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Claude Fable 5.1 (high) vs Grok 4.5 (high)

Claude Fable 5.1 (high) leads on average score with 9.0 vs 9.0. Grok 4.5 (high) has the lower benchmark cost at $2.252 vs $3.364. Claude Fable 5.1 (high) is faster at 13.59s vs 72.30s, with pass rates of 89.4% vs 86.4%.

Last updated at: 2026-09-02

Rank
#18
Total Output Tokens
40,071
Response Time (avg)
13.59s
Total Cost
$3.364
Rank
#22
Total Output Tokens
324,462
Response Time (avg)
72.30s
Total Cost
$2.252
Recommended model Claude Fable 5.1 (high)

It has the best score here (9.0), while responding about 5.3x faster than Grok 4.5 (high).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 high Release: 2026-09-02 Grok 4.5 Grok 4.5 high Release: 2026-07-08
Score 9.0 9.0
Rank #18 #22
Reliability 10.0 10.0
Consistency 9.6 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 86.4%
Flaky tests 1 3
Total Runs 66 66
Cost per result 17.701 12.565
Total Cost $3.364 $2.252
Input Price $10.000 / 1M $2.000 / 1M
Output Price $50.000 / 1M $6.000 / 1M
Total Input Tokens 135,958 152,175
Output Tokens 7,930 5,655
Reasoning Tokens 32,141 318,807
Response Time (avg) 13.59s 72.30s
Response Time (max) 40.17s 676.83s
Response Time (total) 298.90s 1590.56s
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.

#18 Claude Fable 5.1

high
Cost
$0.384
Time
102.5s
Tokens
7,824 tok

#22 SpaceXAI: Grok 4.5

high
Cost
$0.015
Time
29.7s
Tokens
2,737 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 8.4 7.4 88.9% 1 13.91s 10,608 520 6,503
Grok 4.5 10.0 10.0 100.0% 0 155.16s 9,579 357 100,752

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