Petitgpt — Hardware Requirements & GPU Compatibility
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Petitgpt is a 125M-parameter open language model from yqi0. It supports a context window of up to 2,048 tokens. At BF16 it needs about 0.27 GB of VRAM — see which GPUs and Macs can run it below.
Runs great on a 24 GB GPU
Runs from 8 GB (BF16 · 2K)Best on 24 GB (BF16 · ~2427 tok/s · 2K)Macs from 8 GB (BF16 · ~266 tok/s)
Apache 2.0
Reference GPU · RTX 4090 24 GB
Estimates, ±20% · how we estimate
Run Petitgpt
One recommended way. Every other method, OS and quant is in the step-by-step guide.Each way opens a step-by-step guide for your OS and quant.
Recommended
vllm serve yqi0/petitgpt --max-model-len 2048vLLM repo with its own quantisation
Download: Weights on Hugging Face
Ways to runOther ways
each opens step-by-stepRun in cloud
Runs on RTX 3080 Ti (12 GB) (11 GB headroom) · BF16
- Generation speed
- ~2197 tok/s
- generation speed
- Cost per 1M output tokens
- $0.015
- per 1M output tokens
How Much VRAM Does Petitgpt Need?
Select a quantization level; the listed hardware adheres to it.
| Quantization | VRAM | +32K | On RTX 4090 (reference) | |
|---|---|---|---|---|
| 0.3 GB | — | 16-bit · bfloat — Brain floating point 16 — preferred for training | Fits: 2K context · ~2427 tok/s |
Selected BF16
Brain floating point 160.3GBat 2K context
- Weights
- 0.1 GB
- KV cache
- 0.0 GB
- Overhead
- 0.3 GB
Fits RTX 4090 (reference) · 23.7 GB free · ~2427 tok/s
≥50 tok/s needs ≥21 GB/s · RTX 5090 ~4314, RTX 3090 Ti ~2427
Which Hardware Can Run Petitgpt?
BF16 · 0.3 GBPetitgpt (BF16) requires 0.3 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 1+ GB is recommended. 52 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti. 163 devices with unified memory can run Petitgpt, including Mac Studio (M3 Ultra, 256GB), Mac Studio (M3 Ultra, 512GB).
≤ 11 GB
≤ 11 GB tier →fits · 7.7 GB free · up to 2K ctx
16 GPUs · 1 Mac class · 2 device families
RTX 3080~1830Simulate output on RTX 3080RTX 2080 Ti~1483Simulate output on RTX 2080 TiRTX 3070 Ti~1464Simulate output on RTX 3070 TiM3*8 GB~266Simulate output on iMac 24" M3 (8 GB)Orin Nano~246Simulate output on NVIDIA Jetson Orin Nano 8GB (Super)iPhone~177Simulate output on iPhone 1720 GB
fits · 19.7 GB free · up to 2K ctx
1 GPU
RX 7900 XT~1778Simulate output on RX 7900 XT32–40 GB
fits · 31.7 GB free · up to 2K ctx
1 GPU · 3 Mac classes · 4 device families
RTX 5090~4314Simulate output on RTX 5090M5 Max36 GB~1193Simulate output on Mac Studio M5 Max (36 GB)M532 GB~398Simulate output on MacBook Air 13" M5 (32 GB)Orin~493Simulate output on NVIDIA Jetson AGX Orin 32GBSnapdragon X Elite (X1E-80-100)~325Simulate output on Snapdragon X Elite Copilot+ PC
By VRAM tier · typical GPUs and Macs at BF16
Similar models
1| Model | Score | VRAM | tok/s | Why it is similar |
|---|---|---|---|---|
| SmolLM 135M Instruct FP32modularai | — | 0.4 GB | ~1524 | same size |
Specifications
- Publisher
- yqi0
- Parameters
- 125M
- Context Length
- 2,048 tokens
- Vocabulary Size
- 32,000
- Release Date
- 2026-09-11
- License
- Apache 2.0
Frequently Asked Questions
How much VRAM does Petitgpt need?
Petitgpt requires 0.3 GB of VRAM at BF16.
VRAM = Weights + KV Cache + Overhead
Weights = 125M × 16 bits ÷ 8 = 0.2 GB
KV Cache + Overhead ≈ 0.1 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.
VRAM usage by quantization
Can I run Petitgpt on a Mac?
Yes — MacBook Air 13" M3 (8 GB) and 145 other Macs can run Petitgpt. Apple Silicon uses unified memory, so the model shares RAM with the system. At BF16 you need at least 0.3 GB of usable unified memory (RAM minus macOS overhead).
Can I run Petitgpt locally?
Yes — Petitgpt can run locally on consumer hardware. Popular tools include Ollama, LM Studio, and llama.cpp.
How fast is Petitgpt?
At BF16, Petitgpt can reach ~17778 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~2427 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 ÷ 0.27 × 0.65 = ~19259 tok/s
Estimated speed at BF16 (0.3 GB)
Real-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
What's the download size of Petitgpt?
At BF16, the download is about 0.25 GB.
Which GPUs can run Petitgpt?
52 consumer GPUs can run Petitgpt at BF16. 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 Petitgpt?
163 devices with unified memory can run Petitgpt at BF16 (0.3 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.