Use the app's estimates as a starting point

GPT0 currently offers Qwen3.5 models at four sizes. The lightweight 0.8B option lists roughly 447 MB to download and 1.6 GB of GPU memory. The 2B option lists about 1.08 GB and 2.3 GB. The 4B and 9B options require substantially more space and memory.

These are app estimates, not a guarantee that a particular phone or laptop can load them. Other browser tabs, operating-system use, GPU capabilities, and runtime overhead affect the available resources. Total system RAM is not the same thing as memory available for this model.

Start with a reliable baseline

Try the lightweight model first on a constrained device. Complete a brief task before increasing the size. If the small model already handles your common edits or simple explanations well enough, a larger download may not improve your daily experience.

On a capable computer, the balanced model may be a reasonable baseline. Keep the prompt short and inspect the answer. Reliability matters: a model that repeatedly fails to load cannot help you, even if its architecture is more capable in another environment.

Compare one task, not a vague impression

Create two or three harmless prompts representative of your use: an email edit, an explanation you can fact-check, and a small code question. Give each model the same instructions. Record omitted facts, invented details, formatting errors, and how much correction you needed.

Do not assume model size guarantees a particular outcome. A larger model can still misunderstand a prompt, and a small model can perform a simple task well. Judge the tradeoff between usable answers and the resources required on your own device.

Example prompt
Turn the following notes into a five-item checklist. Preserve every named item, add no new facts, and mark missing deadlines as “not specified.”

Notes: [use the same short example for each model]

Switch deliberately

In GPT0, choosing another model in the selector does not make it active immediately. Load or switch to that model and wait for readiness. Finish or stop the current reply before switching, and save important results first.

If a larger model fails, return to the smaller one and simplify the task. Bigger inputs and bigger models both increase demands; changing both at once makes troubleshooting harder. A reliable small setup with a clear prompt is often the better starting point.

About this guide

Original examples are illustrative. This is AI-assisted content maintained for GPT0, not an independent product benchmark. Read our editorial approach.

Try a small task in GPT0

Start with a short prompt. Your device runs the model; WebGPU support and an initial download are required.

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