It's funny because I just took a break from it to read some hn and found this post.
I was surprised: even tho it was the cheapest option (against other small models from Anthropic) it performed the best in my benchmarks.
I've also used Devstral Small to make a simple raytracer[5][6] (it was made using the "classic" chat by copy/pasting code, not any agentic approach and i did fix bits of it in the process) and a quick-and-dirty "games database" in Python+Flask+Sqlite for my own use (mainly a game backlog DB :-P).
I also use it to make various small snippets, have it generate some boilerplate stuff (e.g. i have an enum in C and want to write a function that prints names for each enum value or have it match a string i read from a json file with the appropriate enum value), "translate" between languages (i had it recently convert some matrix code that i had written in Pascal into C), etc.
[0] https://i.imgur.com/f4OrNI5.png
[1] https://i.imgur.com/Zac3P4t.png
[2] https://i.imgur.com/jPYYKCd.png
[3] https://i.imgur.com/WZGfCdq.png
[4] https://i.imgur.com/ytYkyQW.png
[5] https://i.imgur.com/FevOm0o.png (screenshot)
[6] https://app.filen.io/#/d/e05ae468-6741-453c-a18d-e83dcc3de92... (C code)
Works really well. Extracts companies you have dealt with, people, topics, events, locations, financial transactions, bills, etc.