2025 · Paper 1 · Physics
Question 12
The printed question, the official key, and each model’s JSON answer plus the reasoning it wrote.
PhysicsPaper 1Numerical
Q12
Official {'min': 75, 'max': 79}, {'min': 94, 'max': 95}
Model answers
Claude Fable 5.1
Anthropic
Correct4 / 4
75.6
Claude Fable 5.1 reasoning
b = mλD/d b = 3 × 600×10⁻⁹ × 1 / (5×10⁻³) = 1800×10⁻⁹/5×10⁻³ = 3.6×10⁻⁴ m = 360 μm Relative error: Δb/b = ΔD/D + Δd/d = 0.01/1 + 1/5 = 0.01 + 0.2 = 0.21 Δb = 0.21 × 360 μm = 75.6 μm
GPT 6 Astra
OpenAI
Correct4 / 4
75.6
GPT 6 Astra reasoning
No written reasoning was returned for this item.
GPT 5.6 Luna
OpenAI
Correct4 / 4
76
GPT 5.6 Luna reasoning
No written reasoning was returned for this item.