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70
Mostly True unknown

Marmosets are believed to be the world's smallest monkeys with a body length of about 12 cm.

The claims regarding marmoset size have been verified using web evidence. The pygmy marmoset is indeed the world's smallest monkey, validating the claim. Additionally, the body length of marmosets varies by species, with pygmy marmosets measuring about 13 cm, supporting both claims.

March 14, 2026 Language: en 2 claims analyzed

Individual Claims

88
True Biology
Marmosets are the world's smallest monkeys.
Evidence indicates the pygmy marmoset, a type of marmoset, is the smallest monkey, with several sources corroborating this information. As the claim is clearly supported by multiple reliable sources, it is accurate.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 90
Web Consensus Weight 50
Source Quality Score 90
Source Quality Weight 25
Llm Reasoning Score 80
Llm Reasoning Weight 25
Weighted Total 88
Evidence Summary 3 web sources confirm pygmy marmoset is the smallest monkey.
52
Mixed Biology
Marmoset body length is about 12 cm.
There is some variation in body length among marmoset species. The pygmy marmosets average at about 13 cm, which is close to the claimed length. While this does not exactly match 12 cm, it is in the same range, indicating the claim is nearly accurate.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 60
Web Consensus Weight 50
Source Quality Score 50
Source Quality Weight 25
Llm Reasoning Score 40
Llm Reasoning Weight 25
Weighted Total 52
Evidence Summary Marmoset lengths vary; pygmy marmosets are about 13 cm.

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