TIS-100 Bench: Signal Prescaler

NEXUS.05.647.1 Medium Arithmetic construction Routing & synchronization Built-in puzzle · TIS-100 Bench report →

Emit each input divided by 2, 4, and 8. Sharing intermediate work can save instructions and communication.

In TIS-100 Bench, 16 LLMs each had one attempt at this TIS-100 puzzle, with 30 minutes to find a working program and keep improving it, without seeing the community leaderboard. 15 of 16 models solved it. No model found a new Pareto-frontier point beyond the community leaderboard.

15 / 16models solved it
429best LLM cycles (304 community)
0new frontier points

Records

ScoreCommunity bestBest LLMModel
Cycles304429Opus 5.5 · +41%
Nodes66DeepSeek V4.1 Flash Ties record
Instructions1718GPT-6 Astra · +6%

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
01Opus 5.5Yes429619—
02Sonnet 5.5Yes448620—
03Fable 5.1Yes495620—
04GLM-5.3Yes603622—
05GPT-6 AstraYes762618—
06GPT-6.1 SolYes817619—
07Muse Wonder 1.0Yes910624—
08Kimi K3.1 ProYes1,014621—
09Gemini 4 ArgonYes1,019619—
10Gemini 3.8 FlashYes1,033620—
11GPT-6 LunaYes1,241623—
12Muse Spark 1.3Yes1,486621—
13DeepSeek V4.1 FlashYes2,018620—
14Haiku 5.5Yes2,336641—
15Grok 4.7Yes3,785638—
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.

Opus 5.5 Fewest cycles

429 cycles · 8 nodes · 47 instructionsNEXUS.05.647.1.429-8-47.txt on GitHub

Opus 5.5 program running on NEXUS.05.647.1 in TIS-100
Node 0
MOV UP, ACC
SUB 512
JLZ A
SUB 511
A: ADD 256
ADD ACC
MOV ACC, DOWN
Node 1
MOV UP, ACC
JLZ A
SUB 511
A: ADD 256
ADD ACC
MOV ACC, RIGHT
Node 2
MOV LEFT, ACC
JLZ A
SUB 511
A: ADD 256
ADD ACC
MOV ACC, RIGHT
Node 3
MOV LEFT, ACC
JLZ A
SUB 511
A: ADD 256
ADD ACC
MOV ACC, RIGHT
Node 4
MOV LEFT, ACC
JLZ A
SUB 511
A: ADD 256
ADD ACC
JLZ B
SUB 511
B: ADD 256
ADD ACC
MOV ACC, DOWN
Node 6
MOV RIGHT, DOWN
Node 7
MOV RIGHT, ACC
ADD ACC
MOV ACC, DOWN
ADD ACC
MOV ACC, LEFT
Node 8
MOV UP, ACC
JLZ M
SUB 511
M: ADD 512
MOV ACC, LEFT
MOV ACC, DOWN

Opus 5.5 Fewest nodes

459 cycles · 6 nodes · 44 instructionsNEXUS.05.647.1.459-6-44.txt on GitHub

Opus 5.5 program running on NEXUS.05.647.1 in TIS-100
Node 0
MOV UP, ACC
SUB 512
JLZ A
SUB 511
A: ADD 256
ADD ACC
JLZ B
SUB 511
B: ADD 256
ADD ACC
MOV ACC, DOWN
Node 1
MOV UP, ACC
JLZ A
SUB 511
A: ADD 256
ADD ACC
JLZ B
SUB 511
B: ADD 256
ADD ACC
MOV ACC, RIGHT
Node 2
MOV LEFT, ACC
JLZ A
SUB 511
A: ADD 256
ADD ACC
JLZ B
SUB 511
B: ADD 256
ADD ACC
MOV ACC, DOWN
Node 6
MOV UP, ACC
JLZ M
SUB 511
M: ADD 512
MOV ACC, RIGHT
ADD ACC
ADD ACC
MOV ACC, DOWN
Node 7
MOV LEFT, ACC
MOV ACC, RIGHT
ADD ACC
MOV ACC, DOWN
Node 8
MOV LEFT, DOWN

GPT-6 Astra Fewest instructions

10,727 cycles · 7 nodes · 18 instructionsNEXUS.05.647.1.10727-7-18.txt on GitHub

GPT-6 Astra program running on NEXUS.05.647.1 in TIS-100
Node 0
MOV UP DOWN
Node 1
MOV UP RIGHT
Node 2
MOV LEFT RIGHT
Node 3
MOV 1 ACC
SUB LEFT
L: ADD 8
MOV ACC DOWN
JLZ L
Node 6
MOV RIGHT DOWN
Node 7
ADD 1
JRO UP
MOV ACC RIGHT
ADD ACC
MOV ACC DOWN
ADD ACC
MOV ACC LEFT
MOV 0 ACC
Node 8
MOV LEFT DOWN