โš ๏ธ STOCK llama.cpp WILL NOT LOAD THESE

The ROCmFP4 / ROCmFPX quant types exist only in charlie12345/ROCmFPX โ€” stock llama.cpp reports invalid ggml type. Ignore the auto-generated "Use this model" commands above.

LFM2-24B-A2B โ€” ROCmFP4 / ROCmFPX GGUF

The first ROCmFP4 quantizations of LFM2-24B-A2B. Built for AMD gfx1151 (Ryzen AI MAX+ 395 / Strix Halo). 40 layers ยท hidden 2048 ยท 64 experts, ~2B active.

Quantized from BF16 GGUF โ€” a lossless source, not a requantization of a lower-bit build.

All four quants โ€” pick by size, not by hoping

file ftype size bpw decode (median of 3) runs best for
Q4_0_ROCMFP4_COHERENT 102 12.54 GiB 4.52 95.24 95.37 / 94.90 / 95.24 smallest โ€” best fit for a 128 GB Strix Halo
Q6_0_ROCMFPX_AGENT 114 20.47 GiB 7.37 67.51 67.80 / 67.51 / 67.20 agent/tool-call routing at 6-bit
Q8_0_ROCMFPX 111 22.92 GiB 8.26 67.37 67.62 / 67.33 / 67.37 highest fidelity, plain routing
Q8_0_ROCMFPX_AGENT 115 23.26 GiB 8.38 66.53 66.53 / 66.53 / 66.50 highest fidelity + agent routing

Measured on a Ryzen AI MAX+ 395 (gfx1151, ROCm), -ngl 999 -c 4096 -fa on -fit off, median of 3 with warm-up discarded on an otherwise-idle box.

Correctness: 3/3 on every quant โ€” 17x23 => 391 - capital of Japan => Tokyo - days in 2024 => 366 (max_tokens 1024)

Speculative decoding: None. No MTP / EAGLE / nextn tensors, so there is no speculative speedup to enable and no acceptance length to quote. Source: LiquidAI/LFM2-24B-A2B-GGUF BF16.

โ„น๏ธ Why no "4-bit AGENT"? The AGENT recipes exist only at 3-bit (113), 6-bit (114/117) and 8-bit (115) โ€” the entire 4-bit family (100โ€“106) has no AGENT variant. Rather than hand-roll one and publish it under a name implying it is standard, the 6-bit Q6_0_ROCMFPX_AGENT fills that slot. AGENT routing keeps more tensors at higher precision for tool-call coherence.

โ„น๏ธ Head protection. These GGUFs contain no separate output.weight โ€” the embedding is tied โ€” so --token-embedding-type is what protects the head here and --output-tensor-type is a no-op. Audited in the finished files: token_embd is Q6_K on the 4-bit build and Q8_0 on the 6/8-bit builds.


What was NOT measured

  • No perplexity run, and no quality A/B against the BF16 source.
  • No long-context testing. ยท No tool-calling evaluation โ€” note the AGENT builds are named for tool-call routing but we did not benchmark tool use.

Base model licence inherited; all credit for the weights goes to Liquid AI.

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