Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.4
93
Grok Code Fast 1
42
Verified leaderboard positions: GPT-5.4 #4 · Grok Code Fast 1 unranked
Pick GPT-5.4 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
+13.1 difference
GPT-5.4
Grok Code Fast 1
$2.5 / $15
$null / $null
74 t/s
172 t/s
151.79s
2.81s
1.05M
256K
Pick GPT-5.4 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-5.4 is clearly ahead on the provisional aggregate, 93 to 42. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4 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-5.4 gives you the larger context window at 1.05M, compared with 256K for Grok Code Fast 1.
GPT-5.4 is ahead on BenchLM's provisional leaderboard, 93 to 42.
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 57.7. GPT-5.4 stays close enough that the answer can still flip depending on your workload.
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