I've been testing the models against data analysis tasks, and found that the recent Luna & Haiku releases from the last month have really reset the narrative around price x quality.

DeepSeek 4.1 Flash is really is 10x cheaper than Opus, but it's in the same ballpark as Luna & Haiku in terms of quality, cost, and speed for data analysis. (Luna & Haiku actually perform marginally better, cheaper, and faster).

Here's a breakdown: https://plotly.com/blog/deepseek-v4-1-flash-data-analysis-be...

Note that this benchmark is for data analysis, not general software development. So the tasks are shorter and more constrained.