Harness: I made Jev control the player, has access to WASD, space, click, and mouse movements. Astra is the planner that sends instructions to Jev async. Learning: Each time the agent would fail, Astra would add skills as mjs files, that it can draw upon in different scenarios, Show more
Local Laya vs cloud Jev on Tetris
A video comparison of local Laya against cloud Jev on a Tetris agent, where the open-weights model made decisions 11 times faster on a 16 GB MacBook Air.
- Category
- Practices & Patterns
- Format
- Video
- Published by
- Community
- Author
- atomic.chat
- Added
- 2026-09-25
- Last verified
- 2026-09-25
Highlights
- Reports an open-weights System One model beating cloud Jev on Tetris with 11 times faster decisions.
- Ran locally on a 16 GB MacBook Air rather than a GPU host.
- The Tetris harness itself was built with Grok 4.7, per the post.
- Links to atomic.chat, an app for running models locally.
Watch out
A community comparison on a game task, not a controlled benchmark; speed depends on hardware and harness choices.
Reactions & coverage
Posts, threads, and videos about this entry from around the web.
Hacker News: Jev implemented in 25 lines of Python
bashbjorn400 points · 128 commentsJev in 25 Lines of PythonRead the thread on Hacker NewsHacker News: Kev: a tiny Jev-like family built on Qwen3.5
tosh458 points · 199 commentsKev: Tiny Jev-like family of decision models built on top of Qwen3.5Read the thread on Hacker NewsX: Jev plus Astra beats the Ender Dragon for under a dollar
X: Jev plays Pokémon Showdown
1/8 Saw Jev from @typesafeai on my feed, so I made it play Pokemon Showdown. Codex built the harness. It was damn fast. Its choices were a mixed bag. Full match, video 1/2. This is a saved replay with decision data, latency and added reading pauses.
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