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Language modelOpen weights

Nemotron 3.5 Bolt E4B

NVIDIA

Released
October 23, 2026
Data date
October 24, 2026
Benchmark-Meta-Score
Unavailable
No independent results
Input
Text according to Hugging Face. NVIDIA also reports image and audio inputs through NIM.
Output
Text

Nemotron 3.5 Bolt E4B has 8 billion total parameters and 4 billion effective parameters. It builds on Gemma-4-E4B-it. The BF16 config specifies 65,536 context tokens, and OpenMDW 1.1 governs the model weights.

Sources differ on input modalities. The Hugging Face card lists text. NVIDIA's technical report also documents image and audio input through NIM and corresponding evaluations. It also says post-training was text-only.

Specifications and access

SpecificationValue and source
Provider model ID
nvidia/NVIDIA-Nemotron-3.5-Bolt-E4B-BF16Source
Access
Open weights; local deployment and NVIDIA NIMSource
Input modalities
Text according to Hugging Face. NVIDIA also reports image and audio inputs through NIM.Source
Output modalities
TextSource
License
OpenMDW 1.1; the model was post-trained from Gemma-4-E4B-it, whose base license NVIDIA separately lists as Apache 2.0.Source
Context window
The BF16 config and NIM report specify 65,536 tokens. The model card describes input and output as up to 64K each.Source
Modality statements
The Hugging Face model card lists text input and output. The technical report additionally describes image and audio input in NIM and image and audio evaluations. The report also says post-training was text-only.Source
Architecture
Post-trained from Gemma-4-E4B-it; 8 billion total and 4 billion effective parameters.Source
Reasoning and tools
Reasoning can be enabled or disabled with enable_thinking; tool calls and DFlash speculative decoding are documented for NIM.Source
Data cutoff
The model card lists May 2026 as the end of the model date range.Source
Quantized release
The 4 GB Q4_K_M version is another published quantization of the same model. Q4_K_M, IQ4_XS, and IQ4_NL benchmark results are identified separately.Source
Hosted price
No ongoing API price is documented for NVIDIA NIM. Open weights do not imply free hosted API access.Source
License
OpenMDW-1.1Source
Base model
Gemma-4-E4B-itSource
Context window in tokens
65,536Source
Parameter details
8B total, 4B effectiveSource
Modality details
Hugging Face card says text; technical report says downloadable NIM accepts text, images and audioSource
Release
2026-10-23Source
Source access
Open weights for local deployment; downloadable NVIDIA NIM; no continuing hosted API price establishedSource
Reasoning control
Reasoning can be enabled/disabled with enable_thinking; tool calls and DFlash are documentedSource
Post-training data cutoff
2026-05Source
Source output limit
Up to 64K tokens (The model card gives the rounded value 64K. It does not establish an exact integer output limit.)Source