Since Gemini 3.5 Flash is raising the price to $1.50/$9.00, it's priced between Haiku and Sonnet. If it outperforms Sonnet, it remains a good value, I guess. Though DeepSeek V4 Flash is much cheaper than all of them, and seemingly competitive.
Outside of coding, claude models are pretty meh. GPT and Gemini are the workhorses of science/math/finance.
They sure are not at thorough analysis or debugging, etc.