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Claude Fable 5.1 (high) vs Claude Sonnet 5.5 (max)

The average score is effectively tied at 9.0 vs 9.0. Claude Fable 5.1 (high) has the lower benchmark cost at $3.364 vs $7.545. Claude Fable 5.1 (high) is faster at 13.59s vs 83.04s, with pass rates of 89.4% vs 81.8%.

Last updated at: 2026-09-29

Compared models

Rank
#36
Total Output Tokens
40,071
Response Time (avg)
13.59s
Total Cost
$3.364
Rank
#39
Total Output Tokens
727,349
Response Time (avg)
83.04s
Total Cost
$7.545
Recommended model Claude Fable 5.1 (high)

It has the best score here (9.0), while costing about 2.2x less than Claude Sonnet 5.5 (max).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 high Release: 2026-09-02 Claude Sonnet 5.5 Claude Sonnet 5.5 max Release: 2026-09-29
Score 9.0 9.0
Rank #36 #39
Reliability 10.0 10.0
Consistency 9.6 9.4
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 81.8%
Flaky tests 1 2
Total Runs 66 66
Cost per result 17.701 44.380
Total Cost $3.364 $7.545
Input Price $10.000 / 1M $2.000 / 1M
Output Price $50.000 / 1M $10.000 / 1M
Total Input Tokens 135,958 135,496
Output Tokens 7,930 8,153
Reasoning Tokens 32,141 719,196
Response Time (avg) 13.59s 83.04s
Response Time (max) 40.17s 488.39s
Response Time (total) 298.90s 1826.84s
Parameters ~9.5T total (~878B active) ~1T total (~100B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#36 Claude Fable 5.1

high
Cost
$0.384
Time
102.5s
Tokens
7,824 tok

#39 Claude Sonnet 5.5

max
OpenRouter returned no showcase content (finish_reason: length).
Cost
$0.000
Time
571.7s
Tokens
0 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 8.4 7.4 88.9% 1 13.91s 10,608 520 6,503
Claude Sonnet 5.5 10.0 10.0 100.0% 0 55.26s 10,608 580 70,730

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