CASE FILE / Games & simulation
Jev VS Fable 5
Jev VS Fable 5.1 VS GPT-6 Astra: chess typesafe's new Jev V13 isn't an LLM. it doesn't chat, doesn't explain, doesn't write code — it only makes decisions. so we made it play blitz against frontier LLMs. the test: 5+0 blitz. every move is one API call. Jev V13 vs Fable 5.1: • fable outplayed it. by move 29 it was +16 in material and even promoted a second queen • but it kept burning 6-15 seconds per move on analysis. jev answered in ~2.6s • so fable didn't have enough time and lost Jev V13 vs Astra: • astra didn't bother winning on material. it mated jev in 18 moves. Qe1#, with 2:27 to spare
Original post
Jev VS Fable 5.1 VS GPT-6 Astra: chess typesafe's new Jev V13 isn't an LLM. it doesn't chat, doesn't explain, doesn't write code — it only makes decisions. so we made it play blitz against frontier LLMs. the test: 5+0 blitz. every move is one API call. Jev V13 vs Fable 5.1: • fable outplayed it. by move 29 it was +16 in material and even promoted a second queen • but it kept burning 6-15 seconds per move on analysis. jev answered in ~2.6s • so fable didn't have enough time and lost Jev V13 vs Astra: • astra didn't bother winning on material. it mated jev in 18 moves. Qe1#, with 2:27 to spare
Chinese translation
Jev VS寓言5.1 VS GPT-6阿斯特拉：国际象棋 typesafe的新Jev V13不是LLM。它不聊天，不解释，不写代码-它只做决定。所以我们让它和边境LLM玩闪电战 测试：5+0闪电战。一举一动都是一次API调用。 Jev V13 vs寓言5.1： ·寓言胜过它。第29步，材料上+16，甚至提拔了第二位女王 ·但分析时每次动作持续燃烧6-15秒。杰夫回答时间约为2.6秒 ·所以寓言没有足够的时间而迷失了 Jev V13 vs阿斯特拉： ·阿斯特拉并没有费心在材料上获胜。它以18个动作与杰夫对决。QE 1 #，还剩2：27
What this case shows
- Game state maps cleanly onto typed choices
- Let JEV pick; keep generation elsewhere
- The original post usually has a playable demo