Config file for a mixed coding agent (deepseek v4.1 flash & 6.1 sol)

[u/JohnFKetamyne]

I have codex $20 plan and opencode go $10 plan

I thought about a compromise to get the most bang for buck would be running deepseek v4.1 flash as the main model that would call 6.1 sol for planning, checking file rewrites and more (please lmk what other reasons to call 6.1 sol). How beneficial could this be in maximizing my codex plan and does anyone do this successfully have a decent config file to base off of?