{
 "entity": "claude-opus-4-8",
 "entity_type": "model",
 "category": "Summarising",
 "suite": "suite-2026-08-tasks/summarising",
 "model": "anthropic/claude-opus-4.8",
 "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": 99,
 "caps": 1,
 "cost_usd": 0.1425,
 "started_at": "2026-08-13T09:37:16.796Z",
 "finished_at": "2026-08-13T09:37:39.137Z",
 "tasks": [
  {
   "id": "su1",
   "name": "Meeting notes to actions",
   "prompt": "From these notes, list ONLY the action items, each with its owner, as a bulleted list. If an owner is not stated, write 'unassigned'. Notes: 'Priya said the March invoices still aren't reconciled. Tom will chase the supplier by Friday. We discussed the new CRM — nobody has looked at pricing yet. Sam is on leave next week. The board pack needs the updated cashflow before the 20th; Priya said she'd do it if she has the numbers.'",
   "output": "- Chase the supplier by Friday — Tom\n- Look at CRM pricing — unassigned\n- Reconcile March invoices — unassigned\n- Update the cashflow for the board pack before the 20th — Priya",
   "latency_ms": 1888,
   "cost": 0.00263,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly extracts all action items, assigns the correct owners (or 'unassigned'), formats them as a bulleted list, and includes no extraneous text, following all instructions flawlessly."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "All action items are identified, non-actions are excluded, and each item has the correct stated owner or 'unassigned'. The conditional cashflow task is appropriately assigned to Priya."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "All action items correctly extracted with owners; only actions listed in required bullets; no extras or errors."
    }
   ]
  },
  {
   "id": "su2",
   "name": "Five-bullet summary",
   "prompt": "Summarise in exactly 5 bullets, max 15 words each, readable in 20 seconds: 'Our Q3 revenue rose 12% to £1.4m, driven mainly by the new retail channel which contributed £310k. Margins slipped from 41% to 37% because of higher shipping costs and a one-off warehouse move. Headcount stayed flat at 34. The main risk into Q4 is the supplier contract, which expires in November and has not been renegotiated. Cash at bank is £620k.'",
   "output": "- Q3 revenue up 12% to £1.4m, boosted by new retail channel.\n- Retail channel contributed £310k to overall growth.\n- Margins fell from 41% to 37% on shipping and warehouse costs.\n- Headcount flat at 34; cash at bank £620k.\n- Key Q4 risk: supplier contract expires November, not yet renegotiated.",
   "latency_ms": 2873,
   "cost": 0.004035,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, providing exactly 5 bullets with under 15 words each. It accurately and concisely captures all key financial and operational metrics from the source text."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise five-bullet summary within word limits. It captures all key metrics and risks; only minor loss is that the warehouse move was one-off."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Exactly 5 bullets, each ≤15 words, fully accurate coverage of all facts, clear and concise."
    }
   ]
  },
  {
   "id": "su3",
   "name": "Do not invent",
   "prompt": "Summarise this in under 50 words. If a fact is not present, do not supply it: 'The council approved the scheme on Tuesday. Three members voted against. Construction is expected to begin next year.' Then state on a separate line: 'Not stated: ' followed by one thing a reader would want to know that the text does not say.",
   "output": "The council approved the scheme on Tuesday, with three members voting against. Construction is expected to begin next year.\n\nNot stated: The cost of the scheme or how it will be funded.",
   "latency_ms": 1950,
   "cost": 0.001985,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, summarizing the text accurately in under 50 words and correctly identifying a relevant missing fact on a separate line as requested."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 5,
     "violates": true,
     "reasoning": "Accurate, concise summary and correct separate-line format. However, it gives two unstated items (“cost” and “how funded”) rather than one requested thing."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfect summary under 50 words, no added facts, correct separate line with a relevant missing detail."
    }
   ]
  },
  {
   "id": "su4",
   "name": "One-sentence gist",
   "prompt": "Reduce to ONE sentence of no more than 25 words: 'After eighteen months of testing across four hospitals, the trial found that the new triage system reduced average waiting times by 22 minutes, although staff reported it added roughly ten minutes of administrative work per shift and two sites abandoned it before the trial ended.'",
   "output": "An 18-month, four-hospital trial cut waiting times by 22 minutes but added ten minutes of admin per shift, and two sites quit early.",
   "latency_ms": 1804,
   "cost": 0.0018,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly condenses the original text into a single, clear sentence of 23 words, capturing all key facts while strictly adhering to the constraints."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 9,
     "violates": false,
     "reasoning": "One 23-word sentence accurately preserves duration, sites, waiting-time reduction, added workload, and early abandonment. It slightly omits that staff reported the administrative burden."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Exact one-sentence reduction under 25 words; fully accurate, clear, and complete capture of all key facts."
    }
   ]
  },
  {
   "id": "su5",
   "name": "Preserve the caveat",
   "prompt": "Summarise in under 60 words, and make sure the limitation survives: 'Early results suggest the drug reduces symptoms in about 60% of patients. However the sample was only 34 people, all under 40, and there was no control group, so the finding should be treated as preliminary.'",
   "output": "Early results suggest the drug reduces symptoms in about 60% of patients. However, with only 34 participants, all under 40, and no control group, these findings should be treated as preliminary.",
   "latency_ms": 1712,
   "cost": 0.001965,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly summarizes the text in 31 words (well under the 60-word limit) while accurately preserving all crucial limitations regarding sample size, demographics, and the lack of a control group."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately preserves the 60% result and all key limitations: small sample, age restriction, no control group, and preliminary status. It is clear, concise, and under 60 words."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Preserves all key facts and limitations accurately in 31 words. Minor rephrase is clear, concise, and fully follows the under-60-word constraint."
    }
   ]
  },
  {
   "id": "su6",
   "name": "Summarise a disagreement",
   "prompt": "In under 80 words, summarise the disagreement fairly, giving each side equal weight: 'Marketing wants to cut the price to win share, arguing volume will more than compensate. Finance says the last price cut in 2024 produced a 4% volume lift against an 11% margin loss, and would rather spend the same money on retention.'",
   "output": "Marketing favours cutting the price to gain market share, believing higher volume will outweigh the reduced margin. Finance disagrees, pointing to the 2024 price cut, which delivered only a 4% volume increase while costing 11% in margin. Instead, Finance would prefer to invest the equivalent sum in customer retention. The disagreement centres on whether price reduction or retention spending offers the better return.",
   "latency_ms": 3218,
   "cost": 0.00388,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response accurately and fairly summarizes both sides of the disagreement, includes all key details, and strictly adheres to the under 80 words constraint."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate, balanced summary giving both Marketing’s volume rationale and Finance’s evidence-based preference for retention. It is clear, concise, professional, and well under 80 words."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate fair summary under 80 words with equal weight; clear, concise, fully useful and instruction-compliant."
    }
   ]
  },
  {
   "id": "su7",
   "name": "Extract the decision",
   "prompt": "From this thread, state in one line WHAT was decided and WHO decided it. If no decision was reached, say so. Thread: 'A: shall we move the launch to October? B: I'd rather not, the trade show is in September. A: agreed, but we can't ship without the packaging. C: packaging lands 2 Sept, confirmed by the printer this morning. A: fine, September stands then.'",
   "output": "Decision: The launch stays in September (not moved to October), decided by A (with input from B and C).",
   "latency_ms": 1562,
   "cost": 0.001455,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows the instructions, stating clearly in one line what was decided and who decided it based on the provided thread."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately identifies that the launch remains in September and attributes the final decision to A. It is one line, concise, and appropriately notes B and C's contributing input."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfectly captures the decision and decider in one clear line; fully accurate and compliant."
    }
   ]
  },
  {
   "id": "su8",
   "name": "Long to short, no loss",
   "prompt": "Compress to under 40 words without losing any of the four numbers: 'The programme ran for 3 years, cost £2.1m, reached 14,000 participants, and reported a 19% improvement in the primary outcome measure compared with the comparison group.'",
   "output": "Over 3 years, the £2.1m programme reached 14,000 participants and reported a 19% improvement in the primary outcome versus the comparison group.",
   "latency_ms": 1857,
   "cost": 0.001705,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly compresses the text to 22 words (well under the 40-word limit) while retaining all four required numbers and the original meaning. It is clear, concise, and highly useful."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "22 words; retains all four numbers and their meanings accurately. Clear, concise, and suitable for a non-technical audience."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "All four numbers retained; 22 words under limit; meaning fully preserved; clear and concise."
    }
   ]
  },
  {
   "id": "su9",
   "name": "Summary for a specific reader",
   "prompt": "Summarise this for a finance director who cares only about cost and risk, in under 70 words: 'The migration will move 40 services to the new platform over 9 months. The team estimates 3 months of dual-running, during which both platforms are paid for. There is a penalty clause if we exit the old contract before June. Engineers expect a 30% reduction in incidents afterwards.'",
   "output": "**Cost:** Migrating 40 services over 9 months, including 3 months paying for both platforms simultaneously. Exiting the old contract before June triggers a penalty clause—timing matters to avoid this.\n\n**Risk:** Dual-running overlap increases short-term spend. However, engineers project a 30% drop in incidents post-migration, reducing operational risk and likely lowering long-term support costs.",
   "latency_ms": 3379,
   "cost": 0.00397,
   "task_score": 9,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly extracts the cost and risk elements, formats them clearly for a finance director, and stays well under the 70-word limit (54 words)."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 9,
     "violates": false,
     "reasoning": "Accurately captures migration duration, dual-running cost, early-exit penalty timing, and projected incident reduction. It is concise and finance-focused. “Likely lowering long-term support costs” is a reasonable but unquantified inference "
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate cost/risk focus, under 70 words, clear structure; minor polish possible but expert-level fit."
    }
   ]
  },
  {
   "id": "su10",
   "name": "Bullet the risks only",
   "prompt": "List ONLY the risks as bullets, maximum 5, no solutions, no preamble: 'The supplier is reliable but single-source. Demand is growing 20% a year. Our warehouse lease ends in 14 months. The finance system is unsupported after next April. Staff turnover is low. Payment terms with our largest customer are 90 days.'",
   "output": "- Single-source supplier dependency\n- Demand growth (20%/year) outpacing capacity\n- Warehouse lease expiring in 14 months\n- Finance system unsupported after next April\n- 90-day payment terms with largest customer straining cash flow",
   "latency_ms": 2039,
   "cost": 0.00269,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, listing exactly five risks as bullets with no preamble or solutions. The extracted risks accurately reflect the provided text."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Exactly five risk-only bullets, with no preamble or solutions. Accurately identifies the material supply, capacity, facility, system-support, and cash-flow risks."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurately lists only the 5 risks as bullets with no preamble or solutions; minor interpretive phrasing on cash flow is acceptable and useful."
    }
   ]
  },
  {
   "id": "su11",
   "name": "Headline and standfirst",
   "prompt": "Write a headline (max 9 words) and a one-sentence standfirst (max 30 words) for: 'A study of 1,200 UK small businesses found that those which adopted at least one AI tool in 2025 grew revenue 8% faster on average, though the researchers could not establish whether the tools caused the growth or successful firms simply adopt tools sooner.'",
   "output": "**Headline:** AI-Adopting Small Firms Grew Revenue 8% Faster\n\n**Standfirst:** A study of 1,200 UK small businesses links AI tool adoption to quicker growth, though researchers couldn't confirm whether the technology drove success or thriving firms simply adopt sooner.",
   "latency_ms": 2417,
   "cost": 0.003235,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly captures the provided information, strictly adheres to the word count constraints (7-word headline, 29-word standfirst), and is highly clear and useful."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, concise, and clearly preserves the study’s non-causal caveat. Both elements meet their word limits. Minor omission: the standfirst does not specify adoption occurred in 2025 or at least one tool."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Headline 7 words, standfirst 29 words; fully accurate, complete, clear and useful."
    }
   ]
  },
  {
   "id": "su12",
   "name": "Say when there is nothing to summarise",
   "prompt": "Summarise the key findings of this text in under 40 words: 'Thanks — noted. Will pick this up Monday.' If there are no findings to summarise, say so plainly instead of padding.",
   "output": "This text contains no findings to summarise. It's a brief acknowledgement message indicating the sender will address something on Monday.",
   "latency_ms": 1660,
   "cost": 0.001335,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response accurately identifies that there are no findings, states this plainly as instructed, and stays well under the 40-word limit."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately states there are no findings and briefly explains the message’s purpose. It follows the instruction to avoid padding and is well under 40 words."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Correctly notes no findings and stays under 40 words; minor extra description is helpful not padding."
    }
   ]
  }
 ]
}