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Leanstral: Open-source agent for trustworthy coding and formal proof engineering

mistral.ai

31–40 of 234 posts

Re: Leanstral: Open-source agent for trustworthy coding and formal proof engineering

#31
post #30

I don’t know a single person using Mistral models.

Me neither, they're not ready for prime imo. I have a yearly sub and the product is just orders of magnitude behind Anthropic's offering. I use Code for real world stuff and I am happy with the result, Mistral is just not something I can trust right now.

Re: Leanstral: Open-source agent for trustworthy coding and formal proof engineering

#33
post #26

Curious if anyone else had the same reaction as me This model is specifically trained on this task and significantly[1] underperforms opus. Opus costs about 6x more. Which seems... totally worth it based on the task at hand. [1]: based on the total spread of tested models

Agreed. The idea is nice and honorable. At the same time, if AI has been proving one thing, it's that quality usually reigns over control and trust (except for some sensitive sectors and applications). Of course it's less capital-intense, so makes sense for a comparably little EU startup to focus on that niche. Likely won't spin the top line needle much, though, for the reasons stated.

EU could help them very much if they would start enforcing the Laws, so that no US Company can process European data, due to the Americans not willing to budge on Cloud Act.

That would also help to reduce our dependency on American Hyperscalers, which is much needed given how untrustworthy the US is right now. (And also hostile towards Europe as their new security strategy lays out)

Re: Leanstral: Open-source agent for trustworthy coding and formal proof engineering

#36
post #3

Trustworthy vibe coding. Much better than the other kind! Not sure I really understand the comparisons though. They emphasize the cost savings relative to Haiku, but Haiku kinda sucks at this task, and Leanstral is worse? If you're optimizing for correctness, why would "yeah it sucks but it's 10 times cheaper" be relevant? Or am I misunderstanding something? On the promising side, Opus doesn't look great at this benc…

It’s really not hard — just explicitly ask for trustworthy outputs only in your prompt, and Bob’s your uncle.

Assuming that what you're dealing with is assertable. I guess what I mean to say is that in some situations is difficult to articulate what is correct and what isn't depending in some situations is difficult to articulate what is correct and what isn't depending upon the situation in which the software executes.

Re: Leanstral: Open-source agent for trustworthy coding and formal proof engineering

#37
post #23

The real world success they report reminds me of Simon Willison’s Red Green TDD: https://simonwillison.net/guides/agentic-engineering-pattern... > Instead of taking a stab in the dark, Leanstral rolled up its sleeves. It successfully built test code to recreate the failing environment and diagnosed the underlying issue with definitional equality. The model correctly identified that because def creates a rigid definit…

TDD == Prompt Engineering, for Agentic coding tasks.

Re: Leanstral: Open-source agent for trustworthy coding and formal proof engineering

#39
I absolutely called this a couple of weeks ago, nice to be vindicated!

> I'm interested to see what it is in the age of LLMs or similar future tools. I suspect a future phase change might be towards disregarding how easy it is for humans to work with the code and instead focus on provability, testing, perhaps combined with token efficiency.

> Maybe Lean combined with Rust shrunk down to something that is very compiler friendly. Imagine if you could specify what you need in high level language and instead of getting back "vibe code", you get back proven correct code, because that's the only kind of code that will successfully compile.

https://news.ycombinator.com/item?id=47192116

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