OPEN MODELS / Language models (LLM)
Run gpt-oss-20b on a cloud GPU
gpt-oss-20b is a Language models (LLM) model by openai. See how much GPU memory it needs, which GPUs it fits on today and what it costs to run it yourself, billed per second.
GPUs it fits on today
Our estimate is about 27 GB for inference with U8 weights, including working memory. Real use depends on resolution, batch size and context length. With 4-bit quantization it needs about 17 GB.
| GPU | Memory | Per hour | 10 hours | |
|---|---|---|---|---|
| Q RTX 8000 | 45 GB | $0.48 | $4.80 | Rent |
| CMP 170HX | 64 GB | $0.62 | $6.20 | Rent |
| RTX 5000Ada | 32 GB | $0.69 | $6.90 | Rent |
| GB10 | 119 GB | $0.71 | $7.10 | Rent |
| A100 SXM4 | 80 GB | $0.72 | $7.20 | Rent |
Live starting prices from our catalog. You pay per second while the machine runs.
How to run gpt-oss-20b
- 01
Rent a GPU
Pick one of the GPUs above. Billing is per second; stop the machine and you stop paying.
- 02
Open a terminal or Jupyter
Connect over SSH or open Jupyter in your browser. PyTorch and CUDA are ready to use.
- 03
Download and run the model
Run the commands below. The weights download straight from Hugging Face to your machine.
pip install -U vllm
vllm serve openai/gpt-oss-20b --host 0.0.0.0 --port 8000Why run it yourself?
Your own LLM server has no per-token bill and no rate limit, and your data stays private. Pick a GPU by memory and serve the model with vLLM.
Questions
- How much GPU memory does gpt-oss-20b need?
- By our estimate about 27 GB for inference (21B parameters). Higher resolution, longer context or bigger batches need more.
- How much does it cost to run gpt-oss-20b?
- From $0.48 per hour on Q RTX 8000, billed per second. Ten hours cost about $4.80.
- Do I need a subscription?
- No. You pay only for the time your machine runs, from your USD balance. Stop it whenever you are done.
Try it on your own GPU in minutes
Pick a GPU, open Jupyter or SSH and run any open model. You pay per second and can stop anytime; no subscription, no setup fee.
- Per-second billing in USD
- PyTorch and CUDA ready in minutes
- Rent from ChatGPT or Claude too