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Show HN: Jev Plays Pokémon Red
The Hacker News thread on the completed Pokémon Red run, including the author adding nicknames as another Jev decision after a comment.
- Format
- Post
- Published by
- Community
- Author
- pancomplex
- Last verified
- Sep 2026
Works forJev for Realtime control
Used inJev for Gaming
Highlights
- 272 points and about 30 comments on 25 September 2026.
- Asked about nicknames, the author said Jev cannot invent original text, so he considered a list of names.
- He later replied that he added naming to the decision list and invited people to watch the next Pokémon get a name.
Watch out
Point totals move. The run itself is the separate landing page. No ROM is in the thread.
Questions about this entry
Short answers drawn from the linked project or page.
It loops. One commenter's verdict after watching: quick and cheap for a couple of minutes, then visibly bad decisions including entering and leaving the same door endlessly. The same commenter thinks the direction is right but the decisions are not there yet.
Nobody in the thread claims it does. One comment says there is no evidence the ceiling on classification tasks exceeds a frontier model with reasoning tokens, and places Jev at the cheap, fast end of that tradeoff rather than the capable end.
That is the strongest argument in the thread. One commenter says the telling moment was not a system playing Doom but changing a line to 'don't shoot, just dodge' and watching behavior change immediately, with decision graphs written in plain language at request time.
No. The author said Jev cannot invent original text, so naming had to be a fixed list of names to pick from. He later added naming to the decision list, which is the shape of the workaround: enumerate the options, then choose.
One commenter was briefly in awe of how quick and cheap it was, then saw how poor the decisions were and how it looped going in and out of the same door, calling it a technology heading the right direction but not there yet.
Changing part of the prompt to 'don't shoot, just dodge' changed the behaviour immediately, and decision graphs can be built on the fly by an LLM with plain-language instructions.
One commenter said Jev-style models sit on the Pareto frontier but at the cheap end rather than the good end, and saw nothing suggesting their upper bound exceeds a frontier LLM with reasoning tokens.
Reactions & coverage
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2 pointsShow HN: Minecraft PvP against DiffusionGemma-as-Jev, 24 ms per decisionRead the thread on Hacker NewsHacker News: Show HN: Jev finished a Pokémon Red run, with the Hall of Fame stats on the landing page.
pancomplex272 pointsShow HN: Jev Plays Pokémon RedRead the thread on Hacker NewsHacker News: Show HN: a mouse colony where each next move is Jev or a fixed rule.
1 pointShow HN: Jev-mice – mouse colony simulation using Jev and deterministic engineRead the thread on Hacker NewsMore Jev resources like this
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