, available by setting model_id to eleven_text_to_sound_v3 on the POST /v1/sound-generation endpoint. The model picks sound length from the prompt, with duration_seconds for specific timing and prompt_influence (default 0.3) to tighten prompt adherence, while looping still requires eleven_text_to_sound_v2 with loop: true. The company describes v3 as an incremental update that is less likely to clip on high-frequency sounds and recommends A/B testing common prompts across both models since they share an endpoint.