{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/indextts-2/","md":"https://postcutoff.com/m/indextts-2/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":"indextts-2","name":"IndexTTS-2 / IndexTTS-2.5 (bilibili)","org":"bilibili (Index Team)","family":"IndexTTS","released":"2025-09-08","status":"current","type":"audio/speech","modality_in":["text","audio"],"modality_out":["audio"],"open_weights":true,"model_license":"bilibili Model Use License Agreement (commercial use by request)","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":null,"price_line":"Price not published","access":[{"provider":"Hugging Face","model_id":"IndexTeam/IndexTTS-2","url":"https://huggingface.co/IndexTeam/IndexTTS-2"},{"provider":"GitHub","url":"https://github.com/index-tts/index-tts"}],"capabilities":[{"name":"Precise duration control in an autoregressive TTS","detail":"Lets users specify the exact number of speech tokens (useful for dubbing/lip-sync) while keeping AR naturalness, and disentangles speaker timbre from emotion (emotion from a separate reference audio or text).","first":false,"discovered":"launch","source":"https://huggingface.co/IndexTeam/IndexTTS-2"},{"name":"IndexTTS-2.5 multilingual","detail":"2026-08-10 release adds Japanese, Spanish and Arabic to Chinese/English; speed 0.5-2x, Pinyin/CMU/Kana pronunciation control, RTF ~0.2 on RTX 4090.","first":false,"discovered":"later","source":"https://github.com/index-tts/index-tts"}],"entry":null,"notes":"The IndexTTS2 paper (arXiv June 2025) presents duration control as novel for AR TTS; 'first' not independently verified, so not flagged. Weights released 2025-09-08. Commercial use: contact indexspeech@bilibili.com.","verified":"2026-09-29","body_md":"Sources: https://github.com/index-tts/index-tts , https://huggingface.co/IndexTeam/IndexTTS-2","page_url":"https://postcutoff.com/m/indextts-2/","standing":{"kind":"speech and audio","newer_count":86,"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":null,"weights":"public","licence":"bilibili Model Use License Agreement (commercial use by request)","licence_permissive":false,"summary":"Weights are public. Licence: bilibili Model Use License Agreement. See the licence for commercial terms."}}