Gemini 2.5 Flash
Previous-generation fast model, still widely deployed
Model Summary
Family
Gemini
Version
2.5
Parameters
140B (est.)
Parameter counts for closed models are estimates; vendors rarely publish exact sizes.
VRAM Requirements by Quantization
Memory needed to serve Gemini 2.5 Flash for inference, including a 20% overhead for activations and KV cache.
| Precision | VRAM needed | Smallest single GPU that fits |
|---|---|---|
| INT4 (4-bit) | 78.23 GB | NVIDIA H100 SXM5 (80 GB) |
| INT8 (8-bit) | 156.46 GB | NVIDIA B200 SXM (192 GB) |
| FP16 (16-bit) | 312.92 GB | Multi-GPU required |
| FP32 (32-bit) | 625.85 GB | Multi-GPU required |
Recommended GPU Configurations
Cheapest on-demand configurations to serve Gemini 2.5 Flash at 8-bit (156 GB VRAM).
10x NVIDIA T4
160 GB total VRAM · Turing · multi-node
~$5.00/h
2x AMD Instinct MI250X
256 GB total VRAM · CDNA 2
~$5.00/h
10x NVIDIA P100 SXM2
160 GB total VRAM · Pascal · multi-node
~$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 2.5 Flash?
With an estimated 140B parameters, Gemini 2.5 Flash needs roughly 156 GB of VRAM in 8-bit (INT8), 78 GB in 4-bit, and 313 GB in FP16, including a 20% overhead for activations and KV cache.
Which GPUs can run Gemini 2.5 Flash?
At 8-bit quantization, the most cost-effective option is 10x NVIDIA T4 (160 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 2.5 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 2.5 Flash in the cloud?
Renting 10x T4 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 10x T4 by the hour instead of buying hardware.
