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Claude Fable 5.1 (medium) vs Gemini 3.8 Flash (low)

Claude Fable 5.1 (medium) leads on average score with 7.3 vs 7.2. Gemini 3.8 Flash (low) has the lower benchmark cost at $0.323 vs $3.197. Gemini 3.8 Flash (low) is faster at 7.54s vs 11.87s, with pass rates of 78.3% vs 81.2%.

Last updated at: 2026-10-01

Compared models

Rank
#133
Total Output Tokens
32,506
Response Time (avg)
11.87s
Total Cost
$3.197
Rank
#142
Total Output Tokens
42,741
Response Time (avg)
7.54s
Total Cost
$0.323
Recommended model Gemini 3.8 Flash (low)

Its score stays close to the best score here (7.2 vs 7.3), while costing about 9.9x less than Claude Fable 5.1 (medium).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 medium Release: 2026-09-02 Gemini 3.8 Flash Gemini 3.8 Flash low Release: 2026-09-02
Score 7.3 7.2
Rank #133 #142
Reliability 10.0 9.9
Consistency 7.9 8.2
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 78.3% 81.2%
Flaky tests 6 5
Total Runs 69 69
Cost per result 21.312 2.014
Total Cost $3.197 $0.323
Input Price $10.000 / 1M $0.750 / 1M
Output Price $50.000 / 1M $3.750 / 1M
Total Input Tokens 157,142 215,836
Output Tokens 8,149 9,452
Reasoning Tokens 24,357 33,289
Response Time (avg) 11.87s 7.54s
Response Time (max) 36.59s 67.18s
Response Time (total) 272.91s 173.36s
Parameters ~9.5T total (~878B active) ~500B total (~20B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#133 Claude Fable 5.1

medium
Cost
$0.244
Time
65.9s
Tokens
5,025 tok

#142 Gemini 3.8 Flash

low
Cost
$0.030
Time
45.8s
Tokens
8,023 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 7.0 5.0 77.8% 2 10.99s 10,608 525 4,376
Gemini 3.8 Flash 5.4 7.2 44.4% 1 4.31s 8,118 449 5,706

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