PostTrain Arena
PostTrain Arena is Contribute verifiable environments and explore evidence from post-training experiments.. It is ranked #5217 on the Dev Radar, in AI dev tools, first seen 16 days ago and shared in 2 posts (1.3k views).
PostTrain Arena · The open arena for post-training Skip to content PostTrain Arena ++ Co-launched with Hugging Face Read the launch post → The open arena for post-training Contribute a verifiable environment. Help build post-training experiments and measure what generalizes across eight domains. Enter the arena Read the Spec Open How we think Every submission runs the same function. You control exactly one variable: The score Δ is the score: the held-out pass rate after training minus before, in percentage points, both measured in the same run. A BenchFlow editor reviews each result, and the leaderboard ranks each collection by its mean Δ…
What people said about PostTrain Arena on X
hey Zuck, we are working with Meta/Pytorch team on the http://PostTrain.com through Open Env Committee. Do you think there's chance we can work together on the next episode? For this current episode we are using 27b models but we already dogfooded our infra for 500b+ models for the next episode in Nov. Dm'd you and…
— @xdotli, 15 days ago · 8 likes · see the post
made myself a tutorial on what it takes to post-train glm 5.3 flash all while my agents vibe rling go to https://posttrain.com for more
— @xdotli, 16 days ago · 0 likes · see the post
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PostTrain Arena in numbers
- Rank on the Dev Radar: #5217 of 8801
- Shared in 2 posts by 1 account: @xdotli
- 1.3k views on those posts
- First seen 16 days ago, last shared 15 days ago
- Pricing seen by AGK Intelligence: not stated
- Market: AI dev tools
FAQ
What is PostTrain Arena?
Contribute verifiable environments and explore evidence from post-training experiments. It was first shared on X 16 days ago and is ranked #5217 on the Dev Radar.
Is PostTrain Arena free?
Pricing is not stated on the page we read.
Who shared PostTrain Arena?
1 account on X, including @xdotli, in 2 posts totalling 1.3k 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. 31.2k posts from 5k X accounts over the last 21 days, 8.8k tools, 12 markets. New posts are collected several times an hour and the full ranking is recomputed every hour — last update 2026-10-30 21:12 UTC. Full method.