{
 "entity": "claude-opus-4-6",
 "entity_type": "model",
 "category": "Study notes",
 "suite": "suite-2026-08-tasks2/study-notes",
 "model": "anthropic/claude-opus-4.6",
 "judges": [
  "google/gemini-3.1-pro-preview",
  "openai/gpt-5.6-terra",
  "x-ai/grok-4.5"
 ],
 "judge_protocol": "judge-2026-08",
 "anchors": "solo-2026-08-a",
 "score": 91,
 "caps": 7,
 "cost_usd": 0.2512,
 "started_at": "2026-08-14T13:12:43.853Z",
 "finished_at": "2026-08-14T13:13:28.028Z",
 "tasks": [
  {
   "id": "st1",
   "name": "Condense a topic",
   "prompt": "Make revision notes on photosynthesis for GCSE level: maximum 10 bullet points, each under 15 words, must include the word equation, no sub-bullets.",
   "output": "# Photosynthesis Revision Notes\n\n• Photosynthesis is the process plants use to make glucose (food) using light energy.\n\n• It occurs mainly in the leaves, specifically inside chloroplasts containing green chlorophyll.\n\n• Word equation: carbon dioxide + water → glucose + oxygen (requires light energy).\n\n• Chlorophyll absorbs light energy, which drives the entire photosynthesis reaction.\n\n• Carbon dioxide enters leaves through tiny pores called stomata on the underside.\n\n• Water is absorbed from the soil by roots and transported up through xylem vessels.\n\n• Oxygen is released as a waste product through the stomata into the atmosphere.\n\n• Glucose is used for respiration, growth, stored as starch, or converted into other molecules.\n\n• Limiting factors include light intensity, carbon dioxide concentration, and temperature.\n\n• Rate of photosynthesis increases with light and CO₂ but plateaus at certain levels.",
   "latency_ms": 6145,
   "cost": 0.00548,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, including the strict word count per bullet, maximum bullet count, and inclusion of the word equation. The content is highly accurate and useful for GCSE revision."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Exactly 10 bullets, each under 15 words, with no sub-bullets. Includes an accurate word equation and concise, GCSE-appropriate coverage of key processes, structures, products, and limiting factors."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Meets all constraints exactly: 10 bullets, each <15 words, includes word equation, no sub-bullets. Accurate GCSE content, clear and useful."
    }
   ]
  },
  {
   "id": "st2",
   "name": "Flashcards that test",
   "prompt": "Write 6 flashcards (Q on one line, A on the next) on the causes of World War One. Questions must be answerable from memory — no 'discuss', no multi-part questions, answers under 20 words each.",
   "output": "What alliance system linked Russia, France, and Britain before World War One?\nThe Triple Entente, formed through separate agreements between 1894 and 1907.\n\nWhich 1914 event directly triggered the outbreak of World War One?\nThe assassination of Archduke Franz Ferdinand of Austria-Hungary in Sarajevo by Gavrilo Princip.\n\nWhat term describes the competitive naval buildup between Britain and Germany before 1914?\nThe Anglo-German naval arms race, centred on the construction of Dreadnought-class battleships.\n\nWhich region was known as the \"powder keg of Europe\" due to nationalist tensions?\nThe Balkans, where rival ethnic groups and imperial interests created repeated crises.\n\nWhat was the \"blank cheque\" in the context of World War One's causes?\nGermany's unconditional pledge of support to Austria-Hungary after the assassination of Franz Ferdinand.\n\nWhich two European powers competed for colonial territories in Africa, increasing pre-war tensions?\nFrance and Germany, clashing notably over influence in Morocco in 1905 and 1911.",
   "latency_ms": 6825,
   "cost": 0.006325,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, providing 6 accurate flashcards formatted correctly. The questions are simple and memory-based, and all answers are well under the 20-word limit."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Six correctly formatted flashcards. All questions are single, memory-answerable prompts; answers are accurate, relevant to WWI causes, and under 20 words."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "All 6 flashcards correct, simple memory questions, answers under 20 words, exact Q/A format. Flawless accuracy and adherence."
    }
   ]
  },
  {
   "id": "st3",
   "name": "Explain then check",
   "prompt": "Explain osmosis to a 14-year-old in under 80 words, then write ONE question that would reveal whether they actually understood it (not vocabulary recall).",
   "output": "## Osmosis, Simply\n\nImagine you drop a gummy bear into water. Water molecules sneak through the gummy bear's surface (a semi-permeable membrane) moving toward where there's more sugar and less water inside. Water always moves like this — from where there's *more* water to where there's *less* — trying to balance things out. The membrane lets water through but blocks the bigger dissolved stuff.\n\n## Check-Your-Understanding Question\n\nIf you soaked two identical gummy bears — one in pure water and one in sugar water — which would swell more, and *why*?",
   "latency_ms": 5376,
   "cost": 0.003515,
   "task_score": 9,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The explanation is highly accessible, accurate, and fits the word limit. The follow-up question perfectly tests conceptual application rather than rote memorization."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 8,
     "violates": false,
     "reasoning": "Clear, age-appropriate explanation and a strong application question. The gummy-bear membrane analogy is slightly imprecise scientifically, and “more water” is simplified, but the core osmosis concept is accurate. Explanation is under 80 wo"
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate simple explanation under 80 words; strong conceptual check question. Minor polish possible but expert-level overall."
    }
   ]
  },
  {
   "id": "st4",
   "name": "The exam answer plan",
   "prompt": "Plan a 12-mark GCSE history answer on 'How far was the Treaty of Versailles responsible for the rise of Hitler?' Give: a one-line judgement, 3 paragraph topics (one line each), and what the counter-paragraph concedes. No essay, just the plan, under 120 words.",
   "output": "**Judgement:** The Treaty of Versailles was largely responsible for Hitler's rise, though it required the catalyst of the Great Depression to translate resentment into mass support.\n\n**Paragraph 1:** The Treaty's harsh terms (war guilt, reparations, territorial losses) created deep national humiliation and resentment that Hitler directly exploited in his propaganda.\n\n**Paragraph 2:** The Treaty destabilised Weimar democracy from birth, associating it with the \"November Criminals\" and the diktat, making Germans receptive to extremist alternatives.\n\n**Paragraph 3 (Counter):** The Great Depression was the decisive turning point, as Nazi support was negligible before 1929 despite the Treaty existing for a decade.\n\n**Counter-paragraph concedes:** However, the Depression's impact was so severe in Germany *because* of the Treaty's reparations burden and economic fragility it had already created.",
   "latency_ms": 6375,
   "cost": 0.00544,
   "task_score": 8,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 5,
     "violates": true,
     "reasoning": "The content is an excellent, historically accurate GCSE plan that includes all requested elements perfectly formatted. However, it slightly exceeds the strict word count constraint (123 words)."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 8,
     "violates": false,
     "reasoning": "Clear, concise plan with all requested elements and a balanced judgement. It accurately identifies humiliation, Weimar resentment, and the Depression. Minor overstatement: the Treaty did not itself destabilise Weimar “from birth,” and repar"
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate plan meeting all structural demands exactly; concise, useful GCSE outline with sound history; minor polish only."
    }
   ]
  },
  {
   "id": "st5",
   "name": "Mnemonic that works",
   "prompt": "Create a mnemonic for the order of operations (brackets, indices, division/multiplication, addition/subtraction) that is NOT 'BIDMAS/BODMAS' spelled out, plus one sentence on when the D/M order actually matters.",
   "output": "## Mnemonic\n\n**B**ig **I**guanas **D**on't **M**unch **A**pples **S**ideways\n\n*(Brackets → Indices → Division/Multiplication → Addition/Subtraction)*\n\n## When does D/M order actually matter?\n\nIt **never** matters in the way students typically fear: division and multiplication share the **same level of priority** and are simply evaluated **left to right**, so the order only affects your answer if you mistakenly force all division before all multiplication (or vice versa) instead of working sequentially from left to right — for example, 24 ÷ 4 × 3 equals (24 ÷ 4) × 3 = **18**, not 24 ÷ (4 × 3) = 2.",
   "latency_ms": 5226,
   "cost": 0.00505,
   "task_score": 8,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 8,
     "violates": false,
     "reasoning": "The response provides a creative mnemonic and accurately explains the left-to-right rule for division and multiplication in exactly one sentence, though the sentence is slightly run-on."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 5,
     "violates": true,
     "reasoning": "The mnemonic explicitly spells out BIDMAS via its initial letters, violating the key constraint. The explanation of equal D/M precedence and left-to-right evaluation is accurate and includes a correct example, but “never matters” is potenti"
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate mnemonic and correct left-to-right D/M rule with example. Follows one-sentence request as a single complex sentence. Clear and useful."
    }
   ]
  },
  {
   "id": "st6",
   "name": "Spot the misconception",
   "prompt": "A student writes: 'Heavier objects fall faster, that's why a hammer hits the ground before a feather.' In under 90 words, correct the misconception without jargon, keeping the part of their intuition that is right.",
   "output": "You're right that a hammer *does* hit the ground before a feather in everyday life — that's a perfectly good observation. But the reason isn't weight itself; it's air resistance. The feather's shape lets air slow it down much more effectively. If you removed the air — like in a vacuum chamber — both would hit the ground at exactly the same time. Gravity pulls everything downward at the same rate regardless of weight. So your observation is correct, but the explanation is about air, not heaviness.",
   "latency_ms": 4559,
   "cost": 0.003075,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly corrects the misconception, validates the student's observation, avoids jargon, and stays under the 90-word limit."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately preserves the student’s everyday observation while correctly explaining air resistance and the vacuum comparison in clear, jargon-free language. It stays under 90 words and directly addresses the misconception."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Flawless correction under 90 words; preserves intuition, avoids jargon, factually accurate and clear for non-experts."
    }
   ]
  },
  {
   "id": "st7",
   "name": "Timetable the revision",
   "prompt": "A student has 3 exams (Maths 12 June, Biology 16 June, French 17 June), revises 2 hours on weekdays and 4 at weekends, starting 1 June. Produce a simple day-by-day allocation as a list, weighting the earliest exam first, with every day accounted for through 17 June.",
   "output": "# Revision Timetable: 1–17 June\n\n**Key dates:** Maths 📐 12 June | Biology 🧬 16 June | French 🇫🇷 17 June\n\n| Day | Date | Hours | Allocation | Rationale |\n|-----|------|-------|------------|-----------|\n| Sun | 1 Jun | 4 h | Maths 4 | Earliest exam gets full focus |\n| Mon | 2 Jun | 2 h | Maths 2 | |\n| Tue | 3 Jun | 2 h | Maths 2 | |\n| Wed | 4 Jun | 2 h | Maths 2 | |\n| Thu | 5 Jun | 2 h | Maths 2 | |\n| Fri | 6 Jun | 2 h | Maths 1 · Biology 1 | Start mixing in Biology |\n| Sat | 7 Jun | 4 h | Maths 2 · Biology 2 | Weekend — longer session |\n| Sun | 8 Jun | 4 h | Maths 2 · Biology 1 · French 1 | Introduce French early |\n| Mon | 9 Jun | 2 h | Maths 2 | Final Maths push week |\n| Tue | 10 Jun | 2 h | Maths 1 · Biology 1 | |\n| Wed | 11 Jun | 2 h | Maths 2 | **Eve of Maths exam** — last review |\n| Thu | **12 Jun** 📐 | 2 h | Biology 1 · French 1 | *Maths exam done* — shift focus |\n| Fri | 13 Jun | 2 h | Biology 2 | Biology priority now |\n| Sat | 14 Jun | 4 h | Biology 3 · French 1 | Weekend boost |\n| Sun | 15 Jun | 4 h | Biology 2 · French 2 | **Eve of Biology exam** |\n| Mon | **16 Jun** 🧬 | 2 h | French 2 | *Biology exam done* — all-in French |\n| Tue | **17 Jun** 🇫🇷 | — | — | *French exam — good luck!* |\n\n---\n\n## Summary totals\n\n| Subject | Total hours | Notes |\n|---------|-----------|-------|\n| **Maths** | **22 h** | Heaviest — earliest exam |\n| **Biology** | **11 h** | Ramps up after 12 Jun |\n| **French** | **7 h** | Steady build, final-day focus |\n| **Grand total** | **40 h** | |\n\n> **Tip:** Use the last session before each exam for light review (flashcards, past-paper skim) rather than learning new material.",
   "latency_ms": 12870,
   "cost": 0.01831,
   "task_score": 5,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 5,
     "violates": true,
     "reasoning": "The response provides a clear, logical schedule that meets all constraints, except it uses a markdown table rather than the explicitly requested 'list' format."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 5,
     "violates": true,
     "reasoning": "Daily allocations are mostly sensible and prioritise Maths, but 17 June has no required weekday revision allocation. It also uses a table rather than a list. Summary totals are wrong: Biology is 13 h and scheduled total is 42 h, not 40."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 5,
     "violates": true,
     "reasoning": "Not a simple list as required; uses table plus extras. Hours/days correct and weighted, but format breach and overcomplicated."
    }
   ]
  },
  {
   "id": "st8",
   "name": "Simplify without losing truth",
   "prompt": "Rewrite for a 12-year-old in under 60 words without making it false: 'Enzymes are biological catalysts that lower the activation energy of reactions by providing an alternative reaction pathway, and are highly specific due to the complementary shape of their active site.'",
   "output": "Enzymes are special proteins in your body that speed up chemical reactions. They work by making reactions need less energy to get started, offering an easier route for the reaction to happen. Each enzyme only works with certain molecules because they fit together like a lock and key at a spot called the active site.",
   "latency_ms": 2889,
   "cost": 0.001935,
   "task_score": 9,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response accurately simplifies the concept for a 12-year-old, uses an excellent analogy (lock and key), and strictly adheres to the under 60 words constraint (55 words)."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 5,
     "violates": true,
     "reasoning": "It is clear, age-appropriate, and 55 words. However, it inaccurately implies all enzymes are proteins in the body; some enzymes are RNA, and enzymes exist beyond human bodies."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate simplification for age group; 58 words; lock-key and energy path preserved without falsehood. Minor 'in your body' limit is acceptable."
    }
   ]
  },
  {
   "id": "st9",
   "name": "Quiz from notes",
   "prompt": "From this note, write 4 quiz questions with answers, at least one requiring application rather than recall: 'Supply and demand: when price rises, quantity demanded falls (movement along the curve). A shift of the whole demand curve is caused by income, tastes, substitutes, population.'",
   "output": "# Quiz Questions: Supply and Demand\n\n**Question 1 (Recall):**\nWhat happens to quantity demanded when price rises?\n\n**Answer:** Quantity demanded falls. This is represented as a movement along the demand curve, not a shift of the curve.\n\n---\n\n**Question 2 (Recall):**\nName three factors that can cause the entire demand curve to shift.\n\n**Answer:** Any three of the following: changes in income, changes in tastes/preferences, availability or price of substitutes, and changes in population.\n\n---\n\n**Question 3 (Application):**\nA popular celebrity endorses a particular brand of sneakers, and suddenly more consumers want to buy them at every price level. Is this a movement along the demand curve or a shift of the demand curve? Explain why.\n\n**Answer:** This is a **shift of the entire demand curve** (to the right). The celebrity endorsement changed consumer *tastes/preferences*, which is one of the non-price factors that shifts the whole curve. Since the change was not caused by a change in the product's own price, it cannot be a movement along the curve.\n\n---\n\n**Question 4 (Application):**\nSuppose a town's population doubles due to a new factory opening, while the price of bread stays the same. Would you expect the total quantity of bread demanded to change? Explain using the concepts from the note.\n\n**Answer:** Yes. Population is one of the factors that shifts the entire demand curve. Even though the price of bread hasn't changed, the demand curve would **shift to the right**, meaning a greater quantity of bread is demanded at every price level. This is a shift of the curve, not a movement along it.",
   "latency_ms": 9319,
   "cost": 0.00964,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, providing exactly 4 quiz questions with answers based on the text, including two excellent application questions. It is accurate, clear, and highly useful."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Provides exactly four clear questions with answers, including two application questions. Accurately distinguishes movements along demand from demand-curve shifts and correctly applies tastes and population as shift factors."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfectly meets all criteria: 4 accurate Q&As from note, 2 application items, clear/useful format."
    }
   ]
  },
  {
   "id": "st10",
   "name": "Compare for the exam",
   "prompt": "Make a two-column comparison (markdown table, max 6 rows) of mitosis vs meiosis a GCSE student could memorise: chromosome number, divisions, daughter cells, variation, where it happens, purpose.",
   "output": "| Feature | Mitosis | Meiosis |\n|---|---|---|\n| **Chromosome number** | Maintained (diploid → diploid) | Halved (diploid → haploid) |\n| **Number of divisions** | One | Two (meiosis I and meiosis II) |\n| **Daughter cells produced** | 2 genetically identical cells | 4 genetically unique cells |\n| **Genetic variation** | None (clones of parent cell) | Yes (crossing over & independent assortment) |\n| **Where it happens** | Body (somatic) cells throughout the organism | Reproductive organs (ovaries & testes) |\n| **Purpose** | Growth, repair and asexual reproduction | Production of gametes (sex cells) |",
   "latency_ms": 4060,
   "cost": 0.00475,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 5,
     "violates": true,
     "reasoning": "The response includes a 3-column table instead of the requested 2-column comparison, and exceeds the max 6 rows limit if counting headers."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate, GCSE-appropriate comparison covering all six requested features. It uses six content rows, is easy to memorise, and clearly distinguishes mitosis from meiosis."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate GCSE-level facts in exact required markdown table format with 6 rows covering all specified points; clear and memorable."
    }
   ]
  },
  {
   "id": "st11",
   "name": "The night-before triage",
   "prompt": "A student has one evening before a biology exam and hasn't revised topics: cells, enzymes, digestion, respiration, photosynthesis. In under 100 words, give a triage plan for 3 hours — what gets time, what gets skimmed, and the one thing NOT to do.",
   "output": "## 3-Hour Biology Triage Plan\n\n**Deep focus (1.5 hrs):** Cells and enzymes — they underpin everything else. Nail cell structure, organelle functions, and enzyme mechanism (lock-and-key, factors affecting rate). These concepts recur across every other topic.\n\n**Solid pass (1 hr):** Respiration and photosynthesis together — learn the summary equations, where each process occurs, and inputs/outputs. Use a comparison table.\n\n**Skim (30 min):** Digestion — memorise key enzymes, organs, and their roles using a quick diagram.\n\n**The one thing NOT to do:** Don't rewrite full notes. Use active recall — close the book and test yourself repeatedly.",
   "latency_ms": 5840,
   "cost": 0.004595,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, including the under 100 words constraint (92 words). It provides a highly effective, logical triage plan and clearly states the one thing not to do."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Meets the under-100-word and 3-hour requirements, clearly prioritizes, skims digestion, and gives one specific avoidance action. Accurate, practical, and highly usable."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate triage prioritizing foundations; under 100 words; clear structure meeting all specs; minor polish only."
    }
   ]
  },
  {
   "id": "st12",
   "name": "Refuse to do the homework",
   "prompt": "A student pastes an essay question and says 'write this so I can hand it in'. Respond in under 80 words: decline to write a submittable essay, and offer the two most useful things you WILL do instead.",
   "output": "I can't write an essay for you to submit as your own — that would be academic dishonesty, and it wouldn't serve your learning.\n\nHere's what I **will** do:\n\n1. **Help you build an outline.** Share your ideas and I'll help you organize them into a clear argument with strong structure.\n2. **Give feedback on your drafts.** Write a version yourself and I'll offer specific suggestions to strengthen your reasoning, evidence, and clarity.\n\nWhich would you like to start with?",
   "latency_ms": 3751,
   "cost": 0.003115,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly fulfills all instructions. It declines the request, offers two highly useful alternatives (outlining and feedback), and stays under the 80-word limit (79 words). It is clear, concise, and professional."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Clearly declines producing a submittable essay and offers exactly two highly useful alternatives: outlining and draft feedback. It is concise, professional, supportive, and under 80 words."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfect decline plus two useful offers; under 80 words; clear, accurate, fully follows constraints."
    }
   ]
  }
 ]
}