THE HALO EXPERIMENT_

A Habsburg jaw is an anatomical feature — mandibular prognathism, a heavily protruding lower jaw. It implies nothing about royalty. So why do the frogs keep getting crowns? Each month, every model is asked for the same anatomy three ways, in fully independent calls: the cultural term, the clinical term, and a plain description. Any crowns that appear under one name but not another are summoned by the word alone. Back to the benchmark →

A · "Habsburg jaw"

9/17

models with royal imagery in their SVG (September 2026)

B · "mandibular prognathism"

4/17

models with royal imagery in their SVG (September 2026)

C · "protruding lower jaw"

3/17

models with royal imagery in their SVG (September 2026)

anthropic/claude-fable-5 Anthropic
anthropic/claude-fable-5 — A · "Habsburg jaw" ♛
anthropic/claude-fable-5 — B · "mandibular prognathism"
anthropic/claude-fable-5 — C · "protruding lower jaw" ♛
anthropic/claude-opus-5 Anthropic
anthropic/claude-opus-5 — A · "Habsburg jaw" ♛
anthropic/claude-opus-5 — B · "mandibular prognathism"
anthropic/claude-opus-5 — C · "protruding lower jaw"
anthropic/claude-sonnet-5 Anthropic
anthropic/claude-sonnet-5 — A · "Habsburg jaw" ♛
anthropic/claude-sonnet-5 — B · "mandibular prognathism" ♛
anthropic/claude-sonnet-5 — C · "protruding lower jaw"
anthropic/claude-haiku-4.5 Anthropic
anthropic/claude-haiku-4.5 — A · "Habsburg jaw"
anthropic/claude-haiku-4.5 — B · "mandibular prognathism"
anthropic/claude-haiku-4.5 — C · "protruding lower jaw"
openai/gpt-5.5 OpenAI
openai/gpt-5.5 — A · "Habsburg jaw"
openai/gpt-5.5 — B · "mandibular prognathism"
openai/gpt-5.5 — C · "protruding lower jaw"
openai/gpt-5.6-sol OpenAI
openai/gpt-5.6-sol — A · "Habsburg jaw"
openai/gpt-5.6-sol — B · "mandibular prognathism"
openai/gpt-5.6-sol — C · "protruding lower jaw"
openai/gpt-5.4-mini OpenAI
openai/gpt-5.4-mini — A · "Habsburg jaw"
openai/gpt-5.4-mini — B · "mandibular prognathism"
openai/gpt-5.4-mini — C · "protruding lower jaw"
google/gemini-2.5-pro Google
google/gemini-2.5-pro — A · "Habsburg jaw"
google/gemini-2.5-pro — B · "mandibular prognathism"
google/gemini-2.5-pro — C · "protruding lower jaw"
google/gemini-3.6-flash Google
google/gemini-3.6-flash — A · "Habsburg jaw" ♛
google/gemini-3.6-flash — B · "mandibular prognathism" ♛
google/gemini-3.6-flash — C · "protruding lower jaw" ♛
x-ai/grok-4.5 xAI
x-ai/grok-4.5 — A · "Habsburg jaw" ♛
x-ai/grok-4.5 — B · "mandibular prognathism"
x-ai/grok-4.5 — C · "protruding lower jaw"
deepseek/deepseek-v4-pro DeepSeek
deepseek/deepseek-v4-pro — A · "Habsburg jaw" ♛
deepseek/deepseek-v4-pro — B · "mandibular prognathism"
deepseek/deepseek-v4-pro — C · "protruding lower jaw"
deepseek/deepseek-v4-flash DeepSeek
deepseek/deepseek-v4-flash — A · "Habsburg jaw" ♛
deepseek/deepseek-v4-flash — B · "mandibular prognathism"
deepseek/deepseek-v4-flash — C · "protruding lower jaw"
moonshotai/kimi-k3 Moonshot
moonshotai/kimi-k3 — A · "Habsburg jaw"
moonshotai/kimi-k3 — B · "mandibular prognathism"
moonshotai/kimi-k3 — C · "protruding lower jaw"
z-ai/glm-5.1 Z.ai
z-ai/glm-5.1 — A · "Habsburg jaw" ♛
z-ai/glm-5.1 — B · "mandibular prognathism" ♛
z-ai/glm-5.1 — C · "protruding lower jaw"
qwen/qwen3.7-max Alibaba
qwen/qwen3.7-max — A · "Habsburg jaw" ♛
qwen/qwen3.7-max — B · "mandibular prognathism" ♛
qwen/qwen3.7-max — C · "protruding lower jaw" ♛
meta-llama/llama-4-maverick Meta
meta-llama/llama-4-maverick — A · "Habsburg jaw"
meta-llama/llama-4-maverick — B · "mandibular prognathism"
meta-llama/llama-4-maverick — C · "protruding lower jaw"
mistralai/mistral-large-2512 Mistral
mistralai/mistral-large-2512 — A · "Habsburg jaw"
mistralai/mistral-large-2512 — B · "mandibular prognathism"
mistralai/mistral-large-2512 — C · "protruding lower jaw"