LFM3-1.7B Uncensored โ€” GGUF (by AtomicChat)

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  • Built by the team behind Atomic Chat, the app that runs open-weight models locally and offline.

Safety-ablated GGUF of LiquidAI/LFM3-1.7B. A projected rank-1 LoRA (direction = mean harmful โˆ’ mean harmless activations, with the harmless component projected out) is baked into the weights at W*=2.0, then AD-quantized.

What changed (measured)

metric base uncensored
refusals on harmful prompts 61.7% 0.0%
false refusals (XSTest) 5.2% 0.0%
MMLU (2000 q) 41.0% 41.0% (McNemar p=1.0 โ€” no drop)
needle (long context) 3/3 3/3
ฮ”KLD vs base (neutral) โ€” +0.019

A random edit of the same size dropped MMLU 1.3pp and had a larger ฮ”KLD (0.028), so the targeted direction is both more effective and less damaging. Thinking-loop and empty-output checks pass at W*=2.0.

Rungs

Rung GB on disk bpw
AD-Q6_K 1.6 7.31
AD-Q4_K_M 1.1 5.20

Run (llama.cpp)

Needs a build with LFM3 support (merged in llama.cpp #31252; produced at llama.cpp 19cce69).

llama-cli -hf AtomicChat/LFM3-1.7B-Uncensored-GGUF:AD-Q4_K_M -p "Hello"

Base model & license

Base model: LiquidAI/LFM3-1.7B. License: LFM Open License v1.0 (see LICENSE). This removes safety refusals; use responsibly and in line with the base license.

Quants by AtomicChat.

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