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Anthropic: Claude Fable 5 vs OpenAI: GPT-5.5

GPT-5.5 (low) leads on average score with 9.3 vs 8.6. GPT-5.5 (low) has the lower benchmark cost at $1.253 vs $3.478. GPT-5.5 (low) is faster at 10.13s vs 17.20s, with pass rates of 78.8% vs 86.4%.

Recommended modelGPT-5.5 (low)It has the best score here (9.3), while costing about 2.8x less than Claude Fable 5 (medium).

Last updated at: 2026-07-25

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 8.6 9.3
Rank #22 #9
Reliability 10.0 10.0
Consistency 9.6 10.0
Tests Correct
Attempt pass rate 78.8% 86.4%
Flaky tests 1 0
Total Runs 66 66
Cost per result 20.459 6.594
Total Cost $3.478 $1.253
Input Price $10.000 / 1M $5.000 / 1M
Output Price $50.000 / 1M $30.000 / 1M
Total Input Tokens 89,643 80,058
Output Tokens 41,360 5,378
Reasoning Tokens 10,269 23,040
Response Time (avg) 17.20s 10.13s
Response Time (max) 80.80s 56.19s
Response Time (total) 378.41s 222.82s

Hamster playing table tennis

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

#22 Claude Fable 5

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

#9 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 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
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402

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