Gemini 3.5 Flash
Google's fastest agentic model with strong quality-per-cost ratio
Model Summary
Family
Gemini
Version
3.5
Parameters
150B (est.)
Parameter counts for closed models are estimates; vendors rarely publish exact sizes.
VRAM Requirements by Quantization
Memory needed to serve Gemini 3.5 Flash for inference, including a 20% overhead for activations and KV cache.
| Precision | VRAM needed | Smallest single GPU that fits |
|---|---|---|
| INT4 (4-bit) | 83.82 GB | NVIDIA RTX PRO 6000 Blackwell (96 GB) |
| INT8 (8-bit) | 167.64 GB | NVIDIA B200 SXM (192 GB) |
| FP16 (16-bit) | 335.28 GB | Multi-GPU required |
| FP32 (32-bit) | 670.55 GB | Multi-GPU required |
Recommended GPU Configurations
Cheapest on-demand configurations to serve Gemini 3.5 Flash at 8-bit (168 GB VRAM).
2x AMD Instinct MI250X
256 GB total VRAM · CDNA 2
~$5.00/h
11x NVIDIA T4
176 GB total VRAM · Turing · multi-node
~$5.50/h
1x AMD Instinct MI300X
192 GB total VRAM · CDNA 3
~$6.00/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 Gemini 3.5 Flash?
With an estimated 150B parameters, Gemini 3.5 Flash needs roughly 168 GB of VRAM in 8-bit (INT8), 84 GB in 4-bit, and 335 GB in FP16, including a 20% overhead for activations and KV cache.
Which GPUs can run Gemini 3.5 Flash?
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 Gemini 3.5 Flash run on a single GPU?
Yes. In 8-bit, a single NVIDIA B200 SXM (192 GB) fits the model.
How much does it cost to serve Gemini 3.5 Flash 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.
