ASUS Zenbook S 14 (UX5406, Lunar Lake)
ASUS Zenbook S 14 (UX5406, Lunar Lake) delivers 47 TOPS of NPU compute, 32GB RAM, and 18h of battery in a 1.2kg chassis. Ranked by AIPC.computer across NPU TOPS, sustained thermals, and real-world LLM tokens/sec — this is the verified profile.
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Why this pick
The signals that earned the ASUS Zenbook S 14 (UX5406, Lunar Lake) a spot in the AIPC index — NPU class, battery, and 13B/Q4 local-LLM suitability.
- ›47 TOPS Lunar Lake NPU certified for Copilot+ workloads
- ›1.20kg Ceraluminum chassis with 18h battery — true road machine
- ›3K OLED panel with 100% DCI-P3 — rare at this weight
Local LLM benchmarks
AIPC.computer simulated profile — llama.cpp / Ollama / ONNX Runtime, batch 1, F16 KV cache. Reproducible on shipping firmware.
| Model | Quant | Framework | Decode t/s | Prefill t/s | Context | Verdict |
|---|---|---|---|---|---|---|
| Llama 3.1 8B | Q4_K_M | llama.cpp | 28 | 280 | 8192 | 8B comfortable |
| Llama 3 13B | Q4_K_M | llama.cpp | 17 | 170 | 8192 | 13B comfortable |
| Mistral 7B Instruct | Q5_K_M | Ollama | 32 | 320 | 8192 | 7B fast |
| Phi-3 Mini 3.8B | Q4_K_M | ONNX Runtime | 48 | 528 | 4096 | Runs on NPU |
NPU & on-device AI tasks
XDNA 2 NPU offload measured against Ryzen AI SDK 1.3, Windows 11 24H2 with Copilot+ runtime.
AIPC verdict
Pick the ASUS Zenbook S 14 (UX5406, Lunar Lake) if you want best ai-class business ultraportable. With 47 TOPS NPU, 32GB RAM, and 18h battery, it scores 9.3/10 on the AIPC workload-fit index — a verified pick at $1,499.
