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PACE: Periodic and Channel-Aligned Encoding of Four-Bit Recurrent States

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NEWS ABSTRACT10/22/2026 · one shared analysis

The paper proposes PACE, a quantizer for recurrent states in linear-attention-based language model layers. Because the state is materialized at chunk granularity rather than every token, rounding can be adapted to chunk size, allowing lower-precision (4-bit) states and aligning with KV buffering during decoding. Authors report that a 4-bit recurrent state with PACE achieves performance competitive with INT8 quantizers, with an 8-token buffer giving the headline results on a 4B model (average accuracy 79.1 and 79.6 against 80.8 full precision, per the author comment). Buffer length trades off accuracy against stored higher-precision bits.

Why it matters

Lower-precision recurrent states could reduce memory per sequence during decoding in linear-attention models, potentially enabling more concurrent sequences on accelerators.

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Source claims not independently checked; accuracy figures come from an author comment, and CPU/single-sequence speedups were not measured.

quantizationlinear-attentionrecurrent-statellm-inferencekv-cache

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