What GPU do I need to run meituan-longcat/LongCat-Flash-Chat?
561.9B parameters, published in BF16. View on Hugging Face
Set up LongCat-Flash-ChatLongCat-Flash-Chat is published by meituan-longcat on Hugging Face, with 33,984 downloads and 537 likes to date. It's a LongcatFlashForCausalLM model built for text-generation, published natively in BF16.
VRAM required & cheapest live GPU fit
Required VRAM = weight size at each precision, plus a fixed overhead for KV-cache, activations, and fragmentation. Full formula and assumptions: methodology.
| Precision | Weight size | Required VRAM | Cheapest live fit | GPUs needed | Est. $/hr (full fit) |
|---|---|---|---|---|---|
| BF16 | 1046.6 GB | 1255.9 GB | No capable live offer found | – | – |
| FP8 (quantized) | 523.3 GB | 627.9 GB | RTX PRO 6000 | 7 | $9.63/hr |
| INT4 (quantized) | 261.6 GB | 314.0 GB | RTX A6000 | 7 | $2.54/hr |
A GPU is only matched to a row if its hardware supports that precision, and the primary recommendation is always a single-GPU fit when one exists.
INT4 requires a quantized checkpoint actually published for this model, check its Hugging Face page before relying on this row.
LongCat-Flash-Chat: common questions
Can LongCat-Flash-Chat run on a single GPU?
Not on a desktop card. At BF16 it needs 1255.9 GB of VRAM, more than a single 32 GB desktop card holds. No card currently listed on the marketplace both supports BF16 and has enough VRAM for it, so how many it would take is not something this page can answer today.
Weight-to-VRAM math, the fit rules, and how live prices are normalized: full methodology.
More LongCat models
- LongCat-Flash-Lite-FP8 (69.1B, F8_E4M3)
- LongCat-Flash-Lite (69.1B, BF16)
Related reading: H100 pricing and specs, The best GPUs for AI, ranked, and Best GPU for LLM inference.
