LFM2.5-24B-A2B APEX GGUF

APEX (Adaptive Precision for EXpert Models) quantizations of LFM2.5-24B-A2B by LiquidAI.

Brought to you by the LocalAI team | APEX Project | Technical Report

Benchmark Results

Perplexity is measured on wikitext-2-raw. KL divergence is measured against the BF16 model on the same text. HellaSwag and Winogrande use 400 tasks each, zero-shot. The LiquidAI rows are the quantizations published by LiquidAI, measured the same way. Perplexity differences of about 0.2 are close to the measurement error (+/- 0.14).

Model Size (GiB) Perplexity KL vs BF16 (mean) HellaSwag Winogrande
APEX I-Quality 14.3 15.99 0.077 69.5 61.8
APEX Quality 14.3 16.36 0.083 67.2 60.2
APEX I-Balanced 16.1 15.93 0.060 67.5 62.5
APEX Balanced 16.1 16.20 0.065 66.2 62.0
APEX I-Compact 10.4 16.20 0.219 66.8 62.8
APEX Compact 10.4 16.83 0.266 65.2 65.0
APEX I-Mini 8.5 16.43 0.436 63.0 62.2
APEX I-Nano 7.1 17.55 0.567 62.2 63.8
LiquidAI Q8_0 23.7 15.94 n/a 67.0 63.0
LiquidAI Q5_K_M 15.8 15.70 0.092 68.0 62.5
LiquidAI Q4_K_M 13.5 15.94 0.164 65.5 63.0

Only these benchmarks were run. No MMLU, ARC or TruthfulQA numbers are claimed.

What is APEX?

APEX is a quantization strategy for Mixture-of-Experts (MoE) models. It classifies tensors by role (routed expert, shared expert, attention) and applies a layer-wise precision gradient: edge layers get higher precision, middle layers get more aggressive compression. The I-variants use imatrix-guided quantization.

See the APEX project for details and the technical report.

Files

File Size
LFM2.5-24B-A2B-APEX-I-Quality.gguf 14.3 GiB
LFM2.5-24B-A2B-APEX-Quality.gguf 14.3 GiB
LFM2.5-24B-A2B-APEX-I-Balanced.gguf 16.1 GiB
LFM2.5-24B-A2B-APEX-Balanced.gguf 16.1 GiB
LFM2.5-24B-A2B-APEX-I-Compact.gguf 10.4 GiB
LFM2.5-24B-A2B-APEX-Compact.gguf 10.4 GiB
LFM2.5-24B-A2B-APEX-I-Mini.gguf 8.5 GiB
LFM2.5-24B-A2B-APEX-I-Nano.gguf 7.1 GiB

Architecture

  • Model: LFM2.5-24B-A2B (lfm2_moe) by LiquidAI
  • Layers: 40 (30 convolutional + 10 full attention, hybrid), the first 2 dense
  • Experts: 64 routed, 4 active per token
  • Total parameters: about 24B
  • Active parameters: about 2B per token

Run with LocalAI

local-ai run mudler/LFM2.5-24B-A2B-APEX-GGUF@LFM2.5-24B-A2B-APEX-I-Balanced.gguf

Credits

APEX is brought to you by the LocalAI team. Developed through human-driven, AI-assisted research. Built on llama.cpp.

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