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Anthropic: Claude Fable 5 vs xAI: Grok 4.5

Grok 4.5 (high) leads on average score with 8.9 vs 8.6. Grok 4.5 (high) has the lower benchmark cost at $1.707 vs $3.478. Claude Fable 5 (medium) is faster at 17.20s vs 76.50s, with pass rates of 78.8% vs 83.3%.

Recommended modelGrok 4.5 (high)It has the best score here (8.9), while costing about 2.0x less than Claude Fable 5 (medium).

Last updated at: 2026-07-17

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 Grok 4.5 Grok 4.5 high Release: 2026-07-08
Score 8.6 8.9
Rank #17 #12
Reliability 10.0 10.0
Consistency 9.6 9.2
Tests Correct
Attempt pass rate 78.8% 83.3%
Flaky tests 1 2
Total Runs 66 66
Cost per result 20.459 10.041
Total Cost $3.478 $1.707
Input Price $10.000 / 1M $2.000 / 1M
Output Price $50.000 / 1M $6.000 / 1M
Total Input Tokens 89,643 151,562
Output Tokens 41,360 5,655
Reasoning Tokens 10,269 247,540
Response Time (avg) 17.20s 76.50s
Response Time (max) 80.80s 676.83s
Response Time (total) 378.41s 1683.07s

Hamster playing table tennis

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

#17 Claude Fable 5

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

#12 xAI: 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 10.0 10.0 100.0% 0 15.59s 10,590 7,383 1,318
Grok 4.5 10.0 10.0 100.0% 0 155.16s 9,579 357 100,752

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