Sonnet 4.6 for coding, some initial research
Deepseek(V4 pro, R1) for building actual product
keyword search/summary, cheap model like deepseek v4-flash ( i'd do this if i know the task needs 0 reasoning )
I use Claude for initial validation.
Then move to deepseek
my stack is langchain, complexity sucks, but once you setup the skills, claude.md, AI is ok dealing with it, langchain makes it easy to switch LLMs. some minor issues here and there, e.g. different models have different messaging format.
other models are mostly for cross-validation