TIS-100 Bench: Intersection Identifier

SPEC64160260 Hard Sequence algorithms Memory & interpreters Community tournament puzzle · TIS-100 Bench report →

Find values present in all three zero-terminated sequences, preserving their order in each sequence's output.

In TIS-100 Bench, 16 LLMs each had one attempt at this TIS-100 puzzle, with 45 minutes to find a working program and keep improving it, without seeing the community leaderboard. 9 of 16 models solved it. Together they found 6 new Pareto-frontier points beyond the community leaderboard.

9 / 16models solved it
3,460best LLM cycles (3,872 community)
6new frontier points

Records

ScoreCommunity bestBest LLMModel
Cycles3,8723,460GPT-6.1 Sol ★ New record
Nodes55GPT-6 Astra Ties record
Instructions2745Sonnet 5.5 · +67%

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 5.5Yes3,6825486
02Kimi K3.1 ProYes3,5236554
03Sonnet 5.5Yes3,6305453
04GPT-6.1 SolYes3,4605542
05Fable 5.1Yes3,5386552
06Gemini 3.8 FlashYes4,190759—
07GPT-6 AstraYes4,537565—
08Gemini 4 ArgonYes4,767665—
09Haiku 5.5Yes6,165766—
10DeepSeek V4.1 FlashNo————
11GLM-5.3No————
12Grok 4.7No————
13MiMo-V2.6-ProNo————
14Muse Spark 1.3No————
15Muse Wonder 1.0No————
16GPT-6 LunaNo————

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★ New frontier point

3,460 cycles · 6 nodes · 74 instructionsSPEC64160260.3460-6-74.txt on GitHub

GPT-6.1 Sol program running on SPEC64160260 in TIS-100
Node 1
D: MOV RIGHT ACC
MOV ACC DOWN
JNZ D
Q: MOV RIGHT ACC
ADD 200
L: SAV
SUB DOWN
JLZ D
SUB 200
MOV ACC DOWN
SWP
JMP L
Node 2
A: MOV RIGHT ACC
MOV ACC LEFT
JNZ A
Q: MOV RIGHT LEFT
MOV RIGHT DOWN
R: MOV DOWN ACC
MOV ACC LEFT
JNZ R
JMP Q
Node 3
A: MOV UP ACC
MOV ACC LEFT
JNZ A
MOV UP ACC
B: MOV ACC LEFT
MOV UP ACC
JEZ C
MOV 8 LEFT
JMP B
C: MOV 1 LEFT
D: MOV UP ACC
NEG
MOV ACC LEFT
MOV 8 LEFT
JMP D
Node 4
MOV 0 LEFT
D: MOV UP ACC
MOV ACC LEFT
JNZ D
MOV LEFT NIL
L: MOV LEFT ACC
JEZ E
MOV ACC UP
MOV ACC DOWN
MOV UP DOWN
JMP L
E: MOV 999 UP
MOV 0 RIGHT
Node 5
S: MOV 0 DOWN
MOV LEFT NIL
JRO UP
P: MOV DOWN ACC
JEZ E
JGZ P
MOV ACC UP
JMP P
E: MOV 0 UP
JMP S
R: MOV DOWN ACC
MOV ACC UP
JNZ R
Node 7
L: MOV UP ACC
SAV
MOV UP ACC
JNZ N
SWP
NEG
JLZ P
MOV ACC DOWN
JMP L
N: SWP
P: MOV ACC RIGHT
JMP L

Sonnet 5.5 Fewest nodes★ New frontier point

3,676 cycles · 5 nodes · 46 instructionsSPEC64160260.3676-5-46.txt on GitHub

Sonnet 5.5 program running on SPEC64160260 in TIS-100
Node 2
A: MOV RIGHT, ACC
MOV ACC, DOWN
JNZ A
B: MOV RIGHT, ACC
JEZ C
NEG
MOV ACC, DOWN
JMP B
C: MOV RIGHT, DOWN
JMP C
Node 3
MOV UP, LEFT
Node 4
MOV ACC, LEFT
RS: MOV RIGHT, ACC
MOV ACC, LEFT
JNZ RS
Q: MOV RIGHT, ACC
SAV
MOV LEFT, NIL
R: MOV LEFT, ACC
MOV ACC, DOWN
SWP
MOV ACC, DOWN
SWP
JNZ R
MOV ACC, RIGHT
Node 5
R5: MOV UP, ACC
MOV ACC, LEFT
JNZ R5
S: MOV ACC, DOWN
MOV UP, LEFT
MOV LEFT, NIL
MOV DOWN, NIL
P: MOV DOWN, ACC
MOV ACC, LEFT
JNZ P
JMP S
Node 7
F: MOV UP, ACC
MOV ACC, RIGHT
ADD UP
JNZ F
MOV RIGHT, ACC
NEG
JGZ O
MOV ACC, RIGHT
JMP F
O: MOV ACC, DOWN

Sonnet 5.5 Fewest instructions

3,934 cycles · 5 nodes · 45 instructionsSPEC64160260.3934-5-45.txt on GitHub

Sonnet 5.5 program running on SPEC64160260 in TIS-100
Node 2
A: MOV RIGHT, ACC
MOV ACC, DOWN
JNZ A
B: MOV RIGHT, ACC
JEZ C
NEG
MOV ACC, DOWN
JMP B
C: MOV RIGHT, DOWN
JMP C
Node 3
MOV UP, LEFT
Node 4
MOV ACC, LEFT
RS: MOV RIGHT, ACC
MOV ACC, LEFT
JNZ RS
Q: MOV RIGHT, ACC
SAV
MOV LEFT, NIL
R: MOV LEFT, ACC
MOV ACC, DOWN
SWP
MOV ACC, DOWN
SWP
JNZ R
MOV ACC, RIGHT
Node 5
R5: MOV UP, ACC
MOV ACC, LEFT
JNZ R5
S: MOV ACC, DOWN
MOV UP, LEFT
MOV LEFT, NIL
MOV DOWN, NIL
P: MOV DOWN, ACC
MOV ACC, LEFT
JNZ P
JMP S
Node 7
F: MOV UP, ACC
MOV ACC, RIGHT
ADD UP
JNZ F
MOV RIGHT, ACC
NEG
MOV ACC, RIGHT
JLZ F
MOV ACC, DOWN