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Claude Fable 5.1 (low) vs Gemini 3.5 Flash

Claude Fable 5.1 (low) leads on average score with 6.2 vs 6.1. Gemini 3.5 Flash has the lower benchmark cost at $1.752 vs $3.395. Claude Fable 5.1 (low) is faster at 11.40s vs 14.13s, with pass rates of 55.1% vs 68.1%.

Last updated at: 2026-10-16

Compared models

Rank
#260
Total Output Tokens
26,073
Response Time (avg)
11.40s
Total Cost
$3.395
Rank
#261
Total Output Tokens
153,595
Response Time (avg)
14.13s
Total Cost
$1.752
Recommended model Gemini 3.5 Flash

Its score stays close to the best score here (6.1 vs 6.2), while costing about 1.9x less than Claude Fable 5.1 (low).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 low Release: 2026-09-02 Gemini 3.5 Flash Gemini 3.5 Flash none Release: 2026-05-19
Score 6.2 6.1
Rank #260 #261
Reliability 10.0 10.0
Consistency 8.9 8.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 55.1% 68.1%
Flaky tests 3 4
Total Runs 69 69
Cost per result 30.862 12.511
Total Cost $3.395 $1.752
Input Price $10.000 / 1M $1.500 / 1M
Output Price $50.000 / 1M $9.000 / 1M
Cache Read Price $0.250 / 1M $0.150 / 1M
Cache Write Price $12.500 / 1M $0.084 / 1M
Total Input Tokens 209,116 246,061
Output Tokens 10,031 3,828
Reasoning Tokens 16,042 149,767
Response Time (avg) 11.40s 14.13s
Response Time (max) 34.77s 85.26s
Response Time (total) 262.14s 268.55s
Parameters ~9.5T total (~878B active) ~500B total (~20B 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.

#260 Claude Fable 5.1

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

#261 Gemini 3.5 Flash

none
Cost
$0.225
Time
125.5s
Tokens
25,004 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
Gemini 3.5 Flash 8.8 7.8 88.9% 1 34.69s 8,122 456 75,471

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