Head-to-head comparison across 4benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Grok 4.20
70
Qwen3.5-122B-A10B
63
Verified leaderboard positions: Grok 4.20 unranked · Qwen3.5-122B-A10B #14
Pick Grok 4.20 if you want the stronger benchmark profile. Qwen3.5-122B-A10B only becomes the better choice if coding is the priority or you want the cheaper token bill.
Agentic
+9.0 difference
Coding
+11.0 difference
Reasoning
+6.9 difference
Multimodal
+6.4 difference
Grok 4.20
Qwen3.5-122B-A10B
$2 / $6
$0 / $0
233 t/s
N/A
10.33s
N/A
2M
262K
Pick Grok 4.20 if you want the stronger benchmark profile. Qwen3.5-122B-A10B only becomes the better choice if coding is the priority or you want the cheaper token bill.
Grok 4.20 is clearly ahead on the provisional aggregate, 70 to 63. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4.20 is also the more expensive model on tokens at $2.00 input / $6.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Qwen3.5-122B-A10B. That is roughly Infinityx on output cost alone. Grok 4.20 gives you the larger context window at 2M, compared with 262K for Qwen3.5-122B-A10B.
Grok 4.20 is ahead on BenchLM's provisional leaderboard, 70 to 63. The biggest single separator in this matchup is CharXiv, where the scores are 60.9% and 77.2%.
Qwen3.5-122B-A10B has the edge for coding in this comparison, averaging 72 versus 61. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Qwen3.5-122B-A10B has the edge for reasoning in this comparison, averaging 60.2 versus 53.3. Grok 4.20 stays close enough that the answer can still flip depending on your workload.
Qwen3.5-122B-A10B has the edge for agentic tasks in this comparison, averaging 56.1 versus 47.1. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Qwen3.5-122B-A10B has the edge for multimodal and grounded tasks in this comparison, averaging 77.2 versus 70.8. Inside this category, CharXiv is the benchmark that creates the most daylight between them.
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