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Claude Fable 5.1 (low) vs Qwen3.5 Plus 2026-04-20

Claude Fable 5.1 (low) leads on average score with 6.2 vs 6.1. Qwen3.5 Plus 2026-04-20 has the lower benchmark cost at $0.226 vs $3.395. Claude Fable 5.1 (low) is faster at 11.40s vs 18.49s, with pass rates of 55.1% vs 44.9%.

Last updated at: 2026-10-01

Compared models

Rank
#230
Total Output Tokens
26,073
Response Time (avg)
11.40s
Total Cost
$3.395
Rank
#234
Total Output Tokens
69,664
Response Time (avg)
18.49s
Total Cost
$0.226
Recommended model Qwen3.5 Plus 2026-04-20

Its score stays close to the best score here (6.1 vs 6.2), while costing about 15.1x less than Claude Fable 5.1 (low).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 low Release: 2026-09-02 Qwen3.5 Plus 2026-04-20 Qwen3.5 Plus 2026-04-20 none Release: 2026-04-20
Score 6.2 6.1
Rank #230 #234
Reliability 10.0 9.8
Consistency 8.9 8.4
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 55.1% 44.9%
Flaky tests 3 5
Total Runs 69 69
Cost per result 30.862 2.816
Total Cost $3.395 $0.226
Input Price $10.000 / 1M $0.300 / 1M
Output Price $50.000 / 1M $1.800 / 1M
Total Input Tokens 209,116 299,984
Output Tokens 10,031 69,664
Reasoning Tokens 16,042 0
Response Time (avg) 11.40s 18.49s
Response Time (max) 34.77s 206.05s
Response Time (total) 262.14s 425.33s
Parameters ~9.5T total (~878B active) ~397B total (~17B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#230 Claude Fable 5.1

low
Cost
$0.126
Time
28.5s
Tokens
2,652 tok

#234 Qwen3.5 Plus 2026-04-20

none
Cost
$0.008
Time
77.0s
Tokens
4,369 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 3.4 10.0 0.0% 0 6.75s 10,608 1,753 0
Qwen3.5 Plus 2026-04-20 3.9 7.8 11.1% 1 1.69s 7,913 480 0

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