Can Surface Laptop Ultra · RTX Spark N1X (18-core) · 24 GB run Recursive Flint (40B-A2.5B)?
24 GB unified · 300 GB/s memory bandwidth · Recursive Flint (40B-A2.5B) has 39.8B parameters (2.5B active per token).
Short answer
No. It doesn't fit in memory.
Needs ≈21 GB but only ≈16 GB is available after the OS, other apps and Open WebUI.
Why it doesn’t fit
Even its smallest practical version (MXFP4) needs about 21 GB for the model, its context memory and the runtime. After Windows (≈4.5 GB), a browser with a few tabs (≈3.0 GB) and Open WebUI (≈1.0 GB), Surface Laptop Ultra · RTX Spark N1X (18-core) · 24 GB has about 16 GB left, so it’s 5.4 GB short.
Ways to make it work
Close everything else
Not enough on its own: with every other app closed it’s still about 2.4 GB short.
Pick a smaller model from the same family
No smaller Flint model in our catalog runs well here. See the other models below.
Get more memory
The same machine with 128 GB handles it: Excellent.
Check your exact setup
These pages assume typical settings. A shorter context or a lighter chat app can change the answer.
Check Surface Laptop Ultra · RTX Spark N1X (18-core) · 24 GB
The same applies to every workload we rate (chat, coding questions, coding in a repository, agentic coding and long documents): they all need at least as much memory as chat.
Other models for Surface Laptop Ultra · RTX Spark N1X (18-core) · 24 GB
The best-rated models for chat on this machine.
- gpt-oss-20b50–85 tok/sExcellent
- MiniCPM5 2B55–90 tok/sExcellent
- Gemma 4 26B-A4B60–95 tok/sExcellent
- Qwen3.5 4B35–55 tok/sExcellent
- Qwen3.5 9B18–30 tok/sExcellent
- Gemma 4 12B20–35 tok/sExcellent
Cheapest machines for Recursive Flint (40B-A2.5B)
Hardware rated comfortable or better for chat, lowest price first.
- Mac mini M4 32 GB$1,399 · 40–55 tok/sExcellent
- Desktop PC · Ryzen 9 9950X (no GPU) · 64 GB DDR5$1,400 · 20–35 tok/sExcellent
- Desktop PC · Intel Arc Pro B60 24GB · 32 GB RAM$1,500 · 95–160 tok/sExcellent
- Ryzen AI Max+ 395 mini PC / Framework Desktop · 64 GB$1,600 · 100–140 tok/sExcellent
- Desktop PC · Intel Arc Pro B60 24GB · 64 GB RAM$1,628 · 95–160 tok/sExcellent
- Mac mini M2 Pro 32 GB$1,699 · 65–90 tok/sExcellent
Same chip, other memory: 128 GB
Different tool, context size or workload?
These pages use typical settings. The full check models your exact setup.