Qwen2.5 0.5B Instruct ONNX — Hardware Requirements & GPU Compatibility
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Qwen2.5 0.5B Instruct ONNX is a 0.5B-parameter open language model from JasonYANG170 in the Qwen 2.5 family. It supports a context window of up to 32,768 tokens. At Q4_K_M it needs about 0.63 GB of VRAM — see which GPUs and Macs can run it below.
386 downloads
2 likesSpecifications
- Publisher
- JasonYANG170
- Family
- Qwen 2.5
- Parameters
- 0.5B
- Architecture
- Qwen2ForCausalLM
- Context Length
- 32,768 tokens
- Vocabulary Size
- 151,936
- Release Date
- 2026-09-14
- License
- Apache 2.0
Get Started
HuggingFace
How Much VRAM Does Qwen2.5 0.5B Instruct ONNX Need?
Select a quantization to see compatible GPUs below.
| Quantization | Bits | VRAM | + Context | File Size | Quality |
|---|---|---|---|---|---|
| Q2_Kest. | 3.40 | 0.5 GB | 0.9 GB | 0.21 GB | 2-bit quantization with K-quant improvements |
| Q3_K_Mest. | 3.90 | 0.6 GB | 0.9 GB | 0.24 GB | 3-bit medium quantization |
| Q4_K_Mest. | 4.80 | 0.6 GB | 1 GB | 0.30 GB | 4-bit medium quantization — most popular sweet spot |
| Q5_K_Mest. | 5.70 | 0.7 GB | 1.1 GB | 0.36 GB | 5-bit medium quantization — good quality/size tradeoff |
| Q6_Kest. | 6.60 | 0.7 GB | 1.1 GB | 0.41 GB | 6-bit quantization, very good quality |
| Q8_0est. | 8.00 | 0.8 GB | 1.2 GB | 0.50 GB | 8-bit quantization, near-lossless |
| BF16est. | 16.00 | 1.3 GB | 1.7 GB | 1.00 GB | Brain floating point 16 — preferred for training |
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 Qwen2.5 0.5B Instruct ONNX?
Q4_K_M · 0.6 GBQwen2.5 0.5B Instruct ONNX (Q4_K_M) requires 0.6 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 1+ GB is recommended. Using the full 33K context window can add up to 0.4 GB, bringing total usage to 1 GB. 52 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti.
Runs great
— Plenty of headroomWhich Devices Can Run Qwen2.5 0.5B Instruct ONNX?
Q4_K_M · 0.6 GB59 devices with unified memory can run Qwen2.5 0.5B Instruct ONNX, including NVIDIA DGX H100, NVIDIA DGX A100 640GB.
Runs great
— Plenty of headroomRelated Models
Frequently Asked Questions
- How much VRAM does Qwen2.5 0.5B Instruct ONNX need?
Qwen2.5 0.5B Instruct ONNX requires 0.6 GB of VRAM at Q4_K_M, or 1.3 GB at BF16.
VRAM = Weights + KV Cache + Overhead
Weights = 0.5B × 4.8 bits ÷ 8 = 0.3 GB
KV Cache + Overhead ≈ 0.3 GB (at 2K context + ~0.3 GB framework)
KV Cache + Overhead ≈ 0.7 GB (at full 33K context)
VRAM usage by quantization
Q4_K_M0.6 GBQ4_K_M + full context1.0 GB- What's the best quantization for Qwen2.5 0.5B Instruct ONNX?
For Qwen2.5 0.5B Instruct ONNX, Q4_K_M (0.6 GB) offers the best balance of quality and VRAM usage. Q5_K_M (0.7 GB) provides better quality if you have the VRAM. The smallest option is Q2_K at 0.5 GB.
VRAM requirement by quantization
Q2_K0.5 GBQ4_K_M ★0.6 GBQ5_K_M0.7 GBQ6_K0.7 GBQ8_00.8 GBBF161.3 GB★ Recommended — best balance of quality and VRAM usage.
- Can I run Qwen2.5 0.5B Instruct ONNX on a Mac?
Qwen2.5 0.5B Instruct ONNX requires at least 0.5 GB at Q2_K, 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 Qwen2.5 0.5B Instruct ONNX locally?
Yes — Qwen2.5 0.5B Instruct ONNX can run locally on consumer hardware. At Q4_K_M quantization it needs 0.6 GB of VRAM. Popular tools include Ollama, LM Studio, and llama.cpp.
- How fast is Qwen2.5 0.5B Instruct ONNX?
At Q4_K_M, Qwen2.5 0.5B Instruct ONNX can reach ~7619 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~1040 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 ÷ 0.6 × 0.65 = ~8254 tok/s
Estimated speed at Q4_K_M (0.6 GB)
~8254 tok/s~1040 tok/s~8254 tok/s~7619 tok/sReal-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
- What's the download size of Qwen2.5 0.5B Instruct ONNX?
At Q4_K_M, the download is about 0.30 GB. The full-precision BF16 version is 1.00 GB. The smallest option (Q2_K) is 0.21 GB.
- Which GPUs can run Qwen2.5 0.5B Instruct ONNX?
52 consumer GPUs can run Qwen2.5 0.5B Instruct ONNX at Q4_K_M (0.6 GB). Top options include AMD Radeon RX 6700 XT, AMD Radeon RX 6800, AMD Radeon RX 6800 XT. 52 GPUs have plenty of headroom for comfortable inference.
- Which devices can run Qwen2.5 0.5B Instruct ONNX?
59 devices with unified memory can run Qwen2.5 0.5B Instruct ONNX at Q4_K_M (0.6 GB), including AMD Ryzen AI 9 HX 370 (Strix Point) Laptop, ASUS Ascent GX10, Apple iPhone 17 Pro, Asus ROG Flow Z13 (2025, 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.