{
 "entity": "claude-opus-4-6",
 "entity_type": "model",
 "category": "Summarising",
 "suite": "suite-2026-08-tasks/summarising",
 "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": 93,
 "caps": 1,
 "cost_usd": 0.1467,
 "started_at": "2026-08-13T09:36:46.869Z",
 "finished_at": "2026-08-13T09:37:16.791Z",
 "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 on March invoices by Friday — **Tom**\n• Get pricing for the new CRM — **unassigned**\n• Update the cashflow for the board pack before the 20th — **Priya** (contingent on having the numbers)",
   "latency_ms": 2451,
   "cost": 0.002115,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly extracts the action items and their owners, correctly identifies the unassigned task, and formats them as a bulleted list exactly as requested."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately extracts the three implied action items, assigns stated owners, marks CRM pricing unassigned, and preserves Priya’s dependency. It excludes non-actions and uses a clear bulleted format."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurately extracts the three action items with owners; minor interpretive link of invoices to chase is reasonable and helpful. Follows format exactly."
    }
   ]
  },
  {
   "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, new retail channel contributing £310k**\n• **Margins fell from 41% to 37% due to shipping costs and warehouse move**\n• **Headcount remained stable at 34 employees**\n• **Key Q4 risk: supplier contract expires November, renegotiation outstanding**\n• **Cash at bank stands at £620k**",
   "latency_ms": 3707,
   "cost": 0.003045,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, including the exact bullet count and word limit per bullet. It accurately and concisely captures all key points from the text."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 9,
     "violates": false,
     "reasoning": "Exactly five concise bullets, all within 15 words. Accurately covers revenue, margins, headcount, Q4 risk, and cash; only minor nuance omitted: retail was the main driver and warehouse costs were one-off."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Exact 5 bullets, each ≤15 words, fully accurate summary, clear and scannable."
    }
   ]
  },
  {
   "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 opposing. Construction is anticipated to start next year.\n\nNot stated: The total number of council members who voted (making it unclear whether the opposition was significant).",
   "latency_ms": 2144,
   "cost": 0.001565,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, including the word count constraint and the specific formatting for the 'Not stated' line. It is accurate, concise, and highly useful."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately summarises all stated facts in under 50 words and provides a separate “Not stated” line with one relevant missing detail. Clear, concise, and fully compliant."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Flawless summary under 50 words, no added facts, correct separate line with valid missing info."
    }
   ]
  },
  {
   "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 showed the new triage system cut wait times by 22 minutes despite adding administrative burden and two site withdrawals.",
   "latency_ms": 3774,
   "cost": 0.001295,
   "task_score": 9,
   "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 exactly 23 words, capturing all key facts while strictly adhering to the length constraint."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 8,
     "violates": false,
     "reasoning": "Meets the one-sentence, 25-word limit (23 words) and accurately captures the main outcome, burden, and withdrawals. It omits the specific ten-minutes-per-shift administrative increase."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate one-sentence condensation under 25 words; captures all key facts clearly and usefully with only minor detail loss."
    }
   ]
  },
  {
   "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": "The drug appeared to reduce symptoms in around 60% of patients in early testing. However, the study was limited by a very small sample size (34 participants), a lack of demographic diversity (all under 40), and the absence of a control group, so findings should be considered preliminary.",
   "latency_ms": 2536,
   "cost": 0.00194,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 8,
     "violates": false,
     "reasoning": "The response meets the word count constraint and includes all limitations. However, it is actually longer than the original text (48 words vs 36 words), making it a paraphrase rather than a true summary."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately preserves the 60% result and all key limitations: 34 participants, all under 40, no control group, and preliminary interpretation. It is clear, concise, and under 60 words."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate summary under 60 words; all limitations preserved clearly and concisely for non-experts."
    }
   ]
  },
  {
   "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** argues a price cut will drive enough volume growth to offset lower margins, accelerating market-share gains that strengthen the brand's long-term competitive position.\n\n**Finance** counters with evidence: the 2024 price cut delivered only a 4% volume increase while eroding margins by 11%, making it a net negative. They propose redirecting equivalent spend toward retention, which preserves margins while protecting existing revenue—a more capital-efficient path to growth.\n\nBoth sides prioritise growth but disagree on the most efficient lever.",
   "latency_ms": 4711,
   "cost": 0.00334,
   "task_score": 6,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 6,
     "violates": false,
     "reasoning": "The response meets the word count constraint (79 words). However, it embellishes the original text by adding unstated arguments (e.g., 'long-term competitive position', 'capital-efficient path'), which detracts from being a strict summary. "
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 6,
     "violates": false,
     "reasoning": "It is under 80 words and accurately states the core positions. However, Finance receives more detail and evaluative language (“net negative,” “preserves margins”) goes beyond the supplied evidence, weakening the requested equal-weight, neut"
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate fair summary under 80 words with equal weight; minor polish only, fully meets all criteria."
    }
   ]
  },
  {
   "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 product launch will remain in September as originally planned. **Decided by:** A (proposed the change, then confirmed September), with input from B and C (who provided the key packaging confirmation).",
   "latency_ms": 3037,
   "cost": 0.00164,
   "task_score": 8,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 8,
     "violates": false,
     "reasoning": "Accurately captures the decision and the decision-maker in a single line. Slightly verbose in explaining the roles of B and C, but perfectly meets the core requirements."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 9,
     "violates": false,
     "reasoning": "Correctly identifies that September was retained and that A confirmed the decision. B and C influenced it but did not explicitly decide. Slightly more detail than necessary, but still clear and effectively one line."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 5,
     "violates": true,
     "reasoning": "Correctly identifies September decision by A with input, but not one line as required; extra formatting and detail."
    }
   ]
  },
  {
   "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": "\"The 3-year programme cost £2.1m, reached 14,000 participants, and achieved a 19% improvement in the primary outcome versus the comparison group.\"\n\n(22 words)",
   "latency_ms": 2213,
   "cost": 0.00151,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response successfully compresses the text to 21 words while retaining all four required numbers and the original meaning. It is clear, concise, and follows all instructions perfectly."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 8,
     "violates": false,
     "reasoning": "It preserves all four numbers and is under 40 words. The wording is clear and concise. Minor issue: “achieved” is stronger than the original “reported,” which may overstate certainty."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Keeps all four numbers, under 40 words, fully accurate compression, clear and useful."
    }
   ]
  },
  {
   "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": "**Platform Migration: Cost & Risk Summary**\n\nYou'll carry **double platform costs for ~3 months** during dual-running. An early-exit penalty applies if the old contract ends **before June**—timing the cutover is critical. Across 9 months, 40 services will migrate. The payoff: a projected **30% drop in incidents post-migration**, reducing operational cost and downtime risk. Recommend aligning the migration schedule to avoid triggering the penalty clause.",
   "latency_ms": 4792,
   "cost": 0.003155,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly targets the finance director by highlighting double costs, penalty risks, and operational savings. It is highly concise, well-formatted, and strictly adheres to the under 70-word constraint (65 words)."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately highlights dual-running costs, early-exit penalty risk, timing implications, and expected incident reduction. It stays under 70 words and is concise, finance-focused, and actionable."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate cost/risk focus, under 70 words, clear and useful for finance director."
    }
   ]
  },
  {
   "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 with no alternative supply chain\n- Rapid 20% annual demand growth potentially outpacing operational capacity\n- Warehouse lease expiring in 14 months with no confirmed renewal or replacement\n- Finance system losing support after next April, risking operational and compliance failures\n- 90-day payment terms with largest customer straining cash flow",
   "latency_ms": 3197,
   "cost": 0.00241,
   "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 risks are accurately extracted and clearly articulated."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 8,
     "violates": false,
     "reasoning": "Exactly five risk-only bullets with no preamble or solutions. It accurately identifies the key risks. Minor overstatements include assuming no alternative supply chain and no confirmed warehouse renewal/replacement, which were not explicitl"
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfectly lists only the 5 risks as bullets with no preamble or solutions; ignores non-risk; fully accurate and concise."
    }
   ]
  },
  {
   "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": "**AI-Adopting Small Businesses Grow Revenue Faster, Study Finds**\n\nA UK study of 1,200 small businesses links AI adoption to 8% faster revenue growth, though researchers caution correlation does not prove causation.",
   "latency_ms": 2192,
   "cost": 0.00186,
   "task_score": 9,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, including word counts and sentence limits. It accurately captures the provided information in a clear, concise, and highly useful manner for a non-technical professional."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise, and within both word limits. It clearly conveys the 8% association and causation caveat, though it omits the 2025 timing and “at least one tool” detail."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, meets word limits exactly, clear and useful summary of key findings and caveat."
    }
   ]
  },
  {
   "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": "There are no key findings to summarise. The text is a brief administrative message acknowledging receipt of something and indicating it will be addressed on Monday.",
   "latency_ms": 2293,
   "cost": 0.001085,
   "task_score": 10,
   "judges": [
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response correctly identifies that there are no findings to summarize, states this plainly, and stays well under the 40-word limit."
    },
    {
     "judge": "openai/gpt-5.6-terra",
     "score": 10,
     "violates": false,
     "reasoning": "Plainly states there are no findings, as required, while accurately noting the message’s administrative content. It is concise, clear, and under 40 words."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 8,
     "violates": false,
     "reasoning": "Correctly notes no findings and stays under 40 words. Minor padding beyond 'say so plainly' slightly reduces perfection."
    }
   ]
  }
 ]
}