HorizonAI-230M ยท QAD-Q4_0 GGUF

HorizonAI-230M is a full-parameter SFT + QAT fine-tune of LiquidAI/LFM2.5-230M, trained on-device (Apple Silicon, MLX) for multilingual instruction following.

This repository ships the QAD-style Q4_0 build: the model was trained with a bit-exact straight-through-estimator simulation of llama.cpp Q4_0 round-to-nearest quantization (blocks of 32, d = signed_extremum / -8, half-up rounding, fp16 scales), so the quantized weights you run are exactly what the model was optimized for. Embeddings are quantized to Q6_K (mirroring LiquidAI's official QAD layout). No importance-matrix / calibration is involved.

File

File Quant Size
HorizonAI-230M-QAD-Q4_0.gguf Q4_0 (+ Q6_K embedding) 142 MB

Training

  • Base: LiquidAI/LFM2.5-230M (BF16)
  • Data: ~73k instruction samples โ€” smol-constraints, Tulu-3 persona-IF, smol-rewrite, smol-magpie-ultra, OpenHermes, APIGen function calling, MetaMathQA, everyday conversations, plus Italian (ita_chat, ~10k) and language-balanced multilingual data (it/es/pt/fr/de quotas) to prevent language drift
  • Recipe: full fine-tune (bf16 master, AdamW, warmup+cosine), stage 1 SFT, stage 2 QAT (70%) with fake-quant active; loss on assistant turns only, tokenization aligned with inference-time rendering
  • Hardware: Apple M4 (16 GB), MLX, ~5 h

Results (measured, same harness for every model)

32 machine-checked instruction-following prompts (EN+IT, incl. 8 language-fidelity checks) at temp 0.1 / top-k 50 / rep-penalty 1.05; perplexity on wikitext-2 test (llama-perplexity, 200 chunks, ctx 2048).

Model Size IF-score Languages (it/fr/es/pt/de) PPL
HorizonAI-230M-QAD-Q4_0 142 MB 40.6% 5/5 35.6
LFM2.5-230M Q6_K (stock) 182 MB 40.6% 4/5 47.9
LFM2.5-230M Q6_K official 182 MB 37.5% 4/5 47.9
LFM2.5-230M QAD-Q4_0 official 142 MB 28.1% 3/5 45.0

Chinese/Japanese/Korean remain at base-model level (no targeted SFT data).

Usage

llama-cli -m HorizonAI-230M-QAD-Q4_0.gguf --chat-template ...

Runs in llama.cpp, LM Studio, and any GGUF runtime with lfm2 architecture support.

License & attribution

This model is a derivative work of LiquidAI/LFM2.5-230M and is redistributed under the LFM Open License v1.0 (see NOTICE). The fine-tuning was performed by Dylan Succi for the HorizonAI / TravelApp project. Commercial use is permitted under the license's revenue threshold (< $10M annual revenue).

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