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Claude Fable 5 (medium) vs Pareto 26.9 (default)

The average score is effectively tied at 8.9 vs 8.9. Pareto 26.9 (default) has the lower benchmark cost at $1.864 vs $5.089. Claude Fable 5 (medium) is faster at 16.84s vs 28.26s, with pass rates of 79.7% vs 79.7%.

Last updated at: 2026-10-15

Compared models

Rank
#54
Total Output Tokens
47,285
Response Time (avg)
16.84s
Total Cost
$5.089
Rank
#55
Total Output Tokens
175,696
Response Time (avg)
28.26s
Total Cost
$1.864
Recommended model Pareto 26.9 (default)

It has the best score here (8.9), while costing about 2.7x less than Claude Fable 5 (medium).

Detailed comparison

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 Pareto 26.9 Pareto 26.9 default Release: 2026-10-15
Score 8.9 8.9
Rank #54 #55
Reliability 10.0 10.0
Consistency 9.6 8.1
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 79.7% 79.7%
Flaky tests 1 6
Total Runs 69 69
Cost per result 28.269 12.422
Total Cost $5.089 $1.864
Input Price $10.000 / 1M $2.500 / 1M
Output Price $50.000 / 1M $7.500 / 1M
Cache Read Price $1.000 / 1M $0.250 / 1M
Cache Write Price $12.500 / 1M N/A
Total Input Tokens 272,411 218,199
Output Tokens 35,497 175,696
Reasoning Tokens 11,788 0
Response Time (avg) 16.84s 28.26s
Response Time (max) 80.80s 151.76s
Response Time (total) 387.26s 649.90s
Parameters ~9.5T total (~878B active) -
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#54 Claude Fable 5

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

#55 Pareto 26.9

default
Cost
$0.038
Time
109.6s
Tokens
5,118 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
Pareto 26.9 10.0 10.0 100.0% 0 49.15s 7,419 1,895 0

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