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xAI: Grok 4.1 Fast vs xAI: Grok 4.20 Beta

Last updated at: 2026-03-12

Metric Grok 4.1 Fast Grok 4.1 Fast medium Release: 2025-11-19 Grok 4.20 Beta Grok 4.20 Beta medium Release: 2026-03-12
Rank #32 #24
Avg Score 6.2 7.0
Consistency 7.9 9.0
Cost per result 0.563 5.989
Total Cost $0.051 $0.599
Tests Correct
Attempt pass rate 66.7% 70.8%
Flaky tests 4 2
Total Runs 48 48
Output Tokens 1,183 1,481
Reasoning Tokens 83,875 86,628
Response Time (avg) 26.35s 8.89s
Response Time (max) 121.79s 24.21s
Response Time (total) 237.11s 142.18s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 10.0 10.0 100.0% 0 5.65s 102 4,021
Grok 4.20 Beta 7.0 7.2 88.9% 1 3.19s 262 6,289
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 10.0 10.0 100.0% 0 37.64s 261 12,272
Grok 4.20 Beta 10.0 10.0 100.0% 0 20.93s 227 12,212
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 9.9 10.0 100.0% 0 6.63s 180 5,409
Grok 4.20 Beta 9.9 10.0 100.0% 0 4.01s 180 5,281
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 4.0 4.4 66.7% 2 121.79s 11 37,657
Grok 4.20 Beta 4.0 10.0 33.3% 0 21.33s 251 40,255
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 3.0 9.9 0.0% 0 16.25s 127 3,456
Grok 4.20 Beta 10.0 10.0 100.0% 0 5.78s 72 3,440
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 5.5 10.0 50.0% 0 5.30s 55 3,489
Grok 4.20 Beta 9.0 10.0 50.0% 0 4.97s 57 7,107
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 4.0 7.2 44.4% 1 8.08s 187 6,086
Grok 4.20 Beta 7.0 7.2 88.9% 1 3.85s 249 6,660
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.1 Fast 10.0 1.6 33.3% 1 27.71s 260 11,485
Grok 4.20 Beta 10.0 10.0 0.0% 0 12.39s 183 5,384

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