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Claude Fable 5 (medium) vs Grok 4.5 (low)

Claude Fable 5 (medium) leads on average score with 8.6 vs 8.4. Grok 4.5 (low) has the lower benchmark cost at $0.945 vs $3.004. Claude Fable 5 (medium) is faster at 15.01s vs 16.17s, with pass rates of 78.8% vs 77.3%.

Last updated at: 2026-08-20

Rank
#33
Total Output Tokens
42,146
Response Time (avg)
15.01s
Total Cost
$3.004
Rank
#40
Total Output Tokens
115,489
Response Time (avg)
16.17s
Total Cost
$0.945
Recommended model Grok 4.5 (low)

Its score stays close to the best score here (8.4 vs 8.6), while costing about 3.2x less than Claude Fable 5 (medium).

Detailed comparison

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 Grok 4.5 Grok 4.5 low Release: 2026-07-08
Score 8.6 8.4
Rank #33 #40
Reliability 10.0 10.0
Consistency 9.6 9.3
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 78.8% 77.3%
Flaky tests 1 2
Total Runs 66 66
Cost per result 17.669 5.901
Total Cost $3.004 $0.945
Input Price $10.000 / 1M $2.000 / 1M
Output Price $50.000 / 1M $6.000 / 1M
Total Input Tokens 89,640 125,605
Output Tokens 33,092 7,505
Reasoning Tokens 9,054 107,984
Response Time (avg) 15.01s 16.17s
Response Time (max) 80.80s 205.28s
Response Time (total) 330.15s 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.

#33 Claude Fable 5

medium
Cost
$0.606
Time
156.7s
Tokens
12,264 tok

#40 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 10.0 10.0 100.0% 0 15.59s 10,590 7,383 1,318
Grok 4.5 10.0 10.0 100.0% 0 13.72s 9,579 303 15,641

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