LFM2.5-1.2B-Instruct ยท TPN-optimised GGUF

Quantised and measured by TPN Workbench from LiquidAI/LFM2.5-1.2B-Instruct @ 0f604ad. Every format is scored against the BF16 reference on next-token KL divergence, perplexity and top-1 agreement.

Full report: https://bench.trueperformancenetwork.com/r/DGiXiKCe9ZoZ9uoncS1v2A

TPN recommendation: Q6_K: Highest-fidelity format that fits 1 GB: 0.963 GB, closeness 0.008.

Files

file format size mean KLD KL similarity PPL ฮ” top-1
LFM2.5-1.2B-Instruct-Q4_K_M.gguf Q4_K_M 0.73 GB 0.0566 94.5 % -1.36 % 88.4 %
LFM2.5-1.2B-Instruct-Q5_K_M.gguf Q5_K_M 0.84 GB 0.0185 98.2 % +0.06 % 93.4 %
LFM2.5-1.2B-Instruct-Q6_K.gguf Q6_K 0.96 GB 0.0069 99.3 % +0.25 % 95.9 % TPN recommendation

Lower KLD = closer to the original. K-quants have SIMD kernels in llama.cpp WebAssembly and repacked ARM kernels on phones, so they are the faster pick on those devices.

Measurements

format size bpw mean KLD PPL ฮ” top-1
Q8_0 1.25 GB 8.5 0.0014 +0.61 % 98.0 %
Q6_K 0.96 GB 6.56 0.0069 +0.25 % 95.9 %
Q5_0 0.86 GB 5.5 0.0266 +2.31 % 92.0 %
Q5_0+ 0.86 GB 5.5 0.0266 +2.31 % 92.0 %
Q5_K_M 0.84 GB 5.64 0.0185 +0.06 % 93.4 %
Q4_0M+ 0.76 GB 4.79 0.0661 +1.00 % 87.7 %
Q4_K_M 0.73 GB 4.77 0.0566 -1.36 % 88.4 %
Q4_0 0.73 GB 4.5 0.0940 +8.18 % 85.3 %
Q4_0+ 0.73 GB 4.5 0.0940 +8.18 % 85.3 %
IQ4_XS 0.66 GB 4.25 0.0724 +2.02 % 87.1 %
Q3_K_M 0.60 GB 3.76 0.1582 +5.37 % 80.7 %
Q2_K 0.48 GB 2.86 0.5384 +27.09 % 66.5 %
IQ2_M 0.43 GB 2.62 0.5624 +29.30 % 66.0 %
IQ2_S 0.40 GB 2.38 0.6961 +46.13 % 62.2 %
IQ2_XS 0.40 GB 2.33 0.8351 +75.12 % 58.3 %
IQ2_XXS 0.37 GB 2.09 1.2455 +159.03 % 50.8 %

Task benchmarks

format ifeval
Q6_K 85.6
Q5_K_M 84.0
Q4_K_M 84.5

Gratis chat eval

32 everyday prompts (creative, instructions, reasoning, knowledge, tasks, de/es/fr, honesty, chat) ร— 3 samples with the Gratis system prompt and sampling, thinking off, graded 1-10 by Claude Sonnet; overall = mean of category scores ร—10. Run-to-run noise โ‰ˆ ยฑ2.

file overall
LFM2.5-1.2B-Instruct-Q4_K_M.gguf 61.8
LFM2.5-1.2B-Instruct-Q5_K_M.gguf 65.8
LFM2.5-1.2B-Instruct-Q6_K.gguf 65.0

Use

llama-server -hf tpnlabs/LFM2.5-1.2B-Instruct-TPN-GGUF --hf-file LFM2.5-1.2B-Instruct-Q6_K.gguf

Runs fully on-device in Gratis, in the browser or desktop app.

Licence: inherited from the base model (LFM Open License v1.0).

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