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#66

Grok 4.20

X AI Release: 2026-03-31 Tested on: 2026-05-08 15:32 x-ai/grok-4.20::medium
(medium) (none)

Summary

Grok 4.20 scores 6.9 on AI BENCHY and ranks #66. It has 10.0 reliability, a 63.2% pass rate, $0.756 total cost, and 14.53s average response time.

Identity note

Grok 4.20 Beta was the preview version of Grok 4.20.

Score

6.9

Consistency

8.3

Total Output Tokens

130,017

Total Input Tokens

0

Input Price

$1.250 / 1M

Output Price

$2.500 / 1M

Tests Correct

Wrong Tests: 9

Attempt pass rate: 63.2%

Flaky tests

4

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

14.53s

Response Time (max): 63.48s

Response Time (total): 276.06s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#66 xAI: Grok 4.20

medium
Cost
$0.041
Time
110.3s
Tokens
16,336 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-06-04 14:17 New test added 7.1 10.0 $0.609 Compare
2026-05-22 00:32 Suite changed 6.7 10.0 $0.832 Compare
2026-05-08 15:32 Suite changed 6.9 10.0 $0.756 Current run
2026-04-11 01:44 First recorded run 7.0 N/A $0.743 Compare

This run used a different benchmark suite. Keep suite changes in mind when reading historical movement.

Run comparison

RunScoreConsistencyReliabilityTests CorrectFlaky testsTotal Output TokensTotal Input TokensTotal CostResponse Time (avg)
2026-05-08 15:32 · Suite changed6.98.310.010/194130,0170$0.75614.53s
2026-04-11 01:44 · First recorded run7.07.8N/A9/185111,6260$0.74310.33s
Difference-0.1+0.5+1-1+183910+$0.014+4203ms

These two runs used different benchmark suites, so the deltas reflect both model changes and suite changes.

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

Category Breakdown

Category Score Consistency Tests Correct
Anti-AI Tricks 8.2 7.9
Coding 4.3 1.1
Combined 10.0 10.0
Data parsing and extraction 10.0 10.0
Domain specific 5.3 10.0
General Intelligence 3.9 2.6
Instructions following 7.3 6.0
Puzzle Solving 7.7 10.0
Tool Calling 3.0 10.0
Trivia 3.0 10.0

Compared models