Grok 4.5 vs o3-mini
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
o3-mini
54
Pick Grok 4.5 if you want the stronger benchmark profile. o3-mini only becomes the better choice if you want the cheaper token bill.
Category Radar
Head-to-Head by Category
Category Breakdown
| Benchmark | Grok 4.5 | Δ | o3-mini |
|---|---|---|---|
| Coding | 64.7 | ← 15.4 | 49.3 |
| Agentic | 83.3 | — | — |
| Knowledge | — | — | 77.2 |
| Inst. Following | — | — | 93.9 |
Operational Comparison
Grok 4.5
o3-mini
$2 / $6
$1.1 / $4.4
N/A
160 t/s
N/A
7.12s
500K
200K
Quick Verdict
Pick Grok 4.5 if you want the stronger benchmark profile. o3-mini only becomes the better choice if you want the cheaper token bill.
Grok 4.5 is clearly ahead on the provisional aggregate, 75 to 54. 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 49.3.
Grok 4.5 is also the more expensive model on tokens at $2.00 input / $6.00 output per 1M tokens, versus $1.10 input / $4.40 output per 1M tokens for o3-mini. Grok 4.5 gives you the larger context window at 500K, compared with 200K for o3-mini.
Benchmark Deep Dive
Frequently Asked Questions (2)
Which is better, Grok 4.5 or o3-mini?
Grok 4.5 is ahead on BenchLM's provisional leaderboard, 75 to 54.
Which is better for coding, Grok 4.5 or o3-mini?
Grok 4.5 has the edge for coding in this comparison, averaging 64.7 versus 49.3. o3-mini stays close enough that the answer can still flip depending on your workload.
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