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Reasonix is a terminal AI coding agent designed specifically for DeepSeek API prefix caching mechanism, achieving ultra-low token costs in long sessions through a cache-first architecture. In testing, 435 million input tokens cost only about $12, with a cache hit rate of 99.82%.
This paper introduces sparse prefix caching for hybrid and recurrent LLMs, which stores recurrent states at a limited set of checkpoint positions to avoid dense caching while minimizing recomputation. The method outperforms standard heuristics on real-world data, especially when requests share substantial but non-identical prefixes.