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Model: AtomicChat/lfm25-8b-a1b-GGUF
Source: Original Platform

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README.md

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+---
+license: other
+license_link: LICENSE
+thumbnail: https://huggingface.co/AtomicChat/lfm25-8b-a1b-GGUF/resolve/main/hero.png
+base_model:
+- LiquidAI/LFM2.5-8B-A1B
+base_model_relation: quantized
+quantized_by: AtomicChat
+pipeline_tag: text-generation
+library_name: gguf
+tags:
+- atomic-chat
+- lfm2.5
+- liquidai
+- gguf
+- llama.cpp
+- quantized
+---
+
+<center>
+
+<div style="display:flex; justify-content:center; align-items:center; gap:2%; max-width:560px; margin:0 auto;">
+<a href="https://atomic.chat" style="flex:0 1 auto; min-width:0;"><img src="https://huggingface.co/AtomicChat/lfm25-8b-a1b-GGUF/resolve/main/pill_atomic_v3.png" alt="Atomic Chat" style="width:100%; height:auto; max-width:186px;"></a>
+<a href="https://discord.gg/8wGSsvmg4V" style="flex:0 1 auto; min-width:0;"><img src="https://huggingface.co/AtomicChat/lfm25-8b-a1b-GGUF/resolve/main/pill_discord_v3.png" alt="Join Discord" style="width:100%; height:auto; max-width:184px;"></a>
+<a href="https://github.com/AtomicBot-ai/Atomic-Chat" style="flex:0 1 auto; min-width:0;"><img src="https://huggingface.co/AtomicChat/lfm25-8b-a1b-GGUF/resolve/main/pill_github_v3.png" alt="GitHub" style="width:100%; height:auto; max-width:141px;"></a>
+</div>
+
+<br/>
+
+<img src="https://huggingface.co/AtomicChat/lfm25-8b-a1b-GGUF/resolve/main/hero.png" alt="LFM2.5 8B A1B" style="width:100%; max-width:100%; height:auto; margin-bottom:0.6em;"/>
+
+<div style="display:flex; justify-content:center; gap:0.5em;">
+<a href="https://huggingface.co/LiquidAI/LFM2.5-8B-A1B"><strong>Base model: LiquidAI/LFM2.5-8B-A1B</strong></a>
+</div>
+</center>
+
+**LFM2.5 8B A1B**, self-quantized to GGUF by [Atomic Chat](https://atomic.chat). Built straight from Liquid AI's original weights with a per-tensor importance matrix, so this is not a repack of somebody else's files. Runs fully offline.
+
+## Highlights
+
+- **8.5B parameters**: the weights this repo quantizes.
+- **Context length**: 128,000 tokens (125K), as published by Liquid AI.
+- **24 layers**: Mixture-of-Experts.
+- **Full imatrix ladder**: every quant is calibrated with an importance matrix.
+- **On-device personal assistant**: Designed to power real-life applications, chaining tool calls, and following complex instructions on all devices.
+- **Compressed performance**: Competitive with much larger dense and MoE models on instruction following and agentic tasks.
+- **Unmatched throughput**: Fastest in its size class on both CPU and GPU inference, with day-one support for llama.cpp, MLX, vLLM, and SGLang.
+
+> [!NOTE]
+> These GGUFs are **self-quantized from the original weights**, not a repack. The importance matrix keeps low-bit quants closer to the full-precision model.
+
+> [!IMPORTANT]
+> Always pass `--jinja` so the **LFM2.5 8B A1B chat template** is applied. Without it the model can emit malformed turns.
+
+## Model Overview
+
+| Property | Value |
+|---|---|
+| Base model | `LiquidAI/LFM2.5-8B-A1B` |
+| Parameters | 8.5B |
+| Layers | 24 |
+| Experts | 32 routed (top-4) |
+| Context length | 128,000 tokens (125K) |
+| Vocabulary | 128,000 |
+| Modalities | Text |
+| Architecture | Mixture-of-Experts, 32 experts (top-4), 32 attention heads over 8 KV heads, `Lfm2MoeForCausalLM` |
+| This repo | GGUF quants (imatrix). Quants: `Q2_K`, `IQ3_M`, `Q3_K_M`, `Q3_K_L`, `IQ4_XS`, `Q4_K_S`, `Q4_K_M`, `UD-Q4_K_XL`, `Q5_K_S`, `Q5_K_M`, `Q6_K`, `Q8_0` |
+
+<img src="https://huggingface.co/AtomicChat/lfm25-8b-a1b-GGUF/resolve/main/benchmark.png" alt="LFM2.5 8B A1B benchmark scores" style="width:100%; max-width:900px;"/>
+
+Scores are Liquid AI's published results for the base `LiquidAI/LFM2.5-8B-A1B`, not our own measurements. Quantization preserves the large majority of this; `Q4_K_M` and up stay close to full precision.
+
+## Choosing a quant
+
+| Quant | Size | Notes |
+|---|---|---|
+| `Q2_K` | 3.2 GB | Smallest K-quant. Minimal RAM, clear quality drop. |
+| `IQ3_M` | 3.8 GB | Beats Q3 at a similar size thanks to imatrix. Best low-RAM pick. |
+| `Q3_K_M` | 4.1 GB | Low quality but usable. |
+| `Q3_K_L` | 4.4 GB | A step above Q3_K_M. |
+| `IQ4_XS` | 4.6 GB | Excellent quality for size. Recommended low-bit. |
+| `Q4_K_S` | 4.9 GB | Compact 4-bit, fast. |
+| **`Q4_K_M`** | 5.2 GB | **Recommended default. Best balance of size, speed and quality.** |
+| `UD-Q4_K_XL` | 5.2 GB | Dynamic. Embeddings and output kept at Q8_0 for higher quality at a Q4 footprint. |
+| `Q5_K_S` | 5.9 GB | Higher quality, slightly more compact than Q5_K_M. |
+| `Q5_K_M` | 6.0 GB | Higher quality, low loss. |
+| `Q6_K` | 7.0 GB | Near lossless, noticeably lighter than Q8_0. |
+| `Q8_0` | 9.0 GB | Effectively lossless, reference quality. |
+
+> [!TIP]
+> Pick the largest file that fits your (V)RAM with room for context. `Q4_K_M` or `UD-Q4_K_XL` is the sweet spot for most setups; `Q6_K` or `Q8_0` for maximum fidelity.
+
+## Get started
+
+Run LFM2.5 8B A1B locally with:
+
+- **[Atomic Chat](https://atomic.chat):** the easiest path. Open the app, search `AtomicChat/lfm25-8b-a1b-GGUF`, pick a quant, hit **Use this model**.
+- **llama.cpp:** `llama-server -hf AtomicChat/lfm25-8b-a1b-GGUF:Q4_K_M --jinja -c 8192`
+- **Ollama:** `ollama run hf.co/AtomicChat/lfm25-8b-a1b-GGUF:Q4_K_M`
+- **LM Studio / Jan:** search the repo id, download any quant.
+
+## Best practices
+
+| Parameter | Value |
+|---|---|
+| temperature | 0.2 |
+| top_k | 80 |
+| repetition_penalty | 1.05 |
+
+Liquid AI's recommended sampling configuration for `LiquidAI/LFM2.5-8B-A1B`.
+
+## Run in llama.cpp
+
+```bash
+git clone https://github.com/ggml-org/llama.cpp
+cmake llama.cpp -B llama.cpp/build -DBUILD_SHARED_LIBS=OFF -DGGML_CUDA=ON
+cmake --build llama.cpp/build --config Release -j --target llama-cli llama-server
+```
+
+```bash
+./llama.cpp/build/bin/llama-server \
+    -hf AtomicChat/lfm25-8b-a1b-GGUF:Q4_K_M \
+    --jinja -ngl 99 -c 8192 -fa on
+```
+
+## How these were made
+
+1. Download `LiquidAI/LFM2.5-8B-A1B` (original weights).
+2. Convert to f16 GGUF with [llama.cpp](https://github.com/ggml-org/llama.cpp).
+3. Build an importance matrix over our calibration corpus.
+4. Quantize the ladder with `--imatrix`.
+5. `UD-Q4_K_XL` additionally pins the token-embedding and output tensors to `Q8_0`.
+
+## License
+
+Original model by Liquid AI, released under the other license. Full terms: [other](LICENSE). Quantized by Atomic Chat.

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+  "rows": [
+    {"quant":"Q4_K_M","our_kld":"0.126876","our_agree":"82.896","our_ppl":"2.792977","uns_kld":"0.074829","uns_agree":"87.029","uns_ppl":"0.225532"}
+  ]
+}

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