Gemini 2.5 Flash vs Grok 3 Mini

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

Gemini 2.5 Flash has the cleaner overall profile here, landing at 25 versus 23. It is a real lead, but still close enough that category-level strengths matter more than the headline number.

Gemini 2.5 Flash's sharpest advantage is in reasoning, where it averages 46.9 against 21.7. The single biggest benchmark swing on the page is SimpleQA, 48% to 21.7%. Grok 3 Mini does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.

Gemini 2.5 Flash is also the more expensive model on tokens at $0.15 input / $0.60 output per 1M tokens, versus $0.30 input / $0.50 output per 1M tokens for Grok 3 Mini. Gemini 2.5 Flash gives you the larger context window at 1M, compared with 128K for Grok 3 Mini.

Quick Verdict

Pick Gemini 2.5 Flash if you want the stronger benchmark profile. Grok 3 Mini only becomes the better choice if knowledge is the priority or you want the cheaper token bill.

Agentic

Coming soon

Benchmark data for this category is coming soon.

Coding

Gemini 2.5 Flash

Gemini 2.5 Flash

42

Grok 3 Mini

41.5

42%
HumanEval
Coming soon
Coming soon
LiveCodeBench
41.5%

Multimodal & Grounded

Coming soon

Benchmark data for this category is coming soon.

Reasoning

Gemini 2.5 Flash

Gemini 2.5 Flash

46.9

Grok 3 Mini

21.7

48%
SimpleQA
21.7%
46%
MuSR
Coming soon

Knowledge

Grok 3 Mini

Gemini 2.5 Flash

48

Grok 3 Mini

74.1

50%
MMLU
Coming soon
49%
GPQA
66.2%
47%
SuperGPQA
Coming soon
45%
OpenBookQA
Coming soon
Coming soon
MMLU-Pro
78.9%

Instruction Following

Coming soon

Benchmark data for this category is coming soon.

Multilingual

Coming soon

Benchmark data for this category is coming soon.

Mathematics

Gemini 2.5 Flash

Gemini 2.5 Flash

49

Grok 3 Mini

39.7

50%
AIME 2023
Coming soon
52%
AIME 2024
39.7%
51%
AIME 2025
Coming soon
46%
HMMT Feb 2023
Coming soon
48%
HMMT Feb 2024
Coming soon
47%
HMMT Feb 2025
Coming soon
49%
BRUMO 2025
Coming soon

Frequently Asked Questions

Which is better, Gemini 2.5 Flash or Grok 3 Mini?

Gemini 2.5 Flash is ahead overall, 25 to 23. The biggest single separator in this matchup is SimpleQA, where the scores are 48% and 21.7%.

Which is better for knowledge tasks, Gemini 2.5 Flash or Grok 3 Mini?

Grok 3 Mini has the edge for knowledge tasks in this comparison, averaging 74.1 versus 48. Inside this category, GPQA is the benchmark that creates the most daylight between them.

Which is better for coding, Gemini 2.5 Flash or Grok 3 Mini?

Gemini 2.5 Flash has the edge for coding in this comparison, averaging 42 versus 41.5. Grok 3 Mini stays close enough that the answer can still flip depending on your workload.

Which is better for math, Gemini 2.5 Flash or Grok 3 Mini?

Gemini 2.5 Flash has the edge for math in this comparison, averaging 49 versus 39.7. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.

Which is better for reasoning, Gemini 2.5 Flash or Grok 3 Mini?

Gemini 2.5 Flash has the edge for reasoning in this comparison, averaging 46.9 versus 21.7. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Last updated: March 17, 2026

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