Is Smaug-Nemotron-3.5 state of the art?Pending benchmarks.Announced Oct 23, 2026; no independent results yet.
Abacus.AI's agentic-coding fine-tune of NVIDIA's Nemotron 3.5 Super VL (120B total / 12B active), supervised-fine-tuned on multi-turn agentic coding trajectories. Open weights on Hugging Face in BF16 and NVFP4 under the OpenMDW-1.1 license inherited from the base; Abacus.AI says it runs on a single DGX Spark, H200 or GB200.
The details so far
- Lab
- Abacus.AI
- Announced
- Oct 23, 2026
- API
- Not yet
- Open weights
- Published · Hugging Face: abacusai/Smaug-Nemotron-3.5 (BF16) and abacusai/Smaug-Nemotron-3.5-NVFP4; not gated
- Parameters
- 120B total / 12B active
- Base model
- nvidia/NVIDIA-Nemotron-3.5-Super-VL-120B-A12B-BF16
- Training
- Supervised fine-tuning on agentic multi-turn coding trajectories
- Architecture
- Hybrid Mamba-2 + mixture-of-experts + attention, with a C-RADIO vision encoder and an MTP head (from the base)
- Input / output
- Text, images and video in; text out. Reasoning can be switched on or off
- Context
- Up to 1M tokens
- License
- OpenMDW-1.1 (inherited from the NVIDIA base)
- Hardware
- Lab says one DGX Spark, one H200 or one GB200 is enough
Tags marked unsure are not stated on the lab's own pages.
What would let us call it
Verdicts use only independent boards we already track. Two consecutive snapshots are required before any crown.
- Publicly announced with a source
- Usable by the public (API or weights)
- Listed on an independent board we track
- Enough results for a rank in a category
- Holds across two snapshots (crowns only)
What the lab claims
Self-reported. Shown for context; not used in any verdict.
Lab claim (self-reported, model card, Smaug vs the base): SWE-bench Verified 72.3 vs 71.1; SWE-bench Multilingual 68.9 vs 67.7; Terminal-Bench 2.1 69.1 vs 60.7; DeepSWE 27.4 vs 24.7; NL2RepoBench 32.2 vs 30.2; LiveBench 2.0 Agentic 18.1 vs 15.8.
Lab claim: the best US open-source agentic model that can run on a single machine (Abacus.AI CEO's announcement).
Sources
LABBindu Reddy (Abacus.AI CEO) announcing Smaug-Nemotron-3.5 on Xx.com/bindureddy/status/2113480704764076310 · Oct 23, 2026REPOabacusai/Smaug-Nemotron-3.5 on Hugging Facehuggingface.co/abacusai/Smaug-Nemotron-3.5 · Oct 23, 2026REPOabacusai/Smaug-Nemotron-3.5-NVFP4 on Hugging Facehuggingface.co/abacusai/Smaug-Nemotron-3.5-NVFP4 · Oct 22, 2026Tracking continues until an independent board lists it.