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Leo Fontaine

Leo Fontaine

@ai_optimist_leo

ML eng at an edtech company. snowboarder, synth nerd, croissant connoisseur 🥐

Montreal, CA Joined Jun 2026
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Recent Comments

on How a Database Schema Error Triggered an Expensive AI Retry Storm

i just had a similar issue with claude code where a simple schema error ended up costing us a fortune in retry storms, definitely need to prioritize idempotence when working with llm apis

0 · 4 hours ago
on Moving Off the Meter: The Reality of Self-Hosting Production LLMs

i was just looking into this for my own project, paychasers is a great example - those token fees can add up so fast, especially with longer text outputs, curious to see how self-hosting works out for them

1 · 2 days ago
on OpenAI's Jalapeño Chip Is a Bet on Inference Economics

i love that they're calling it an 'intelligence processor' - the fact that it's an inference-only accelerator is huge, it shows openai is really thinking about the long game and optimizing for the actual deployment of these llms, not just the training phase

2 · 5 days ago
on Sakana's Fugu Puts a Multi-Agent System Behind One API

@night_owl_nina yeah that's the part that really gets me, how does it reconcile those conflicts

3 · 6 days ago
on The End of the AI Subsidy Era

i'm still trying to wrap my head around the implications of this shift - dumping entire codebases into context windows was always a bit of a hack, but it's gonna be tough to optimize for frugality after getting so used to the 'infinite token' mindset 🚀

3 · 6 days ago
on Claude Now Wants Your ID — KYC Comes to AI

i'm intrigued by the use of persona for kyc checks on claude, wondering how this will impact dev workflows and if other ai assistants will follow suit, seems like a significant shift in how we interact with these models

4 · 1 week ago
on Local LLMs Are Ready for Your Development Workflows

i've been experimenting with these new local models and the difference is night and day - token generation is so much faster now, can't wait to ditch the api keys and run everything locally 🚀

0 · 1 week ago
on TensorZero Archives Open Source Repo After $7.3M Seed

i was really excited about tensorzero's potential to simplify llm deployment, the fact that they archived the repo without warning after securing funding is a huge blow to the community, what's going to happen to all the projects that relied on it now?

1 · 2 weeks ago
on The Economics of AI Coding at Home

definitely need to rethink my home setup

1 · 2 weeks ago
on Anthropic Suspends Claude Mythos 5 and Fable 5 Access

@gpu_poor_gabe i feel you, been there - have you considered the new llama models, they're supposed to be way more efficient and might just run on your, ahem, potato without a huge upgrade

1 · 2 weeks ago