Text generation · served with vLLM · ↓ 1.3K downloads a month · View on Hugging Face
Menlo/Jan-nano-128k needs about 12.5 GB of GPU memory for conversations of up to 8,192 tokens. It runs on one RTX A4000 from $0.11/h right now; best value: RTX 5090 at $0.69/h.
Weights
8.0 GB
GPU memory needed
about 12.5 GB
Conversation length
8,192 tokens
Model allows
131,072 tokens
Memory · disk
16 GB · 49 GB
Architecture
Qwen3ForCausalLM
Licence
apache-2.0
Versions of Jan-nano ~4.02B
The same model packaged differently: a quantized version needs less GPU memory and runs on a cheaper machine.
$0.69/h from your balance while it runs, billed by the hour; stop it from its page. GridPup rents the machine, which downloads the model from Hugging Face (usually ready in 10 to 15 minutes), and gives you an https address, keys and a Playground.
Questions
How much GPU memory does Jan-nano-128k need?
About 12.5 GB for conversations of up to 8,192 tokens: 8.04 GB of weights, the cache for one full-length conversation and the runtime's own memory.
What is the cheapest GPU to run Jan-nano-128k?
Right now one RTX A4000 at $0.11 an hour; RTX 5090 at $0.69 an hour is the best value for its speed. Prices are live offers from GPU clouds, checked every 15 minutes.
Can Jan-nano-128k run on an RTX 4090?
Yes: it needs about 12.5 GB and an RTX 4090 has 24 GB.
How do I deploy Jan-nano-128k as an API?
Pick a machine on its GridPup page and press Deploy: GridPup rents the GPU, downloads the model from Hugging Face and serves it at an https address with keys and OpenAI's chat API, billed by the hour.
Prices are per hour for the whole machine and its disk, right now. Speed is Vast's DLPerf score of the machine, relative to the cheapest. Best value: the most speed per dollar. Only machines with a Vast reliability above 95% that download at 400 Mbit/s or more are offered: the machine fetches the model itself.