xAI
Grok 3 Mini
Cost-efficient Grok variant with good general-purpose quality
Model Summary
Family
Grok
Version
3.0
Parameters
190B (est.)
Parameter counts for closed models are estimates; vendors rarely publish exact sizes.
VRAM Requirements by Quantization
Memory needed to serve Grok 3 Mini for inference, including a 20% overhead for activations and KV cache.
| Precision | VRAM needed | Smallest single GPU that fits |
|---|---|---|
| INT4 (4-bit) | 106.17 GB | AMD Instinct MI250X (128 GB) |
| INT8 (8-bit) | 212.34 GB | AMD Instinct MI325X (256 GB) |
| FP16 (16-bit) | 424.68 GB | Multi-GPU required |
| FP32 (32-bit) | 849.37 GB | Multi-GPU required |
Recommended GPU Configurations
Cheapest on-demand configurations to serve Grok 3 Mini at 8-bit (212 GB VRAM).
2x AMD Instinct MI250X
256 GB total VRAM · CDNA 2
~$5.00/h
14x NVIDIA T4
224 GB total VRAM · Turing · multi-node
~$7.00/h
1x AMD Instinct MI325X
256 GB total VRAM · CDNA 3
~$8.00/h
Quick GPU Planning
Use the calculator pre-filled with this exact version to estimate memory, speed, and compute requirements in a few clicks.
Access Pre-filled CalculatorFrequently Asked Questions
How much VRAM do you need to run Grok 3 Mini?
With an estimated 190B parameters, Grok 3 Mini needs roughly 212 GB of VRAM in 8-bit (INT8), 106 GB in 4-bit, and 425 GB in FP16, including a 20% overhead for activations and KV cache.
Which GPUs can run Grok 3 Mini?
At 8-bit quantization, the most cost-effective option is 2x AMD Instinct MI250X (256 GB combined VRAM, around $5.00/hour on-demand). Higher-end cards like the NVIDIA B200 or AMD MI355X reduce the GPU count needed.
Can Grok 3 Mini run on a single GPU?
Yes. In 8-bit, a single AMD Instinct MI325X (256 GB) fits the model.
How much does it cost to serve Grok 3 Mini in the cloud?
Renting 2x Instinct MI250X costs on the order of $5.00/hour, i.e. about $3,650/month running 24/7. Actual prices vary by provider and commitment; spot and reserved capacity can be significantly cheaper.
Deploy on a GPU cloud
Rent 2x Instinct MI250X by the hour instead of buying hardware.
