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Gemma 4 31B vs Mistral Medium 3.5 128B

Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.

Gemma 4 31B

64

VS

Mistral Medium 3.5 128B

78

0 categoriesvs1 categories

Pick Mistral Medium 3.5 128B if you want the stronger benchmark profile. Gemma 4 31B only becomes the better choice if you want the cheaper token bill.

Category Radar

Head-to-Head by Category

Category Breakdown

Coding

Mistral Medium 3.5 128B
41.6vs77.6

+36.0 difference

Operational Comparison

Gemma 4 31B

Mistral Medium 3.5 128B

Price (per 1M tokens)

$0 / $0

$1.5 / $7.5

Speed

N/A

N/A

Latency (first answer)

N/A

N/A

Context Window

256K

256K

Quick Verdict

Pick Mistral Medium 3.5 128B if you want the stronger benchmark profile. Gemma 4 31B only becomes the better choice if you want the cheaper token bill.

Mistral Medium 3.5 128B is clearly ahead on the provisional aggregate, 78 to 64. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Mistral Medium 3.5 128B's sharpest advantage is in coding, where it averages 77.6 against 41.6.

Mistral Medium 3.5 128B is also the more expensive model on tokens at $1.50 input / $7.50 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Gemma 4 31B. That is roughly Infinityx on output cost alone.

Benchmark Deep Dive

Frequently Asked Questions (2)

Which is better, Gemma 4 31B or Mistral Medium 3.5 128B?

Mistral Medium 3.5 128B is ahead on BenchLM's provisional leaderboard, 78 to 64.

Which is better for coding, Gemma 4 31B or Mistral Medium 3.5 128B?

Mistral Medium 3.5 128B has the edge for coding in this comparison, averaging 77.6 versus 41.6. Inside this category, AA-SciCode is the benchmark that creates the most daylight between them.

Self-host vs API cost

Estimates at 50,000 req/day · 1000 tokens/req average.

Gemma 4 31B
API / mo$0
Self-host / mo$429
Break-even
Mistral Medium 3.5 128B
API / mo$6,750
Self-host / moN/A
Break-even
Proprietary model — self-hosting not applicable.
Model the full break-even

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Last updated: June 12, 2026

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