PSA: Qwen 3.5 Requires BF16 KV Cache, NOT F16
A warning for those running Qwen 3.5 locally with llama.cpp: the KV cache needs to be manually set to BF16 (bfloat16) instead of the default FP16 (float16). Perplexity tests on wikitext-2-raw confirm that official Qwen-team implementations, like vLLM...