Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Grok 4.3
79
o3-mini
56
Pick Grok 4.3 if you want the stronger benchmark profile. o3-mini only becomes the better choice if knowledge is the priority.
Coding
+2.0 difference
Knowledge
+23.3 difference
Inst. Following
+12.6 difference
Grok 4.3
o3-mini
$1.25 / $2.5
$1.1 / $4.4
209 t/s
160 t/s
12.36s
7.12s
1M
200K
Pick Grok 4.3 if you want the stronger benchmark profile. o3-mini only becomes the better choice if knowledge is the priority.
Grok 4.3 is clearly ahead on the provisional aggregate, 79 to 56. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
o3-mini is also the more expensive model on tokens at $1.10 input / $4.40 output per 1M tokens, versus $1.25 input / $2.50 output per 1M tokens for Grok 4.3. Grok 4.3 gives you the larger context window at 1M, compared with 200K for o3-mini.
Grok 4.3 is ahead on BenchLM's provisional leaderboard, 79 to 56. The biggest single separator in this matchup is GPQA, where the scores are 90.1% and 77.2%.
o3-mini has the edge for knowledge tasks in this comparison, averaging 77.2 versus 53.9. Inside this category, GPQA is the benchmark that creates the most daylight between them.
o3-mini has the edge for coding in this comparison, averaging 49.3 versus 47.3. Grok 4.3 stays close enough that the answer can still flip depending on your workload.
o3-mini has the edge for instruction following in this comparison, averaging 93.9 versus 81.3. Grok 4.3 stays close enough that the answer can still flip depending on your workload.
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