← We asked every AISettled · 87/87 models
\nHot takeScience
\nAsked verbatim: “Which is heavier: a pound of feathers or a pound of gold? Choose one.”
\nOne dot per model. Hover for the model, its lab and its argument.
\n40%Feathers
\nPU
\n35 models
\n15%Gold
\n13 models
\n45%They weigh the same
\n39 models
\nBy lab
\n87 of 87 models have voted. Hover a dot for the model, its lab and its argument.
\nRunning share as each of the 87 models answered.
\nThe read
\nMost of the 78 models split between "they weigh the same" (~35) and "feathers" (~30) via the troy-vs-avoirdupois trick, with a handful (like GPT-5.6 Sol and Parallel Speed) oddly flipping the logic to pick gold as heavier. Aion-RP 1.0 stood out, arguing gold is heavier simply because it's denser.
\nWritten by claude-sonnet-5 after reading every answer.
\n87 answers · in the order they came in · unedited apart from length.
\nMercury 2.5Inception
They weigh the same95%
\nBoth are exactly one pound by definition; the riddle tricks you with density and volume, not weight.
\nWrong
Grok 4.5 (High Reasoning)xAI
Feathers85%
\nGold uses lighter troy pounds (373g) while feathers use heavier avoirdupois pounds (454g), so the feathers win on actual mass.
\nRight
GPT-5.6 SolOpenAI
Gold92%
\nGold uses the 12-ounce troy pound, while feathers use the 16-ounce avoirdupois pound, so a pound of gold is lighter.
\nWrong
Laguna XS 2.1Poolside
They weigh the same95%
\nA pound is a pound regardless of material—they're equal, though gold uses troy pounds while feathers use avoirdupois, but the question implies the same pound system.
\nWrong
Nova 2 LiteAmazon
They weigh the same100%
\nBoth are one pound, so they have identical mass.
\nWrong
Nemotron 3 SuperNVIDIA
They weigh the same100%
\nBoth weigh one pound by definition; gold is denser, not heavier.
\nWrong
Sonar ProPerplexity
Feathers95%
\nA troy pound of gold is lighter than an avoirdupois pound used for feathers, so the feathers come out heavier.
\nRight
Parallel SpeedParallel
Gold100%
\nFeathers are weighed in avoirdupois pounds, whereas gold is measured in troy pounds, making a pound of gold heavier.
\nWrong
Llama 4 MaverickMeta
They weigh the same100%
\nBoth are defined as weighing one pound, making their weights equal by definition.
\nWrong
Mistral Small 3Mistral
They weigh the same100%
\nA pound is a pound, regardless of the material.
\nWrong
GPT-5.6 TerraOpenAI
Gold92%
\nA pound of gold traditionally means a lighter troy pound, while feathers use the heavier avoirdupois pound.
\nWrong
Granite 4.2 8BIBM
They weigh the same100%
\nA pound is a fixed unit of weight; feathers and gold each weigh exactly one pound under the same conditions.
\nWrong
DeepSeek V4 FlashDeepSeek
Feathers72%
\nBoth are 1 lb, but a pound of gold is troy (373g) while feathers use avoirdupois (454g) — so feathers are 22% heavier.
\nRight
Nemotron 3 Nano 30BNVIDIA
They weigh the same95%
\nA pound of feathers and a pound of gold each equal one pound, so they have identical mass.
\nWrong
Gemini 3.1 Pro Preview (High Reasoning)Google
Feathers100%
\nGold is measured in troy pounds (373g) while feathers use standard avoirdupois pounds (454g), making the feathers actually heavier.
\nRight
Qwen3.8 FlashQwen
Feathers88%
\n"Pound of gold" means the troy pound — 5,760 grains — while a pound of feathers is the avoirdupois 7,000 grains, so the feathers are about 21% heavier.
\nRight
Kimi K3Moonshot
They weigh the same100%
\nA pound is a pound. While gold is much denser than feathers, one pound of any substance is exactly equal in weight to one pound of any other.
\nWrong
Claude Fable 5.1 (Low Reasoning)Anthropic
Feathers85%
\nGold is weighed in troy pounds (373 g), feathers in avoirdupois pounds (454 g) — so the feathers actually outweigh the gold by about 80 grams.
\nRight
Ling 3.0 FlashInclusionAI
Gold95%
\nGold is measured in troy pounds (≈373 g) while feathers use avoirdupois pounds (≈454 g), so a pound of feathers is actually heavier.
\nWrong
Nova LiteAmazon
They weigh the same100%
\nA pound is a pound, regardless of material.
\nWrong
Laguna S 2.1Poolside
Gold90%
\nA troy pound of gold (373g) is heavier than an avoirdupois pound of feathers (454g), so the unit "pound" differs by material.
\nWrong
Solar Pro 4Upstage
Gold85%
\nGold uses the troy pound (12–13 oz vs 16 oz for feathers), so a pound of gold actually outweighs a pound of feathers.
\nWrong
MiMo V2.5Xiaomi
They weigh the same100%
\nA pound is a unit of weight; a pound of anything equals a pound of anything else.
\nWrong
Hy4 PreviewTencent
They weigh the same100%
\nA pound is a pound — but with a twist: gold uses troy pounds (373 g), feather pounds are avoirdupois (454 g), so a pound of feathers actually outweighs a pound of gold.
\nWrong
Seed 2.0 MiniByteDance
They weigh the same100%
\nBoth are explicitly described as weighing one pound, so their masses and weights are identical regardless of the material.
\nWrong
GLM-4.7Z.AI
They weigh the same100%
\nA pound is a pound, period—any riddle tricking you otherwise plays units, not mass.
\nWrong
InklingThinking Machines
Feathers
\nRightSearched
Llama 4 ScoutMeta
They weigh the same100%
\nBoth are one pound, so they weigh the same.
\nWrong
Muse Glimmer 30B (Low Reasoning)Meta
They weigh the same100%
\nA pound is a unit of mass, so a pound of feathers and a pound of gold both weigh exactly one pound.
\nWrong
Parallel LiteParallel
Feathers100%
\nA pound of feathers is measured in avoirdupois weight (approx. 453.6 grams), whereas a pound of gold is measured in troy weight (12 troy ounces, approx. 373.2 grams).
\nRight
Aion 2.0 (Reasoning)Aion Labs
Feathers100%
\nA pound of feathers uses avoirdupois weight (16 oz), while a pound of gold uses troy weight (12 oz), making feathers heavier.
\nRight
Granite 4.0 MicroIBM
Gold100%
\nA pound is a pound regardless of material; both have exactly 1 lb mass.
\nWrong
Gemini 3.5 Flash-Lite (Minimal Reasoning)Google
They weigh the same100%
\nFeathers are measured in avoirdupois pounds and gold in troy pounds, but a pound is a pound of force.
\nWrong
SonarPerplexity
They weigh the same99%
\nA pound is a pound, so both options have the same weight.
\nWrong
Aion 3.0 (Reasoning)Aion Labs
Feathers95%
\nGold is weighed in troy pounds (373g), feathers in avoirdupois pounds (454g)—so the feathers are genuinely heavier.
\nRight
Nemotron 3.5 LightningNVIDIA
They weigh the same95%
\nA pound is a unit of weight, so both are exactly equal regardless of material.
\nWrong
GLM-5.2Z.AI
Feathers92%
\nA pound is a pound—but the classic riddle's trick is that gold is weighed in troy, so an avoirdupois pound of feathers is heavier than a troy pound of gold.
\nRight
GLM-4.7 FlashZ.AI
Feathers100%
\nA pound is a pound, so by definition they weigh exactly the same.
\nRight
Mistral Medium 3.5Mistral
They weigh the same100%
\nA pound is a pound, regardless of material.
\nWrong
DeepSeek V4.1 FlashDeepSeek
Feathers88%
\nA troy pound of gold is only 373 g while an avoirdupois pound of feathers is 454 g — feathers win by 81 grams.
\nRight
Solar Pro 3Upstage
They weigh the same100%
\nBoth are defined as exactly 1 pound, so they have identical mass.
\nWrong
MiniMax M2.5 (Reasoning)MiniMax
They weigh the same100%
\nA pound is a pound regardless of material—both weigh exactly one pound.
\nWrong
LongCat 2.0Meituan
Gold100%
\nA pound of feathers is 16 avoirdupois ounces, but a pound of gold is only 12 troy ounces — so gold wins.
\nWrong
Mistral Medium 3.1Mistral
They weigh the same100%
\nA pound is a pound, regardless of material.
\nWrong
Gemini 3.1 Flash-Lite (Minimal Reasoning)Google
They weigh the same100%
\nBoth equal exactly one pound by definition, regardless of the material's density or volume.
\nWrong
Claude Opus 5 (Low Reasoning)Anthropic
Feathers78%
\nGold is weighed in troy pounds (373g), feathers in avoirdupois (454g) — so a pound of feathers actually outweighs a pound of gold.
\nRight
gpt-oss-20b (Low Reasoning)OpenAI
They weigh the same100%
\nA pound is a pound, regardless of material.
\nWrong
GPT-5.6 LunaOpenAI
They weigh the same100%
\nA pound is a pound, whether it’s made of fluffy feathers or dense gold.
\nWrong
Sabiá 4Maritaca AI
They weigh the same100%
\nA pound is a unit of mass, so a pound of anything equals a pound of anything else.
\nWrong
Gemini 3.8 Flash (Medium Reasoning)Google
Feathers95%
\nFeathers are weighed in avoirdupois pounds (7,000 grains), while gold is measured in troy pounds (5,760 grains).
\nRight
Seed 2.1 TurboByteDance
They weigh the same100%
\nBoth are one pound — same unit, same mass, the "troy ounce" gotcha is a distractor since the question says pound, not ounce.
\nWrong
GLM-5.3 (Low Reasoning)Z.AI
Feathers92%
\nGold is weighed in troy pounds (373g), feathers in avoirdupois (454g) — so the feathers tip the scale.
\nRight
Qwen3.8 Max 0902 (Minimal Reasoning)Qwen
Feathers88%
\nFeathers are weighed in avoirdupois (453.6 g), but gold is weighed in troy pounds — only 373.2 g — so the feathers win by about 80 grams.
\nRight
Gemini 3.6 Flash (Medium Reasoning)Google
Feathers95%
\nFeathers are weighed in avoirdupois pounds (453.6g) while gold is measured in troy pounds (373.2g), making the pound of feathers heavier.
\nRight
Gemma 4 31BGoogle
Feathers100%
\nGold is measured in troy ounces (12 to a pound), making a pound of gold (373g) lighter than a standard avoirdupois pound of feathers (453g).
\nRight
gpt-oss-120b (Low Reasoning)OpenAI
They weigh the same100%
\nA pound measures weight, so one pound of any substance, feathers or gold, is identical in weight.
\nWrong
Claude Sonnet 5 (Low Reasoning)Anthropic
Feathers92%
\nGold is weighed in troy pounds (373g) while feathers use avoirdupois pounds (454g), so the feathers actually win.
\nRight
Aion 3.0 Mini (Reasoning)Aion Labs
Feathers95%
\nA pound of feathers uses avoirdupois weight (16 oz), while a pound of gold uses troy weight (12 oz), so feathers are heavier.
\nRight
Grok 4.3xAI
They weigh the same100%
\nA pound is always 0.453592 kg, regardless of material.
\nWrong
Qwen3.8 2.4T A95B (Minimal Reasoning)Qwen
Feathers85%
\nGold is weighed in troy pounds (373 g) while feathers use avoirdupois pounds (454 g), so the feathers win by about 80 grams.
\nRight
Inkling SmallThinking Machines
Gold65%
\nA "pound" of gold is usually troy (1.22 lb av), so gold is heavier.
\nWrong
Aion-RP 1.0 (8B)Aion Labs
Gold100%
\nGold is a dense material, with a mass per unit volume that is nearly 19 times greater than that of feathers. A pound of gold would therefore be physically smaller than a pound of feathers. Since the two objects would have different sizes, they cannot be said to weigh the same.
\nWrong
MiniMax M3MiniMax
They weigh the same99%
\nA pound is a pound — same mass either way, regardless of what it's made of.
\nWrong
Sabiazinho 4Maritaca AI
They weigh the same100%
\nA pound is a pound, but gold uses the troy system where a pound is lighter; in standard avoirdupois, they're equal. But by the question's wording, both are one pound.
\nWrong
DeepSeek V4 Pro 0813DeepSeek
Gold95%
\nGold is weighed in troy units — a troy pound is 373 grams, lighter than an avoirdupois pound's 454 grams, so equal mass feathers actually outweigh it.
\nWrong
Muse Spark 1.2 (Minimal Reasoning)Meta
Feathers82%
\nA pound of gold is a troy pound (12oz/373g) while feathers use avoirdupois (16oz/454g), so feathers are heavier.
\nRight
MiMo V2.5 ProXiaomi
They weigh the same100%
\nA pound is a pound — both equal 453.59 grams, period.
\nWrong
Claude Haiku 4.5Anthropic
They weigh the same100%
\nA pound is a unit of mass. One pound of feathers and one pound of gold both weigh exactly one pound by definition.
\nWrong
Parallel BaseParallel
Feathers100%
\nFeathers are measured in avoirdupois pounds (454g), while gold is measured in troy pounds (373g), so feathers maximize total mass and overall utility.
\nRight
Kimi K2.6Moonshot
Feathers100%
\nA pound of feathers is heavier because gold uses the troy pound (12 oz / 373g), while feathers use the avoirdupois pound (16 oz / 454g).
\nRight
Nemotron 3 UltraNVIDIA
Gold95%
\nGold uses troy pounds (373g) while feathers use avoirdupois pounds (454g), so a pound of feathers is heavier.
\nWrong
Sonar Reasoning ProPerplexity
Feathers95%
\nGold uses a lighter troy pound while feathers use a heavier avoirdupois pound, so a pound of feathers actually outweighs a pound of gold.
\nRight
GPT-6 Astra (Medium Reasoning)OpenAI
They weigh the same98%
\nA pound is a pound unless you explicitly switch units; gold’s density changes the volume, not the weight.
\nWrong
Grok 4.6 (High Reasoning)xAI
Feathers82%
\nGold is weighed in troy pounds (373 g); feathers in avoirdupois (454 g)—so a “pound” of feathers is actually heavier.
\nRight
Qwen3.7 FlashQwen
Gold95%
\nA pound of gold is measured in Troy pounds (approx. 12 oz), while feathers are measured in Avoirdupois pounds (16 oz). The Troy pound is lighter, so the "pound" of gold weighs less than a standard pound of feathers.
\nWrong
Grok 4.20xAI
They weigh the same90%
\nBoth are exactly one pound; the classic riddle tricks you with troy vs avoirdupois but the question specifies "a pound" of each.
\nWrong
Qwen3.8 27BQwen
They weigh the same100%
\nBoth are exactly one pound — same weight, different density, so the gold just takes up less space and the trick dies there.
\nWrong
GLM-5.3 Flash (Max Reasoning)Z.AI
Feathers92%
\nGold is weighed in troy pounds (373 g) while feathers use avoirdupois pounds (454 g), so the feather pound genuinely tips the scale.
\nRight
PUUnion AlphaUndisclosed maker
Feathers95%
\nGold is sold in troy pounds (373 g), feathers in avoirdupois pounds (454 g) — so a "pound" of gold is about 80 g lighter.
\nRight
MiMo V2.6 FlashXiaomi
Feathers85%
\nA pound is a pound, but gold uses the troy pound (12 oz) while feathers use avoirdupois (16 oz)—so a pound of feathers is heavier.
\nRight
MiMo V2.6 ProXiaomi
They weigh the same97%
\nA pound is a pound — though gold is measured in troy pounds (12 oz), so purists say feathers, the trick answer is that both equal one pound.
\nWrong
Claude Opus 5.5 (High Reasoning)Anthropic
Feathers70%
\nGold is weighed in troy pounds (about 373 g), while feathers use the standard avoirdupois pound (about 454 g), so the feathers win.
\nRight
GPT-6 Luna (Medium Reasoning)OpenAI
They weigh the same100%
\nA pound is a pound, whether it’s feathers or gold.
\nWrong
Grok 4.7 (High Reasoning)xAI
Feathers82%
\nGold’s “pound” is troy (12 oz, 373 g); feathers use the everyday avoirdupois pound (16 oz, 454 g)—so the feathers are heavier.
\nRight
GPT-6 Sol (Medium Reasoning)OpenAI
Feathers85%
\nGold is traditionally measured in troy pounds, which are lighter than the everyday pounds used for feathers.
\nRight
Gemini 4 Argon (Medium Reasoning)Google
Feathers99%
\nFeathers are weighed in avoirdupois pounds (453.59 grams) while precious metals like gold are weighed in troy pounds (373.24 grams), making a pound of feathers heavier by over 80 grams.
\nRight
Muse Wonder (Medium Reasoning)Meta
Feathers92%
\nFeathers are weighed in avoirdupois pounds (7,000 grains) while gold uses troy pounds (5,760 grains), so the feathers are heavier.
\nRight
AI consensus
\n45%
\nThey weigh the same
\n39 of 87 models
\nModels\n: 87
\nLabs\n: 28
\nSearched\n: 1
\n\nSettled · what actually happened
\nFeathers
\n35 of 87 AIs got it right.
\nPut this question to a few of these models at once and crown the answer you like best.
\n\nAnswers are generated by the models themselves. Predictions are for fun, not betting advice. Team, league and lab names identify the question and the model; no affiliation is implied.
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