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Claude Fable 5.1 (medium) vs Grok 4.5 (low)

Grok 4.5 (low) leads on average score with 8.4 vs 8.3. Grok 4.5 (low) has the lower benchmark cost at $0.945 vs $2.909. Claude Fable 5.1 (medium) is faster at 11.67s vs 16.17s, with pass rates of 81.8% vs 77.3%.

Last updated at: 2026-09-02

Rank
#48
Total Output Tokens
31,152
Response Time (avg)
11.67s
Total Cost
$2.909
Rank
#42
Total Output Tokens
115,489
Response Time (avg)
16.17s
Total Cost
$0.945
Recommended model Grok 4.5 (low)

It has the best score here (8.4), while costing about 3.1x less than Claude Fable 5.1 (medium).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 medium Release: 2026-09-02 Grok 4.5 Grok 4.5 low Release: 2026-07-08
Score 8.3 8.4
Rank #48 #42
Reliability 10.0 10.0
Consistency 7.8 9.3
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 81.8% 77.3%
Flaky tests 6 2
Total Runs 66 66
Cost per result 19.392 5.901
Total Cost $2.909 $0.945
Input Price $10.000 / 1M $2.000 / 1M
Output Price $50.000 / 1M $6.000 / 1M
Total Input Tokens 135,112 125,605
Output Tokens 7,594 7,505
Reasoning Tokens 23,558 107,984
Response Time (avg) 11.67s 16.17s
Response Time (max) 36.59s 205.28s
Response Time (total) 256.73s 355.67s
Parameters ~9.5T total (~878B active) ~1.7T total (~170B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#48 Claude Fable 5.1

medium
Cost
$0.244
Time
65.9s
Tokens
5,025 tok

#42 SpaceXAI: Grok 4.5

low
Cost
$0.011
Time
12.4s
Tokens
2,018 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 7.0 5.0 77.8% 2 10.99s 10,608 525 4,376
Grok 4.5 10.0 10.0 100.0% 0 13.72s 9,579 303 15,641

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