I am using DeepSeek Harness[0] (switched from OpenCode) and I am using DeepSeek directly via the API. The speed is insane. Like 200 tokens/second is the norm but I have seen much higher too at times.

PS: I do not know why but opencode pushes CPU usage to very high which has NOT happened with DeepSeek harness even once.

[0]. https://github.com/deepseek-ai/deepseek-harness