Justin Yang Chae
Justin Yang Chae is I built PretrainGym during the Prime Intellect RL Residency to test one narrow piece of recursive self-improvement: given a fixed model implementation and a token budget, can a coding agent choose the data? Across…. It is ranked #2579 on the AI Radar, in AI coding agents, first seen 16 days ago and shared in 1 post (914 views).
PretrainGym: can an agent curate pretraining data? | Justin Yang Chae Skip to content justin@uw:~/blog$ cat pretraingym.mdx PretrainGym: can an agent curate pretraining data? research agents pretraining-data evals 2026-10-20 · 10 min read Read the thread on X kimi-k3 · kimi code · pretraingym [pause] [restart] [00:06] kimi-k3 › “Schema validates. Now launching a full-budget self-score run in the background to get the baseline loss and learn the eval set’s per-source composition.” [00:07] ▸ self_score (fineweb-edu 100%, 400M) [01:32] ✓ val_loss 3.4286 · reward 0.9608 [01:32] kimi-k3 › “Only aggregate stats are exposed — the eval composition…
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Justin Yang Chae in numbers
- Rank on the AI Radar: #2579 of 10402
- Shared in 1 post by 1 account: @dejavucoder
- 914 views on those posts
- First seen 16 days ago, last shared 16 days ago
- Pricing seen by AGK Intelligence: not stated
- Market: AI coding agents
FAQ
What is Justin Yang Chae?
I built PretrainGym during the Prime Intellect RL Residency to test one narrow piece of recursive self-improvement: given a fixed model implementation and a token budget, can a coding agent choose the data? Across… It was first shared on X 16 days ago and is ranked #2579 on the AI Radar.
Is Justin Yang Chae free?
Pricing is not stated on the page we read.
Who shared Justin Yang Chae?
1 account on X, including @dejavucoder, in 1 post totalling 914 views.
Every post is read and classified by AGK Intelligence: what it is, which market it belongs to, and whether the link is a real tool. 65.6k posts from 5k X accounts over the last 14 days, 10.4k tools, 19 markets. New posts are collected several times an hour and the full ranking is recomputed every hour — last update 2026-11-06 15:10 UTC. Full method.