Gemma 4 31B vs Grok 4.5
Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
Grok 4.5 leads for most workloads.
Based on BenchLM composite scores, July 2026.
Gemma 4 31B
62
Grok 4.5
75
Pick Grok 4.5 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
| Benchmark | Gemma 4 31B | Δ | Grok 4.5 |
|---|---|---|---|
| Coding | 41.6 | → 23.1 | 64.7 |
| Agentic | — | — | 83.3 |
| Knowledge | 53.3 | — | — |
| Multimodal | 76.9 | — | — |
Operational Comparison
Gemma 4 31B
Grok 4.5
$0 / $0
$2 / $6
N/A
N/A
N/A
N/A
256K
500K
Quick Verdict
Pick Grok 4.5 if you want the stronger benchmark profile. Gemma 4 31B only becomes the better choice if you want the cheaper token bill.
Grok 4.5 is clearly ahead on the provisional aggregate, 75 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4.5's sharpest advantage is in coding, where it averages 64.7 against 41.6.
Grok 4.5 is also the more expensive model on tokens at $2.00 input / $6.00 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. Grok 4.5 gives you the larger context window at 500K, compared with 256K for Gemma 4 31B.
Benchmark Deep Dive
Frequently Asked Questions (2)
Which is better, Gemma 4 31B or Grok 4.5?
Grok 4.5 is ahead on BenchLM's provisional leaderboard, 75 to 62.
Which is better for coding, Gemma 4 31B or Grok 4.5?
Grok 4.5 has the edge for coding in this comparison, averaging 64.7 versus 41.6. Gemma 4 31B stays close enough that the answer can still flip depending on your workload.
Self-host vs API cost
Estimates at 50,000 req/day · 1000 tokens/req average.
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