DeepSeek-V4-Flash makes LLM steering interesting again

Ever since Golden Gate Claude I’ve been fascinated with “steering”: the idea that you can guide LLM outputs by directly manipulating the activations of the model mid-flight. DeepSeek V4 Flash I was inspired to write this post by antirez’s recent project DwarfStar 4, which is a version of llama.cpp that’s been stripped down to run only DeepSeek-V4-Flash. What’s so special about this model? It might be what many engineers have been waiting for: a local model good enough to compete with at least the low end of frontier model agentic coding. Since steering requires a local model, it’s now practical for many engineers to try it out for the first time. And indeed, antirez has baked steering into DwarfStar 4 as a first-class citizen. Right now it’s very rudimentary (basically just the toy “verbosity” example you can replicate via prompting), but the initial release was only eight days ago. I plan to follow this project closely. How steering works The basic idea behind steering is extracting…