Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Grok Code Fast 1
40
o3-mini
56
Pick o3-mini if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you want the cheaper token bill.
Coding
+21.5 difference
Grok Code Fast 1
o3-mini
$0.2 / $1.5
$1.1 / $4.4
172 t/s
160 t/s
2.81s
7.12s
256K
200K
Pick o3-mini if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you want the cheaper token bill.
o3-mini is clearly ahead on the provisional aggregate, 56 to 40. 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 $0.20 input / $1.50 output per 1M tokens for Grok Code Fast 1. That is roughly 2.9x on output cost alone. o3-mini is the reasoning model in the pair, while Grok Code Fast 1 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Grok Code Fast 1 gives you the larger context window at 256K, compared with 200K for o3-mini.
o3-mini is ahead on BenchLM's provisional leaderboard, 56 to 40. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 70.8% and 49.3%.
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 49.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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