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#245

Grok 4.3

X AI Release: 2026-05-01 Tested on: 2026-10-01 02:35 x-ai/grok-4.3::medium
~1.5T total (~150B active)MoEClosedEstimated

Summary

Grok 4.3 scores 6.5 on AI BENCHY and ranks #245. It has 10.0 reliability, a 63.8% pass rate, $0.989 total cost, and 44.53s average response time.

What makes Grok 4.3 unique: It stands out most in General Intelligence, where it ranks #4, while Puzzle Solving is its weakest area at #12.

Model facts

Researched on 2026-08-12

Estimated
Parameters
~1.5T total (~150B 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

6.5

Consistency

8.3

Reliability

10.0

Total Cost (Current Price)

$0.989

Total Output Tokens

232,542

Total Input Tokens

325,471

Input Price

$1.250 / 1M

Output Price

$2.500 / 1M

Cache Read Price

$0.200 / 1M

Cache Write Price

N/A

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Tests Correct

Wrong Tests: 11

Attempt pass rate: 63.8%

Flaky tests

5

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

Response Time (avg)

44.53s

Response Time (max): 216.69s

Response Time (total): 1024.25s

Wrong answer: 6 Did not follow instructions: 2 Extra formatting: 1 Invalid tool call: 1 No answer: 1

Hamster playing table tennis

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

#245 SpaceXAI: Grok 4.3

medium
Cost
$0.009
Time
19.0s
Tokens
3,661 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-10-01 02:35 Re-test 6.5 10.0 $0.989 Current run
2026-07-16 23:07 New test added 7.1 10.0 $0.779 Compare
2026-06-04 14:11 New test added 7.6 10.0 $0.614 Compare
2026-05-22 00:32 Re-test 7.8 10.0 $0.593 Compare
2026-05-01 00:40 Initial run 8.2 10.0 $0.517 Compare

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

Price History

Historical pricing data for this model from OpenRouter.

Date Input Price Output Price Cache Read Price Cache Write Price
2026-08-14 12:51 $1.250 / 1M $2.500 / 1M N/A N/A
2026-10-01 18:33 $1.250 / 1M $2.500 / 1M $0.200 / 1M N/A

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

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Category Breakdown

Category Score Consistency Tests Correct
Agentic 3.9 9.6
Anti-AI Tricks 10.0 10.0
Coding 5.9 7.7
Combined 6.5 10.0
Data parsing and extraction 10.0 10.0
Domain specific 3.5 4.4
General Intelligence 5.4 2.5
Instructions following 9.8 10.0
Puzzle Solving 5.9 7.2
Tool Calling 10.0 10.0
Trivia 3.0 10.0

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