{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/step-audio-editx/","md":"https://postcutoff.com/m/step-audio-editx/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":"step-audio-editx","name":"StepFun Step-Audio-EditX","org":"StepFun","family":"Step-Audio","released":"2025-11-06","status":"current","type":"audio/speech","modality_in":["text","audio"],"modality_out":["audio"],"open_weights":true,"model_license":"apache-2.0 (code; check model card for weights)","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":null,"price_line":"Price not published","access":[{"provider":"Hugging Face","model_id":"stepfun-ai/Step-Audio-EditX","url":"https://huggingface.co/stepfun-ai/Step-Audio-EditX"},{"provider":"Hugging Face (4-bit)","model_id":"stepfun-ai/Step-Audio-EditX-AWQ-4bit","url":"https://huggingface.co/stepfun-ai/Step-Audio-EditX-AWQ-4bit"},{"provider":"GitHub","url":"https://github.com/stepfun-ai/Step-Audio-EditX"}],"capabilities":[{"name":"Iterative LLM-based audio editing","detail":"3B RL-trained audio LLM that edits emotion, speaking style and paralinguistics of existing speech step by step, plus zero-shot TTS cloning (Mandarin, English, Sichuanese, Cantonese; Japanese/Korean added 2025-11-28).","first":false,"discovered":"launch","source":"https://github.com/stepfun-ai/Step-Audio-EditX"}],"entry":null,"notes":"Official changelog lists a new model release on 2026-01-29 (overall ~4% improvement; new paralinguistic tags such as exhale, inhale, chuckle, clears throat, giggle; SFT/DPO/GRPO training code released); HF weights updated 2026-01-23/24, README edits to 2026-02-14. No March 2026 release appears in the official GitHub/HF changelog, so Artificial Analysis's 'Step Audio EditX (Mar 2026)' label (#3 open weights, ~1095 Elo, Sept 2026) probably refers to the Jan 2026 weights or a hosted snapshot (unverified).","verified":"2026-09-29","body_md":"Sources: https://github.com/stepfun-ai/Step-Audio-EditX , https://huggingface.co/stepfun-ai/Step-Audio-EditX","page_url":"https://postcutoff.com/m/step-audio-editx/","standing":{"kind":"speech and audio","newer_count":80,"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":"stepaudio-3-realtime","name":"StepAudio 3 Realtime","org":"StepFun","released":"2026-09-15","page_url":"https://postcutoff.com/m/stepaudio-3-realtime/"},"weights":"public","licence":"apache-2.0 (code; check model card for weights)","licence_permissive":false,"summary":"Weights are public. Licence: Apache-2.0. See the licence for commercial terms."}}