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Device profile · Android

Best local LLMs for Samsung Galaxy S25 Ultra (16GB, 1TB config only)

Samsung Galaxy S25 Ultra (16GB, 1TB config only) has ~12 GB estimated usable for weights, cache and runtime; 80 of 161 tracked models fit at the estimated 4K baseline. Best tool: PocketPal AI.

79 fit with room 1 tight fit 81 too heavy
Usable memory
~12 GB
Estimated fits
80
Too large
81
Suggested fit
12B
Suggested fit Q4_K_M

Runs at Q4_K_M using ~8.9 GB of ~12 GB usable.

The suggested model uses recorded Arena scores where available, then estimated fit and speed. Score coverage is partial; it does not establish the best model for every task. Fit is an estimate, not a benchmark on this device.

Set up Gemma 3 12B on this device →

Estimated memory fits on Samsung Galaxy S25 Ultra (16GB, 1TB config only)

Compatible models 80 total

Best way to run models on Android

Runtime guide Android

Beginner: PocketPal AI, Polished app, download GGUF and run offline.

Power user: MLC LLM / LiteRT-LM, GPU/NPU acceleration paths for supported chips.

NPU acceleration is limited and chip-specific; most apps run on CPU. Expect 1B-4B class.

Full Android tool guide →

FAQ

What is the best local LLM for Samsung Galaxy S25 Ultra (16GB, 1TB config only)?

Gemma 3 12B is a suggested fit, using ~8.9 GB at Q4_K_M of the ~12 GB usable on Samsung Galaxy S25 Ultra (16GB, 1TB config only).

How much of Samsung Galaxy S25 Ultra (16GB, 1TB config only)'s memory can I use for a model?

About 12 GB. On a CPU-only machine, leave headroom for the OS and apps.

Which tool should I use on Android?

PocketPal AI (Polished app, download GGUF and run offline.) or MLC LLM / LiteRT-LM for speed. NPU acceleration is limited and chip-specific; most apps run on CPU. Expect 1B-4B class.

Compare nearby devices

Hardware with a similar usable pool, and how many of the 161 tracked models each runs next to Samsung Galaxy S25 Ultra (16GB, 1TB config only)'s 80.

Sources

Memory figures are estimates. See methodology.