Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
DeepSeek V4 Flash Base
31
Grok 4.20
76
Pick Grok 4.20 if you want the stronger benchmark profile. DeepSeek V4 Flash Base only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
Reasoning
+8.6 difference
DeepSeek V4 Flash Base
Grok 4.20
$null / $null
$2 / $6
N/A
233 t/s
N/A
10.33s
1M
2M
Pick Grok 4.20 if you want the stronger benchmark profile. DeepSeek V4 Flash Base only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
Grok 4.20 is clearly ahead on the provisional aggregate, 76 to 31. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4.20's sharpest advantage is in reasoning, where it averages 53.3 against 44.7.
Grok 4.20 is the reasoning model in the pair, while DeepSeek V4 Flash Base 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 4.20 gives you the larger context window at 2M, compared with 1M for DeepSeek V4 Flash Base.
Grok 4.20 is ahead on BenchLM's provisional leaderboard, 76 to 31.
Grok 4.20 has the edge for reasoning in this comparison, averaging 53.3 versus 44.7. DeepSeek V4 Flash Base stays close enough that the answer can still flip depending on your workload.
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