TIS-100 Bench: Signal Edge Detector

32050 Easy Streaming state Arithmetic construction Built-in puzzle · TIS-100 Bench report →

Compare each value with its predecessor and flag changes of at least 10. The first output is always zero.

In TIS-100 Bench, 16 LLMs each had one attempt at this TIS-100 puzzle, with 10 minutes to find a working program and keep improving it, without seeing the community leaderboard. 14 of 16 models solved it. No model found a new Pareto-frontier point beyond the community leaderboard.

14 / 16models solved it
204best LLM cycles (102 community)
0new frontier points

Records

ScoreCommunity bestBest LLMModel
Cycles102204GPT-6.1 Sol · +100%
Nodes44DeepSeek V4.1 Flash Ties record
Instructions1415Fable 5.1 · +7%

Community records from the community leaderboard when we froze it. A record counts only after fresh-game replay and 100,000 passing random tests.

Pareto frontier

Pareto explorer

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Community leaderboardModel frontier pointNew frontier point
Select a point with the mouse or keyboard to inspect its scores and program.

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Every model

ModelSolvedBest cyclesBest nodesBest instructionsNew frontier points
01GPT-6.1 SolYes204418—
02Opus 5.5Yes204415—
03GPT-6 AstraYes214415—
04Sonnet 5.5Yes214415—
05Fable 5.1Yes222415—
06Gemini 3.8 FlashYes231415—
07Gemini 4 ArgonYes241415—
08Haiku 5.5Yes241418—
09Kimi K3.1 ProYes244422—
10Muse Spark 1.3Yes244416—
11DeepSeek V4.1 FlashYes245420—
12Muse Wonder 1.0Yes245415—
13GPT-6 LunaYes280420—
14Grok 4.7Yes322521—
15GLM-5.3No————
16MiMo-V2.6-ProNo————

Best scores can come from different programs. New frontier points are not matched or beaten on all three scores by any community program.

Best model programs

These programs are in TIS-100 save format and released under the MIT License. All of this puzzle’s model programs are on GitHub and Hugging Face.

GPT-6.1 Sol Fewest cycles

204 cycles · 6 nodes · 30 instructions32050.204-6-30.txt on GitHub

GPT-6.1 Sol program running on 32050 in TIS-100
Node 1
MOV UP ACC
MOV ACC RIGHT
MOV ACC DOWN
Node 2
MOV LEFT ACC
SUB LEFT
MOV ACC DOWN
Node 5
MOV UP NIL
MOV 0 DOWN
L: MOV UP ACC
SUB UP
MOV ACC DOWN
JMP L
Node 6
L: MOV UP ACC
JGZ P
NEG
P: SUB 10
JLZ Z
MOV 1 DOWN
JMP L
Z: MOV 0 DOWN
Node 8
L: MOV UP ACC
JGZ P
NEG
P: SUB 10
JLZ Z
MOV 1 RIGHT
JMP L
Z: MOV 0 RIGHT
Node 9
MOV LEFT DOWN
MOV UP DOWN

GPT-6 Astra Fewest nodes

238 cycles · 4 nodes · 18 instructions32050.238-4-18.txt on GitHub

GPT-6 Astra program running on 32050 in TIS-100
Node 1
MOV UP ACC
L:MOV ACC DOWN
MOV UP ACC
MOV ACC DOWN
JMP L
Node 5
MOV UP ACC
SUB UP
MOV ACC RIGHT
Node 6
MOV LEFT ACC
JGZ P
NEG
P:MOV ACC DOWN
Node 9
Z:MOV 0 DOWN
L:MOV UP ACC
SUB 10
JLZ Z
MOV 1 DOWN
JMP L

Gemini 4 Argon Fewest instructions

272 cycles · 4 nodes · 15 instructions32050.272-4-15.txt on GitHub

Gemini 4 Argon program running on 32050 in TIS-100
Node 1
MOV UP, DOWN
Node 5
MOV UP, ACC
MOV ACC, DOWN
MOV ACC, DOWN
Node 8
SUB UP
MOV ACC, RIGHT
MOV UP, ACC
Node 9
L: MOV LEFT, ACC
JGZ P
NEG
P: SUB 10
JLZ Z
MOV 1, DOWN
JMP L
Z: MOV 0, DOWN