Xiaomi Mimo v2-Flash is fantastic.

I have a relatively hard personal agentic benchmark, and Mimo v2-Flash scores 8% higher in 109 seconds for $0.003 (0.3 cents!) vs Haiku which took 262 seconds for $0.24 (24 cents)

Gemini 3.1 Flash Lite Preview (yes that is its name) is also a solid choice.