TWSBI ECO
fountain pen
GenRank Score
38.1
An affordable, piston-filling demonstrator fountain pen from Taiwanese brand TWSBI, known for its large ink capacity and clear barrel.
Also Known As
TWSBI ECO
2 questions•1 category
Score History
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Average Rank
#6.0
Median
#6
Range
#2–#11
Consistency
☆☆☆σ=3.4
🏆Top 3 in 1/4 models
🎯Top 5 in 2/4 models
Rankings by Model
Claude Sonnet 5 #2Sonar #4GPT-5.4 mini #7Grok 4.3 #11
Score History
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Average Rank
#8.0
Median
#10
Range
#4–#10
Consistency
★☆☆σ=2.8
🎯Top 5 in 1/3 models
Rankings by Model
GPT-5.4 mini #4Claude Sonnet 5 #10Gemini 3.1 Flash Lite #10