Nanbeige4.3-33B is a 33-billion-parameter open-weights language model from Nanbeige LLM Lab, built for agentic work such as terminal coding, repository tasks and multi-step office automation. The developer describes it as the flagship "teacher" of the Nanbeige4.3 series, meant to anchor distillation into smaller models such as a planned Nanbeige4.3-3B. This guide is based on the model card, its config file and community quantization repositories as checked on October 31, 2026, when the page showed 820 likes and 13,832 downloads in the past month.

What is Nanbeige4.3-33B?

It is a fine-tuned chat model built on Nanbeige4.3-33B-Base and published in BF16 safetensors. The Hub tags it for text generation with Transformers, and lists English and Chinese as its languages. According to the developer, the goal was state-of-the-art agentic performance among open models in the roughly 30B class, with particular strength in complex coding and what the card calls professional cowork tasks.

• Architecture: LlamaForCausalLM with 52 layers, a hidden size of 7,168 and a vocabulary of 166,912 tokens (config.json).
• Attention: 56 query heads and 8 key-value heads (grouped-query attention), head dimension 128.
• Context: up to 524,288 tokens (512K).
• Files: 14 safetensors shards totaling about 66.3 GB.
• License tag: apache-2.0.

Because the config has no mixture-of-experts fields, this is effectively a dense model: every parameter participates in every token. Keep that in mind when comparing it with MoE models that advertise a similar total size but activate only a fraction per token.

Thinking mode and tool calling

The chat template exposes two switches. enable_thinking is on by default and makes the model reason before it answers. preserve_thinking keeps earlier reasoning in the conversation history; the developer recommends False for ordinary chat and True for multi-turn tool use, office tasks and coding agents. Passing tools enables a tool-use template, with XML tool calls recommended and JSON supported for compatibility. Suggested sampling is temperature 1.0 and top_p 0.95 with up to 65,536 new tokens for agentic work, and temperature 0.6 with up to 262,144 new tokens for reasoning and chat.

How to read the Nanbeige4.3-33B benchmarks

The model card compares Nanbeige4.3-33B with Qwen3.8-27B, Muse-Glimmer-30B and Gemma4-31B, all evaluated at their highest thinking effort with shared hyperparameters and harnesses. These are developer-reported numbers. Treat them as a starting hypothesis until independent evaluations appear.

The biggest margins are on terminal tasks, DeepSWE and Automation Bench (54.2 vs 38.3 for Qwen3.8-27B). On SWE-Bench Pro, which is closer to real repository fixes, and on GDPval, Qwen3.8-27B is slightly ahead, while Gemma4-31B posts the top GPQA Diamond score. The useful question is not which model wins most rows but which row looks most like your workload.

Early community reports often surface practical problems a benchmark table hides, such as broken chat templates or repetitive output. Tracking how developers discuss a new release in theddari's AI Telegram trends and blog trends feeds can help you spot those issues before you commit hardware time.

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Hardware needed to run a 33B model locally

Start with weight size. The full BF16 checkpoint is about 66 GB, which is why the developer's vLLM and SGLang examples use tensor parallelism across four GPUs. The developer has also published official FP8, INT8 and INT4 variants, and the Hub listed 99 quantized derivatives at the time of checking. For llama.cpp-style runtimes, the bartowski GGUF repository is a common reference.

The repository's rule of thumb: for full GPU offload, choose a file 1 to 2 GB smaller than your VRAM; for maximum quality, compare against VRAM plus system RAM. The quants were made with llama.cpp release b11845, so update older builds before loading them.

The KV cache is the hidden cost

Context length adds memory on top of the weights. Using the config values, a 16-bit KV cache needs 2 (keys and values) × 52 layers × 8 KV heads × 128 dimensions × 2 bytes = 212,992 bytes per token. That works out to about 6.98 GB at 32,768 tokens, 27.9 GB at 131,072 tokens and 111.7 GB at the full 524,288 tokens. Runtimes that quantize or page the cache will use less, but 512K support does not mean 512K is practical on a desktop. On a 24 GB card, Q4_K_M leaves roughly 3 GB, which is not enough even for a 32K context at 16-bit. Apple Silicon users face the same arithmetic with unified memory, plus whatever the operating system needs.

Apache 2.0 license: what commercial users should check

The Hub metadata lists apache-2.0. The Apache License 2.0 allows use, modification, redistribution and commercial use, and includes a patent grant. If you redistribute the weights or a derivative, you must include a copy of the license, mark modified files and keep existing attribution notices. The license grants no trademark rights and comes with no warranty.

1. Record the exact repository and commit you deploy. At the time of checking, the original repository's file list showed no separate LICENSE or NOTICE file, so keep the metadata snapshot or written confirmation from the developer if your legal team needs it.
2. Check each quantization or fine-tune separately. Repositories labeled abliterated or Heretic advertise removed safeguards and deserve extra output review.
3. The Transformers example sets trust_remote_code=True. Pin a commit, read the code and run it in an isolated environment.
4. Plan your own evaluation and filtering before exposing the model to customers; responsibility for outputs stays with the deployer.

In short, Nanbeige4.3-33B is a dense 33B model with strong self-reported agentic scores and a permissive license tag, but it is heavy to run: about 66 GB in BF16 and around 20 GB even at 4-bit, before context. Size your memory budget for the context you actually need, confirm your runtime version, verify the license of the exact files you download, and benchmark it on your own tasks against the model you use today.