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#269

Grok 4.20

X AI Release: 2026-03-31 Tested on: 2026-05-06 14:16 x-ai/grok-4.20::none
~1T total (~100B active)MoEClosedEstimated
(medium) (none)

Summary

Grok 4.20 scores 4.1 on AI BENCHY and ranks #269. It has N/A reliability, a 27.3% pass rate, $0.057 total cost, and 1.11s average response time.

What makes Grok 4.20 unique: It stands out most in Data parsing and extraction, where it ranks #1, while Coding is its weakest area at #8. It is notably fast compared with similar models.

Identity note

Grok 4.20 Beta was the preview version of Grok 4.20.

Model facts

Researched on 2026-08-12

Estimated
Parameters
~1T total (~100B active)
Architecture
MoE
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. xAI does not disclose the architecture or count.

Parameter source Availability source

Score

4.1

Consistency

8.1

Reliability

N/A

Total Cost (Current Price)

$0.057 ↓ -40.1%

Tested at: $0.095

Total Output Tokens

1,923

Total Input Tokens

41,313

Input Price

$1.250 / 1M

Output Price

$2.500 / 1M

Tests Correct

Wrong Tests: 12

Attempt pass rate: 27.3%

Benchmark coverage: 54/66 attempts

Flaky tests

0

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

Response Time (avg)

1.11s

Response Time (max): 6.04s

Response Time (total): 19.96s

Wrong answer: 10 Extra formatting: 1 Invalid tool call: 1

Hamster playing table tennis

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

#269 xAI: Grok 4.20

none
Cost
$0.004
Time
6.5s
Tokens
1,367 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-05-06 14:16 Re-test 4.1 N/A $0.057 ↓ Current run
2026-05-06 14:16 Re-test 4.1 N/A $0.057 ↓ Compare
2026-05-06 14:16 Re-test 5.4 N/A $0.057 ↓ Compare
2026-05-06 14:16 Re-test 5.4 N/A $0.095 Compare
2026-05-06 14:16 Re-test 5.4 N/A $0.095 Compare
2026-05-06 14:16 Suite changed 5.4 N/A $0.095 Compare
2026-04-11 01:44 First recorded run 5.2 N/A $0.095 Compare

Run comparison

RunBenchmark coverageScoreConsistencyReliabilityTests CorrectFlaky testsTotal Output TokensTotal Input TokensTotal CostResponse Time (avg)
2026-05-06 14:16 · Current run54/66 attempts4.18.1N/A6/1801,92341,313$0.0571.11s
2026-05-06 14:16 · Re-test54/54 attempts4.18.1N/A6/1801,92341,313$0.0571.11s
Difference—0.00.00000$0.0000ms

Price History

Historical pricing data for this model from OpenRouter.

Date Input Price Output Price
2026-06-04 15:40 $1.250 / 1M $2.500 / 1M

Charts

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Total Output Tokens

Score vs Total Output Tokens

Quick Compare

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Category Breakdown

Category Score Consistency Tests Correct
Anti-AI Tricks 4.8 10.0
Coding 1.1 3.1
Combined 1.5 5.0
Data parsing and extraction 10.0 10.0
Domain specific 3.0 10.0
General Intelligence 4.8 10.0
Instructions following 6.3 10.0
Puzzle Solving 5.3 10.0
Tool Calling 10.0 10.0
Trivia 0.0 0.0

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