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Claude Fable 5.1 (low) vs Grok 4.3 (medium)

Grok 4.3 (medium) leads on average score with 7.0 vs 6.9. Grok 4.3 (medium) has the lower benchmark cost at $0.741 vs $2.565. Claude Fable 5.1 (low) is faster at 10.33s vs 44.21s, with pass rates of 56.1% vs 66.7%.

Last updated at: 2026-09-02

Rank
#130
Total Output Tokens
24,375
Response Time (avg)
10.33s
Total Cost
$2.565
Rank
#120
Total Output Tokens
225,904
Response Time (avg)
44.21s
Total Cost
$0.741
Recommended model Grok 4.3 (medium)

It has the best score here (7.0), while costing about 3.5x less than Claude Fable 5.1 (low).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 low Release: 2026-09-02 Grok 4.3 Grok 4.3 medium Release: 2026-05-01
Score 6.9 7.0
Rank #130 #120
Reliability 10.0 10.0
Consistency 9.2 8.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 56.1% 66.7%
Flaky tests 2 5
Total Runs 66 66
Cost per result 23.315 6.168
Total Cost $2.565 $0.741
Input Price $10.000 / 1M $1.250 / 1M
Output Price $50.000 / 1M $2.500 / 1M
Total Input Tokens 134,582 140,244
Output Tokens 8,955 13,739
Reasoning Tokens 15,420 212,165
Response Time (avg) 10.33s 44.21s
Response Time (max) 33.10s 216.69s
Response Time (total) 227.37s 972.64s
Parameters ~9.5T total (~878B active) ~1.5T total (~150B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#130 Claude Fable 5.1

low
Cost
$0.126
Time
28.5s
Tokens
2,652 tok

#120 SpaceXAI: Grok 4.3

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

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Fable 5.1 3.4 10.0 0.0% 0 6.75s 10,608 1,753 0
Grok 4.3 5.9 7.7 44.4% 1 41.23s 8,340 1,028 31,226

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