Matthew Yang

@_matthewyang

PhD Student @mit_csail

Matthew Yang
@_matthewyang
Sep 4
Proud to have been part of the post-training team behind K2 Horizon. Give these models a try!
Institute of Foundation Models
@IFM_AI
Sep 3
Introducing K2 Horizon: a connected fleet of six foundation models ranging from 0.9 billion to 375 billion parameters. - Frontier performance: Across coding and agentic tasks, K2 Horizon delivers top-tier performance in every size class—with the 0.9B, 3.7B and 7B models setting
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Matthew Yang
@_matthewyang
Sep 2
Life update: I've started my PhD @MIT_CSAIL advised by @lateinteraction. Excited for what's about to come!! 🚀
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Matthew Yang
@_matthewyang
Jan 21
Almost nobody does proper credit assignment in RL-on-LLMs 💀 Learning only from the final outcome → punishes good steps 😭 → rewards bad steps 😭😭 🚨New Paper🚨 A new paradigm for credit assignment: LLMs identify their own mistakes ❌ and propose targeted fixes 🎯 🧵[1/n]
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Matthew Yang
@_matthewyang
Jun 12, 2025
🚨 NEW PAPER: What if LLMs could tackle harder problems - not by explicitly training on longer traces, but by learning how to think longer? Our recipe e3 teaches models to explore in-context, enabling LLMs to unlock longer reasoning chains without ever seeing them in training.
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