Nex N2.5 Mini — Hardware Requirements & GPU Compatibility
ChatVision
Nex N2.5 Mini is a 35.1B-parameter open language model from nex-agi. It supports a context window of up to 262,144 tokens. At Q4_K_M it needs about 21.45 GB of VRAM — see which GPUs and Macs can run it below.
8.8K downloads
841 likesSpecifications
- Publisher
- nex-agi
- Parameters
- 35.1B
- Architecture
- Qwen3_5MoeForConditionalGeneration
- Context Length
- 262,144 tokens
- Vocabulary Size
- 248,320
- Release Date
- 2026-09-08
- License
- Apache 2.0
Get Started
HuggingFace
How Much VRAM Does Nex N2.5 Mini Need?
Select a quantization to see compatible GPUs below.
| Quantization | Bits | VRAM | + Context | File Size | Quality |
|---|---|---|---|---|---|
| Q2_K | 3.40 | 15.3 GB | 26.0 GB | 14.92 GB | 2-bit quantization with K-quant improvements |
| Q3_K_S | 3.50 | 15.7 GB | 26.4 GB | 15.36 GB | 3-bit small quantization |
| Q3_K_M | 3.90 | 17.5 GB | 28.1 GB | 17.11 GB | 3-bit medium quantization |
| Q4_0 | 4.00 | 17.9 GB | 28.6 GB | 17.55 GB | 4-bit legacy quantization |
| Q4_K_M | 4.80 | 21.4 GB | 32.1 GB | 21.06 GB | 4-bit medium quantization — most popular sweet spot |
| Q5_K_M | 5.70 | 25.4 GB | 36.0 GB | 25.01 GB | 5-bit medium quantization — good quality/size tradeoff |
| Q6_K | 6.60 | 29.4 GB | 40 GB | 28.96 GB | 6-bit quantization, very good quality |
| Q8_0 | 8.00 | 35.5 GB | 46.1 GB | 35.11 GB | 8-bit quantization, near-lossless |
est.= calculated VRAM estimate; no published GGUF file found for that quantization yet. Other rows are verified against real community uploads.
Which GPUs Can Run Nex N2.5 Mini?
Q4_K_M · 21.4 GBNex N2.5 Mini (Q4_K_M) requires 21.4 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 28+ GB is recommended. Using the full 262K context window can add up to 10.7 GB, bringing total usage to 32.1 GB. 7 GPUs can run it, including NVIDIA GeForce RTX 5090.
All compatible consumer-level GPUs are running near their VRAM limit. You may also want to consider professional GPUs (e.g., NVIDIA A100, H100) which offer significantly more VRAM. For more headroom and better throughput, consider a multi-GPU configuration with tensor parallelism (supported by tools like vLLM, llama.cpp, or text-generation-inference).
Which Devices Can Run Nex N2.5 Mini?
Q4_K_M · 21.4 GB41 devices with unified memory can run Nex N2.5 Mini, including NVIDIA DGX H100, NVIDIA DGX A100 640GB, NVIDIA Jetson AGX Orin 32GB.
Runs great
— Plenty of headroomDecent
— Enough memory, may be tightWhere to Download Nex N2.5 Mini
Community quantizations of this model — GGUF for llama.cpp, Ollama, and LM Studio, plus AWQ/MLX variants where available.
Related Models
Frequently Asked Questions
- How much VRAM does Nex N2.5 Mini need?
Nex N2.5 Mini requires 21.4 GB of VRAM at Q4_K_M, or 70.6 GB at BF16. Full 262K context adds up to 10.7 GB (32.1 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 35.1B × 4.8 bits ÷ 8 = 21.1 GB
KV Cache + Overhead ≈ 0.3 GB (at 2K context + ~0.3 GB framework)
KV Cache + Overhead ≈ 11 GB (at full 262K context)
VRAM usage by quantization
Q4_K_M21.4 GBQ4_K_M + full context32.1 GB- Can NVIDIA GeForce RTX 4090 run Nex N2.5 Mini?
Yes, at Q4_K_M (21.4 GB) or lower. Higher quantizations like Q5_K_S (24.5 GB) exceed the NVIDIA GeForce RTX 4090's 24 GB.
- What's the best quantization for Nex N2.5 Mini?
For Nex N2.5 Mini, Q4_K_M (21.4 GB) offers the best balance of quality and VRAM usage. Q5_K_S (24.5 GB) provides better quality if you have the VRAM. The smallest option is IQ2_XXS at 10.0 GB.
VRAM requirement by quantization
IQ2_XXS10.0 GBQ2_K15.3 GBQ4_017.9 GBQ4_K_M ★21.4 GBQ5_K_M25.4 GBBF1670.6 GB★ Recommended — best balance of quality and VRAM usage.
- Can I run Nex N2.5 Mini on a Mac?
Nex N2.5 Mini requires at least 10.0 GB at IQ2_XXS, which exceeds the unified memory of most consumer Macs. You would need a Mac Studio or Mac Pro with a high-memory configuration.
- Can I run Nex N2.5 Mini locally?
Yes — Nex N2.5 Mini can run locally on consumer hardware. At Q4_K_M quantization it needs 21.4 GB of VRAM. Popular tools include Ollama, LM Studio, and llama.cpp.
- How fast is Nex N2.5 Mini?
At Q4_K_M, Nex N2.5 Mini can reach ~118 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~171 tok/s. Speed depends mainly on GPU memory bandwidth. Real-world results typically within ±20%.
tok/s = (bandwidth GB/s ÷ model GB) × efficiency
Example: NVIDIA B200 → 8000 ÷ 21.4 × 0.65 = ~376 tok/s
Estimated speed at Q4_K_M (21.4 GB)
~376 tok/s~171 tok/s~376 tok/s~339 tok/sReal-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
- What's the download size of Nex N2.5 Mini?
At Q4_K_M, the download is about 21.06 GB. The full-precision BF16 version is 70.21 GB. The smallest option (IQ2_XXS) is 9.65 GB.
- Which GPUs can run Nex N2.5 Mini?
7 consumer GPUs can run Nex N2.5 Mini at Q4_K_M (21.4 GB). Top options include AMD Radeon RX 7900 XTX, NVIDIA GeForce RTX 3090.
- Which devices can run Nex N2.5 Mini?
41 devices with unified memory can run Nex N2.5 Mini at Q4_K_M (21.4 GB), including AMD Ryzen AI 9 HX 370 (Strix Point) Laptop, ASUS Ascent GX10, Asus ROG Flow Z13 (2025, Ryzen AI Max+ 395, 128 GB), Beelink GTR9 Pro (Ryzen AI Max+ 395, 128 GB). Apple Silicon Macs use unified memory shared between CPU and GPU, making them well-suited for local LLM inference.