ContextPilot E4B — Hardware Requirements & GPU Compatibility
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ContextPilot E4B is a 7.9B-parameter open language model from Tencent. It supports a context window of up to 131,072 tokens. At BF16 it needs about 16.40 GB of VRAM — see which GPUs and Macs can run it below.
550 downloads
6 likesSpecifications
- Publisher
- Tencent
- Parameters
- 7.9B
- Architecture
- Gemma4ForConditionalGeneration
- Context Length
- 131,072 tokens
- Vocabulary Size
- 262,144
- Release Date
- 2026-08-27
- License
- Other
Get Started
HuggingFace
How Much VRAM Does ContextPilot E4B Need?
Select a quantization to see compatible GPUs below.
| Quantization | Bits | VRAM | + Context | File Size | Quality |
|---|---|---|---|---|---|
| BF16est. | 16.00 | 16.4 GB | 30.3 GB | 15.88 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 ContextPilot E4B?
BF16 · 16.4 GBContextPilot E4B (BF16) requires 16.4 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 22+ GB is recommended. Using the full 131K context window can add up to 13.9 GB, bringing total usage to 30.3 GB. 8 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti.
Runs great
— Plenty of headroom
Which Devices Can Run ContextPilot E4B?
BF16 · 16.4 GB41 devices with unified memory can run ContextPilot E4B, including NVIDIA DGX H100, NVIDIA DGX A100 640GB, Mac Mini M4 Pro (24 GB).
Runs great
— Plenty of headroomDecent
— Enough memory, may be tightRelated Models
Frequently Asked Questions
- How much VRAM does ContextPilot E4B need?
ContextPilot E4B requires 16.4 GB of VRAM at BF16. Full 131K context adds up to 13.9 GB (30.3 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 7.9B × 16 bits ÷ 8 = 15.9 GB
KV Cache + Overhead ≈ 0.5 GB (at 2K context + ~0.3 GB framework)
KV Cache + Overhead ≈ 14.4 GB (at full 131K context)
VRAM usage by quantization
BF1616.4 GBBF16 + full context30.3 GB- Can I run ContextPilot E4B on a Mac?
ContextPilot E4B requires at least 16.4 GB at BF16, 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 ContextPilot E4B locally?
Yes — ContextPilot E4B can run locally on consumer hardware. At BF16 quantization it needs 16.4 GB of VRAM. Popular tools include Ollama, LM Studio, and llama.cpp.
- How fast is ContextPilot E4B?
At BF16, ContextPilot E4B can reach ~293 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~40 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 ÷ 16.4 × 0.65 = ~317 tok/s
Estimated speed at BF16 (16.4 GB)
~317 tok/s~40 tok/s~317 tok/s~293 tok/sReal-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
- What's the download size of ContextPilot E4B?
At BF16, the download is about 15.88 GB.
- Which GPUs can run ContextPilot E4B?
8 consumer GPUs can run ContextPilot E4B at BF16 (16.4 GB). Top options include NVIDIA GeForce RTX 5090, AMD Radeon RX 7900 XT, AMD Radeon RX 7900 XTX. 1 GPU have plenty of headroom for comfortable inference.
- Which devices can run ContextPilot E4B?
41 devices with unified memory can run ContextPilot E4B at BF16 (16.4 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.