o3-mini vs Ministral 3 8B

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

o3-mini is clearly ahead on the aggregate, 71 to 32. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

o3-mini's sharpest advantage is in reasoning, where it averages 81.1 against 36.1. The single biggest benchmark swing on the page is MMLU, 86.9 to 28.

o3-mini is also the more expensive model on tokens at $1.10 input / $4.40 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Ministral 3 8B. That is roughly Infinityx on output cost alone. o3-mini is the reasoning model in the pair, while Ministral 3 8B is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. o3-mini gives you the larger context window at 200K, compared with 128K for Ministral 3 8B.

Quick Verdict

Pick o3-mini if you want the stronger benchmark profile. Ministral 3 8B only becomes the better choice if you want the cheaper token bill or you would rather avoid the extra latency and token burn of a reasoning model.

Agentic

o3-mini

o3-mini

66.6

Ministral 3 8B

28.9

67
Terminal-Bench 2.0
26
74
BrowseComp
36
61
OSWorld-Verified
27

Coding

o3-mini

o3-mini

55.6

Ministral 3 8B

14.2

49.3
SWE-bench Verified
16
57
SWE-bench Pro
13
Coming soon
HumanEval
23
Coming soon
LiveCodeBench
15

Multimodal & Grounded

o3-mini

o3-mini

74.4

Ministral 3 8B

32.4

73
MMMU-Pro
27
76
OfficeQA Pro
39

Reasoning

o3-mini

o3-mini

81.1

Ministral 3 8B

36.1

82
LongBench v2
38
80
MRCRv2
41
Coming soon
SimpleQA
28
Coming soon
MuSR
26
Coming soon
BBH
63

Knowledge

o3-mini

o3-mini

70.8

Ministral 3 8B

28

86.9
MMLU
28
77.2
GPQA
27
66
FrontierScience
32
Coming soon
SuperGPQA
25
Coming soon
OpenBookQA
23
Coming soon
MMLU-Pro
52
Coming soon
HLE
3

Instruction Following

o3-mini

o3-mini

93.9

Ministral 3 8B

69

93.9
IFEval
69

Multilingual

o3-mini

o3-mini

73

Ministral 3 8B

61.7

73
MMLU-ProX
61
Coming soon
MGSM
63

Mathematics

o3-mini

o3-mini

87.3

Ministral 3 8B

43.3

87.3
AIME 2024
32
Coming soon
AIME 2023
30
Coming soon
AIME 2025
33
Coming soon
HMMT Feb 2023
26
Coming soon
HMMT Feb 2024
28
Coming soon
HMMT Feb 2025
27
Coming soon
BRUMO 2025
29
Coming soon
MATH-500
60

Frequently Asked Questions

Which is better, o3-mini or Ministral 3 8B?

o3-mini is ahead overall, 71 to 32. The biggest single separator in this matchup is MMLU, where the scores are 86.9 and 28.

Which is better for knowledge tasks, o3-mini or Ministral 3 8B?

o3-mini has the edge for knowledge tasks in this comparison, averaging 70.8 versus 28. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, o3-mini or Ministral 3 8B?

o3-mini has the edge for coding in this comparison, averaging 55.6 versus 14.2. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.

Which is better for math, o3-mini or Ministral 3 8B?

o3-mini has the edge for math in this comparison, averaging 87.3 versus 43.3. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.

Which is better for reasoning, o3-mini or Ministral 3 8B?

o3-mini has the edge for reasoning in this comparison, averaging 81.1 versus 36.1. Inside this category, LongBench v2 is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, o3-mini or Ministral 3 8B?

o3-mini has the edge for agentic tasks in this comparison, averaging 66.6 versus 28.9. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, o3-mini or Ministral 3 8B?

o3-mini has the edge for multimodal and grounded tasks in this comparison, averaging 74.4 versus 32.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, o3-mini or Ministral 3 8B?

o3-mini has the edge for instruction following in this comparison, averaging 93.9 versus 69. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, o3-mini or Ministral 3 8B?

o3-mini has the edge for multilingual tasks in this comparison, averaging 73 versus 61.7. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.

Last updated: March 12, 2026

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