Grok 4.1 Fast vs Grok 4.5
Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
Grok 4.5 leads for most workloads.
- Grok 4.1 Fast is ~10× cheaper on input tokens — the budget pick.
Based on BenchLM composite scores, July 2026.
Grok 4.1 Fast
70
Grok 4.5
75
Benchmark data for Grok 4.1 Fast and Grok 4.5 is coming soon on BenchLM.
Category Radar
Head-to-Head by Category
Operational Comparison
Grok 4.1 Fast
Grok 4.5
$0.2 / $0.5
$2 / $6
138 t/s
N/A
0.54s
N/A
1M
500K
Quick Verdict
Benchmark data for Grok 4.1 Fast and Grok 4.5 is coming soon on BenchLM.
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Grok 4.5 is priced at $2.00 input / $6.00 output per 1M tokens, versus $0.20 input / $0.50 output per 1M tokens for Grok 4.1 Fast. Grok 4.1 Fast has the larger context window at 1M, compared with 500K for Grok 4.5.
Benchmark Deep Dive
Frequently Asked Questions (3)
Can I compare Grok 4.1 Fast and Grok 4.5 on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Grok 4.1 Fast and Grok 4.5 today?
Grok 4.1 Fast: $0.20 input / $0.50 output per 1M tokens Grok 4.5: $2.00 input / $6.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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