Problem Analysis #18

GPT-5.5 · Run 1

Correct

3.51s

302 toks

API · no tools. This is the prompt and response recorded for this attempt; a full solution may not have been returned.

Problem Statement

Return a single integer only. The problem has been revised so that no final answer is an irrational number, a parameterized expression, a range, a proof, a drawing, a graph, a locus equation, or a region description.

Let a sequence $(c_n)$ satisfy

c_2=2,\qquad c_3=4,

and for $n\ge4$ ,

c_n=c_{n-1}+c_{n-2}.

Find $c_6$ .

Ground Truth

Recorded model response / solution

Reasoning Process

\boxed{16}

Final Model Output

Comparative Analysis (P18) (Average across runs)

Averages use reported measurements only. Missing usage is not treated as zero.

Avg Time Taken

DeepSeek V4 Pro

5.0

K-EXAONE-236B-A23B

4.1

GPT-5.5

3.3

Gemini 3.5 Flash

3.0

Solar Pro 3

1.9

Claude Opus 4.8

1.6

KT Mi:dm 2.0 Base Instruct

0.7

Avg Token Usage

KT Mi:dm 2.0 Base Instruct

867.0

K-EXAONE-236B-A23B

706.7

Gemini 3.5 Flash

678.0

Solar Pro 3

439.0

DeepSeek V4 Pro

374.0

Claude Opus 4.8

296.0

GPT-5.5

254.3