Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.2
83
Grok Code Fast 1
42
Pick GPT-5.2 if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you would rather avoid the extra latency and token burn of a reasoning model.
Coding
+6.1 difference
GPT-5.2
Grok Code Fast 1
$2 / $8
$null / $null
73 t/s
172 t/s
130.34s
2.81s
400K
256K
Pick GPT-5.2 if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you would rather avoid the extra latency and token burn of a reasoning model.
GPT-5.2 is clearly ahead on the provisional aggregate, 83 to 42. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.2 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. GPT-5.2 gives you the larger context window at 400K, compared with 256K for Grok Code Fast 1.
GPT-5.2 is ahead on BenchLM's provisional leaderboard, 83 to 42. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 80% and 70.8%.
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 64.7. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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