Grok 4.5 vs Mistral Medium 3.5 128B
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.
Grok 4.5
75
Mistral Medium 3.5 128B
63
Pick Grok 4.5 if you want the stronger benchmark profile. Mistral Medium 3.5 128B only becomes the better choice if coding is the priority.
Category Breakdown
| Benchmark | Grok 4.5 | Δ | Mistral Medium 3.5 128B |
|---|---|---|---|
| Coding | 64.7 | → 12.9 | 77.6 |
| Agentic | 83.3 | — | — |
Operational Comparison
Grok 4.5
Mistral Medium 3.5 128B
$2 / $6
$1.5 / $7.5
N/A
N/A
N/A
N/A
500K
256K
Quick Verdict
Pick Grok 4.5 if you want the stronger benchmark profile. Mistral Medium 3.5 128B only becomes the better choice if coding is the priority.
Grok 4.5 is clearly ahead on the provisional aggregate, 75 to 63. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Mistral Medium 3.5 128B is also the more expensive model on tokens at $1.50 input / $7.50 output per 1M tokens, versus $2.00 input / $6.00 output per 1M tokens for Grok 4.5. Grok 4.5 gives you the larger context window at 500K, compared with 256K for Mistral Medium 3.5 128B.
Benchmark Deep Dive
Frequently Asked Questions (2)
Which is better, Grok 4.5 or Mistral Medium 3.5 128B?
Grok 4.5 is ahead on BenchLM's provisional leaderboard, 75 to 63.
Which is better for coding, Grok 4.5 or Mistral Medium 3.5 128B?
Mistral Medium 3.5 128B has the edge for coding in this comparison, averaging 77.6 versus 64.7. Grok 4.5 stays close enough that the answer can still flip depending on your workload.
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