TIS-100 Bench: Sequence Range Limiter

NEXUS.02.981.2 Medium Sequence algorithms Streaming state Built-in puzzle · TIS-100 Bench report →

Read lower and upper bounds, then clamp every element of a zero-terminated sequence to that range.

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. 14 of 16 models solved it. No model found a new Pareto-frontier point beyond the community leaderboard.

14 / 16models solved it
283best LLM cycles (149 community)
0new frontier points

Records

ScoreCommunity bestBest LLMModel
Cycles149283Haiku 5.5 · +90%
Nodes55DeepSeek V4.1 Flash Ties record
Instructions2328Kimi K3.1 Pro · +22%

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
01Haiku 5.5Yes283534—
02Opus 5.5Yes284530—
03Fable 5.1Yes303532—
04GPT-6.1 SolYes311531—
05Muse Wonder 1.0Yes313534—
06Gemini 4 ArgonYes350529—
07Kimi K3.1 ProYes358528—
08DeepSeek V4.1 FlashYes366540—
09Gemini 3.8 FlashYes367542—
10GPT-6 AstraYes375534—
11Grok 4.7Yes390745—
12Sonnet 5.5Yes393537—
13Muse Spark 1.3Yes407647—
14GPT-6 LunaYes500649—
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.

Haiku 5.5 Fewest cycles

283 cycles · 6 nodes · 43 instructionsNEXUS.02.981.2.283-6-43.txt on GitHub

Haiku 5.5 program running on NEXUS.02.981.2 in TIS-100
Node 0
S: MOV UP, ACC
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
Node 1
A: MOV UP, ACC
JEZ Z
SUB LEFT
JGZ KEEP
MOV LEFT, ACC
JMP OUT
Z: MOV LEFT, NIL
MOV LEFT, NIL
MOV 0, ACC
JMP OUT
KEEP: ADD LEFT
OUT: MOV ACC, DOWN
Node 2
S: MOV UP, ACC
MOV ACC, DOWN
MOV ACC, DOWN
MOV ACC, DOWN
MOV ACC, DOWN
MOV ACC, DOWN
MOV ACC, DOWN
Node 4
A: MOV UP, ACC
SUB RIGHT
JLZ N
MOV RIGHT, DOWN
JMP A
N: ADD RIGHT
MOV ACC, DOWN
Node 5
MOV UP, ACC
MOV ACC, LEFT
MOV ACC, LEFT
Node 8
MOV UP, DOWN

Haiku 5.5 Fewest nodes

375 cycles · 5 nodes · 42 instructionsNEXUS.02.981.2.375-5-42.txt on GitHub

Haiku 5.5 program running on NEXUS.02.981.2 in TIS-100
Node 0
S: MOV UP, ACC
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
MOV ACC, RIGHT
Node 1
A: MOV UP, ACC
JEZ Z
SUB LEFT
JGZ KEEP
MOV LEFT, ACC
JMP C
Z: SUB LEFT
KEEP: ADD LEFT
C: SUB RIGHT
JLZ N
MOV RIGHT, DOWN
JMP A
N: ADD RIGHT
MOV ACC, DOWN
Node 2
S: MOV UP, ACC
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
MOV ACC, LEFT
Node 4
MOV UP, DOWN
Node 8
MOV UP, DOWN

Kimi K3.1 Pro Fewest instructions

493 cycles · 5 nodes · 28 instructionsNEXUS.02.981.2.493-5-28.txt on GitHub

Kimi K3.1 Pro program running on NEXUS.02.981.2 in TIS-100
Node 0
N: MOV UP,ACC
C: JRO RIGHT
S: MOV ACC,RIGHT
MOV ACC,RIGHT
JMP C
Z: MOV NIL,RIGHT
Node 1
L: MOV UP,ACC
JEZ Z
MOV 1,LEFT
SUB LEFT
JLZ C
ADD LEFT
MOV 1,RIGHT
SUB RIGHT
JGZ C
ADD RIGHT
O: MOV ACC,DOWN
JMP L
Z: MOV 4,LEFT
MOV -1,RIGHT
C: MOV ANY,DOWN
Node 2
N: MOV UP,ACC
C: JRO LEFT
S: MOV ACC,LEFT
MOV ACC,LEFT
JMP C
Node 4
MOV UP,DOWN
Node 8
MOV UP,DOWN