Nemotron 3.5 Transcribe is an open speech model for 40 languages
Open weights under OpenMDW-1.1, built for recorded audio, hosted by Baseten, DeepInfra and Simplismart.
NVIDIA released Nemotron 3.5 Transcribe on October 28, 2026, an open-weight speech model that turns recorded audio into text in 40 languages. The weights are on Hugging Face and ModelScope under the OpenMDW-1.1 license.
What changed
- The model is
NVIDIA-Nemotron-3.5-Transcribe-30B-A4B. NVIDIA says it pairs a speech encoder and Nemotron 3 Diarization with the Nemotron 3.5 Lightning 30B-A3B language model, for about 4.3B active parameters. - One checkpoint transcribes 40 languages, translates 31 of them to or from English and attributes speakers in 13. It handles recordings up to one hour and labels up to eight speakers, with word-level timestamps on request.
- The transcript style (verbatim, written form, speaker labels, translation) is set per request with a plain-language instruction.
- It is built for recorded audio, not live streaming.
- vLLM and SGLang-Omni support it from day one. Hosted endpoints are available from Baseten, DeepInfra and Simplismart. NVIDIA's announcement lists no prices.
What it means
Teams transcribing calls, meetings or dictation in batches now have a permissively licensed open model they can self-host or call through a host. Spot-check names and speaker changes against the recording, as NVIDIA advises, and compare cost per audio hour on your own files.
What to do
Download nvidia/NVIDIA-Nemotron-3.5-Transcribe-30B-A4B from Hugging Face or ModelScope and serve it with vLLM or SGLang-Omni. The model card lists recommended prompt presets and which tasks each language supports.
Nemotron 3.5 Transcribe is not in the RouterPlus catalog. If you need dedicated capacity for it, tell us on I need inference.