Gemini 2.5 Flash vs Z-1

Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.

Quick Verdict

Z-1 wins overall with a score of 43 vs 41 (2 point difference).Z-1 wins 4 out of 4 categories.

Knowledge

Z-1

Gemini 2.5 Flash

47.8

Z-1

49.8

50
MMLU
52
49
GPQA
51
47
SuperGPQA
49
45
OpenBookQA
47

Coding

Z-1

Gemini 2.5 Flash

42

Z-1

44

42
HumanEval
44

Mathematics

Z-1

Gemini 2.5 Flash

49

Z-1

51

50
AIME 2023
52
52
AIME 2024
54
51
AIME 2025
53
46
HMMT Feb 2023
48
48
HMMT Feb 2024
50
47
HMMT Feb 2025
49
49
BRUMO 2025
51

Reasoning

Z-1

Gemini 2.5 Flash

47

Z-1

49

48
SimpleQA
50
46
MuSR
48

Frequently Asked Questions

Which is better, Gemini 2.5 Flash or Z-1?

Z-1 scores higher overall with 43 vs 41, a difference of 2 points across all benchmarks.

Which is better for knowledge tasks, Gemini 2.5 Flash or Z-1?

Z-1 leads in knowledge tasks with an average score of 49.8 vs 47.8.

Which is better for coding, Gemini 2.5 Flash or Z-1?

Z-1 leads in coding with an average score of 44 vs 42.

Which is better for math, Gemini 2.5 Flash or Z-1?

Z-1 leads in math with an average score of 51 vs 49.

Which is better for reasoning, Gemini 2.5 Flash or Z-1?

Z-1 leads in reasoning with an average score of 49 vs 47.