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Best Network

There is no single “best net” for Leela but there a few worth recommending for various purposes. The most important consideration in choosing a net is picking the right size for your hardware and time controls (TC). In general, if you have a weak GPU (or no GPU at all) and you want to only spend milliseconds per move, then you want a smaller net that evaluates positions more quickly, i.e. higher NPS (nodes per second). On the other hand, if you have an RTX card (or several) and you want to run an analysis on a single move for hours at a time, then the quality of the evaluation is more important than the speed and a larger (but slower) net is probably going to work best.


  • <10b: Recommended for sparring vs humans
  • 10b: Recommended for running on CPU
  • 20b: Recommended for running on non-RTX cards or TC on the order of seconds (with RTX)
  • 24b: Recommended for TC > 1 minute per move with an RTX card
  • >24b: Recommended for long analysis or when speed isn’t a major factor

Network List

For nets of the same size, the first net listed is likely the strongest.

Size Name Source for Download Notes
5b x 48f Good Gyal 5 GitHub: dkappe Bad Gyal Other sizes also here
9b x 112f ID11258-112x9-se GitHub: dkappe Distilled Networks Other sizes also here
10b x 128f Latest T59 lczero.org run 2 networks Scroll past the T70 networks. A previous test run
10b x 128f Little Demon 2 data.lczero.org repository (LD2) JH nets also here
16b x 192f J20-460 GitHub: jhorthos Leela Training Trained on T40 data
20b x 256f SV-20b-t40-1541 Sergio-V repository Trained on T40 data
20b x 256f Leelenstein 14.0 Patreon: jjosh Early Access
20b x 256f T40: #42850 lczero.org run 1 networks Last T40 net
20b x 256f Leelenstein 12.2 12.2 Post No patreon required
24b x 320f Latest T60 lczero.org run 1 networks Current main run
24b x 320f J13B.2-136 GitHub: jhorthos Leela Training “Terminator 2” Net
30b x 384f SV-30b-t40-1705 Sergio-V repository Trained on T40 data

Note: The Sergio-V nets are also available on data.lczero.org in some cases.


“This is all too complicated. Just tell me what net to use!”

If you don’t care about squeezing out the very best performance for a particular situation and want a general-purpose net, pick a medium size 20b net, which should do reasonably well (if not optimal) under most common conditions.

As in the table above, the top-recommended 20b net is 256x20-t40-1541.pb.gz from Sergio Vieri’s repository.


If this page hasn’t been updated recently, check the Discord channels for a recommendation. Be sure to specify your hardware and use case so the helpful regulars know what to recommend.