Parable Qwen3 4B Claude Fable 5 — Hardware Requirements & GPU Compatibility
ChatReasoning
Parable Qwen3 4B Claude Fable 5 is a 4.0B-parameter open language model from AnkitAI in the Qwen 3 family. It supports a context window of up to 40,960 tokens. At Q4_K_M it needs about 2.90 GB of VRAM — see which GPUs and Macs can run it below.
Runs great on a 24 GB GPU
Runs from 8 GB (Q4_K_M · 40K)Best on 24 GB (Q4_K_M · ~226 tok/s · 40K)Macs from 8 GB (Q4_K_M · ~25 tok/s)
Apache 2.0
Reference GPU · RTX 4090 24 GB
Estimates, ±20% · how we estimate
Run Parable Qwen3 4B Claude Fable 5
One recommended way. Every other method, OS and quant is in the step-by-step guide.
Recommended
vllm serve AnkitAI/Parable-Qwen3-4B-Claude-Fable-5 --max-model-len 16384vLLM repo with its own quantisation
Download: Weights on Hugging Face
Other ways
each opens step-by-stepRun in cloud
Fits on RTX 3060 12GB (7 GB headroom) · Q4_K_M
- Generation speed
- ~81 tok/s
- generation speed
- Cost per 1M output tokens
- $0.26
- per 1M output tokens
How Much VRAM Does Parable Qwen3 4B Claude Fable 5 Need?
Select a quantization level; the listed hardware adheres to it.
| Quantization | VRAM | +32K | On RTX 4090 (reference) | |
|---|---|---|---|---|
| 2.2 GB | 5 GB | 2-bit · K-quant — 2-bit quantization with K-quant improvements | Fits: 40K context · ~298 tok/s | |
| 2.5 GB | 5.3 GB | 3-bit medium — 3-bit medium quantization | Fits: 40K context · ~267 tok/s | |
| 2.9 GB | 5.7 GB | 4-bit medium — 4-bit medium quantization — most popular sweet spot | Fits: 40K context · ~226 tok/s | |
| 3.4 GB | 6.2 GB | 5-bit medium — 5-bit medium quantization — good quality/size tradeoff | Fits: 40K context · ~196 tok/s | |
| 3.8 GB | 6.6 GB | 6-bit, very good — 6-bit quantization, very good quality | Fits: 40K context · ~172 tok/s | |
| 4.5 GB | 7.3 GB | 8-bit, near-lossless — 8-bit quantization, near-lossless | Fits: 40K context · ~145 tok/s | |
| 8.5 GB | 11.4 GB | 16-bit · bfloat — Brain floating point 16 — preferred for training | Fits: 40K context · ~77 tok/s |
Selected Q4_K_M
4-bit medium quantization4.2GBat 16K context
- Weights
- 2.4 GB
- KV cache
- 1.5 GB
- Overhead
- 0.3 GB
Fits RTX 4090 (reference) · 19.8 GB free · ~226 tok/s
≥50 tok/s needs ≥223 GB/s · RTX 5090 ~402, RTX 3090 Ti ~226
Which Hardware Can Run Parable Qwen3 4B Claude Fable 5?
Q4_K_M · 2.9 GBParable Qwen3 4B Claude Fable 5 (Q4_K_M) requires 2.9 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 4+ GB is recommended. Using the full 41K context window can add up to 3.6 GB, bringing total usage to 6.5 GB. 52 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti. 163 devices with unified memory can run Parable Qwen3 4B Claude Fable 5, including Mac Studio (M3 Ultra, 256GB), Mac Studio (M3 Ultra, 512GB).
≤ 11 GB
≤ 11 GB tier →fits · 3.8 GB free · up to 40K ctx
16 GPUs · 1 Mac class · 2 device families
RTX 3080~170Simulate output on RTX 3080RTX 2080 Ti~138Simulate output on RTX 2080 TiRTX 3070 Ti~136Simulate output on RTX 3070 TiM3*8 GB~25Simulate output on iMac 24" M3 (8 GB)Orin Nano~23Simulate output on NVIDIA Jetson Orin Nano 8GB (Super)iPhone~17Simulate output on iPhone 1720 GB
fits · 15.8 GB free · up to 40K ctx
1 GPU
RX 7900 XT~166Simulate output on RX 7900 XT32–40 GB
fits · 27.8 GB free · up to 40K ctx
1 GPU · 3 Mac classes · 4 device families
RTX 5090~402Simulate output on RTX 5090M5 Max36 GB~111Simulate output on Mac Studio M5 Max (36 GB)M532 GB~37Simulate output on MacBook Air 13" M5 (32 GB)Orin~46Simulate output on NVIDIA Jetson AGX Orin 32GBSnapdragon X Elite (X1E-80-100)~30Simulate output on Snapdragon X Elite Copilot+ PC
By VRAM tier · typical GPUs and Macs at Q4_K_M
Alternatives to Parable Qwen3 4B Claude Fable 5
Qwen 3 family · 77 models →Similar models
6| Model | Score | VRAM | tok/s | Why it is similar |
|---|---|---|---|---|
| Gemma 3 4B ITGoogle | 64.0 | 5 GB | ~231 | same size |
| Granite Vision 4.1 4BIBM | — | 4 GB | ~228 | same size |
| MiniCPM V 4OpenBMB | — | 3.1 GB | ~236 | same size |
| Phi 4 Mini ReasoningMicrosoft | — | 4.8 GB | ~228 | same size |
| Qwen2.5 VL 3B InstructAlibaba | — | 3.2 GB | ~249 | same size |
| Phi 3.5 Vision InstructMicrosoft | — | 9.2 GB | ~183 | same size |
Specifications
- Publisher
- AnkitAI
- Family
- Qwen 3
- Parameters
- 4.0B
- Architecture
- Qwen3ForCausalLM
- Context Length
- 40,960 tokens
- Vocabulary Size
- 151,936
- Release Date
- 2026-07-09
- License
- Apache 2.0
Frequently Asked Questions
How much VRAM does Parable Qwen3 4B Claude Fable 5 need?
Parable Qwen3 4B Claude Fable 5 requires 2.9 GB of VRAM at Q4_K_M, or 8.5 GB at BF16. Full 41K context adds up to 3.6 GB (6.5 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 4.0B × 4.8 bits ÷ 8 = 2.4 GB
KV Cache + Overhead ≈ 0.5 GB (at 2K context + ~0.3 GB framework)
Fit ratings and hardware model lists check this model with room for a 16K-token context, which needs a little more memory.
KV Cache + Overhead ≈ 4.1 GB (at full 41K context)
VRAM usage by quantization
What's the best quantization for Parable Qwen3 4B Claude Fable 5?
For Parable Qwen3 4B Claude Fable 5, Q4_K_M (2.9 GB) offers the best balance of quality and VRAM usage. Q5_K_M (3.4 GB) provides better quality if you have the VRAM. The smallest option is Q2_K at 2.2 GB.
VRAM requirement by quantization
★ Recommended — best balance of quality and VRAM usage.
Can I run Parable Qwen3 4B Claude Fable 5 on a Mac?
Yes — MacBook Air 13" M3 (8 GB) and 145 other Macs can run Parable Qwen3 4B Claude Fable 5. Apple Silicon uses unified memory, so the model shares RAM with the system. At Q4_K_M you need at least 2.9 GB of usable unified memory (RAM minus macOS overhead).
Can I run Parable Qwen3 4B Claude Fable 5 locally?
Yes — Parable Qwen3 4B Claude Fable 5 can run locally on consumer hardware. Popular tools include Ollama, LM Studio, and llama.cpp.
How fast is Parable Qwen3 4B Claude Fable 5?
At Q4_K_M, Parable Qwen3 4B Claude Fable 5 can reach ~1655 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~226 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 ÷ 2.9 × 0.65 = ~1793 tok/s
Estimated speed at Q4_K_M (2.9 GB)
Real-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
What's the download size of Parable Qwen3 4B Claude Fable 5?
At Q4_K_M, the download is about 2.41 GB. The full-precision BF16 version is 8.04 GB. The smallest option (Q2_K) is 1.71 GB.
Which GPUs can run Parable Qwen3 4B Claude Fable 5?
52 consumer GPUs can run Parable Qwen3 4B Claude Fable 5 at Q4_K_M. 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 Parable Qwen3 4B Claude Fable 5?
163 devices with unified memory can run Parable Qwen3 4B Claude Fable 5 at Q4_K_M (2.9 GB), including AMD Ryzen AI 9 HX 370 (Strix Point) Laptop, ASUS Ascent GX10, Beelink GTR9 Pro (Ryzen AI Max+ 395, 128 GB), Framework Desktop (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.