{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/hume-evi/","md":"https://postcutoff.com/m/hume-evi/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"hume-evi","name":"Hume EVI 3 / EVI 4 mini (speech-to-speech)","org":"Hume AI","family":"EVI","released":"2025-05-29","status":"current","type":"audio/speech","modality_in":["audio","text"],"modality_out":["audio","text"],"open_weights":false,"model_license":"proprietary","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":{"per_minute":0.06,"unit":"per minute overage on Free/Pro ($0.07 Starter/Creator, $0.05 Scale, $0.04 Business); plans include monthly minutes","source":"https://www.hume.ai/pricing"},"price_line":"$0.06 per minute","access":[{"provider":"Hume API (EVI WebSocket)","model_id":"EVI version 3 or 4-mini (set in EVI config)","endpoint":"wss://api.hume.ai/v0/evi/chat","docs":"https://dev.hume.ai/docs/speech-to-speech-evi/overview"},{"provider":"Web app","url":"https://platform.hume.ai"}],"capabilities":[{"name":"Empathic voice interface with any prompted voice","detail":"EVI 3 (2025-05-29) is a speech-to-speech foundation model that can speak in any of 100,000+ custom voices created via prompting, with inferred personality; ~1.2 s practical end-of-speech-to-response latency at launch.","first":false,"discovered":"launch","source":"https://www.hume.ai/blog/introducing-evi-3"},{"name":"EVI 4 mini: Octave 2 voice in 11 languages","detail":"EVI 4 mini (announced with Octave 2 on 2025-10-01) brings Octave 2 to the speech-to-speech API in 11 languages but must be paired with an external LLM (Anthropic, OpenAI, Google, Fireworks...) until the full EVI 4 ships.","first":false,"discovered":"launch","source":"https://www.hume.ai/blog/octave-2-launch"}],"entry":null,"notes":"EVI 3 is English-only and can answer without an external LLM ('quick responses'); EVI 4 mini is multilingual but requires a supplemental LLM. Both share the same WebSocket; version is chosen in the EVI configuration. Full EVI 4 not launched as of 2026-09-29 (not on Hume blog). EVI 1/2 are older generations.","verified":"2026-09-29","body_md":"Hume's Empathic Voice Interface for real-time voice agents.\n\nSources: https://dev.hume.ai/docs/speech-to-speech-evi/overview , https://www.hume.ai/pricing , https://www.hume.ai/blog/introducing-evi-3","page_url":"https://postcutoff.com/m/hume-evi/","standing":{"kind":"speech and audio","newer_count":93,"newer":[{"id":"nemotron-3-5-transcribe","name":"NVIDIA Nemotron 3.5 Transcribe (30B-A4B)","org":"NVIDIA","released":"2026-10-28","page_url":"https://postcutoff.com/m/nemotron-3-5-transcribe/"},{"id":"hy-simulmt-30b-a3b","name":"Hy-SimulMT-30B-A3B","org":"Tencent","released":"2026-10-22","page_url":"https://postcutoff.com/m/hy-simulmt-30b-a3b/"},{"id":"eleven-realtime-v1-max","name":"Eleven Realtime v1 Max / Mini","org":"ElevenLabs","released":"2026-10-20","page_url":"https://postcutoff.com/m/eleven-realtime-v1-max/"},{"id":"voxtral-mini-transcribe-3","name":"Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-mini-transcribe-3/"},{"id":"voxtral-small-transcribe-3","name":"Voxtral Small Transcribe 3","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-small-transcribe-3/"}],"before":null,"after":{"id":"hume-octave-2","name":"Hume Octave 2 (TTS)","org":"Hume AI","released":"2025-10-01","page_url":"https://postcutoff.com/m/hume-octave-2/"},"weights":"closed","licence":"proprietary","licence_permissive":false,"summary":"Closed weights; access is hosted only."}}