{
 "entity": "gpt-5-6-luna",
 "entity_type": "model",
 "category": "Summarising",
 "suite": "suite-2026-08-tasks/summarising",
 "model": "openai/gpt-5.6-luna",
 "judges": [
  "anthropic/claude-sonnet-5",
  "google/gemini-3.1-pro-preview",
  "x-ai/grok-4.5"
 ],
 "judge_protocol": "judge-2026-08",
 "anchors": "solo-2026-08-a",
 "score": 97,
 "caps": 1,
 "cost_usd": 0.1244,
 "started_at": "2026-08-13T09:42:16.086Z",
 "finished_at": "2026-08-13T09:42:40.885Z",
 "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": "- Reconcile the March invoices — **unassigned**\n- Chase the supplier by Friday — **Tom**\n- Review pricing for the new CRM — **unassigned**\n- Update the cashflow for the board pack before the 20th, if the numbers are available — **Priya**",
   "latency_ms": 2088,
   "cost": 0.0001139,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, well-formatted action items with owners correctly assigned or marked unassigned; Sam's leave correctly omitted as non-action. Minor: could omit conditional caveat but still concise and useful."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly extracts all action items, accurately assigns owners (or 'unassigned'), formats them as a bulleted list, and includes no extraneous text, following all instructions flawlessly."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfect extraction of only true action items with correct owners; clean bulleted format meets all constraints 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 increased 12% to £1.4m, driven primarily by the new retail channel (£310k).\n- Margins fell from 41% to 37% due to higher shipping costs and warehouse relocation.\n- Headcount remained unchanged at 34.\n- Q4’s key risk is the supplier contract, expiring in November without renegotiation.\n- Cash at bank totals £620k.",
   "latency_ms": 3849,
   "cost": 0.000232,
   "task_score": 9.5,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, 5 bullets, all under 15 words, clear and concise, meets task requirements well."
    },
    {
     "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 captures all key financial and operational points in a highly readable format."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": null,
     "violates": null,
     "reasoning": "unparseable/failed"
    }
   ]
  },
  {
   "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. Three members voted against it, and construction is expected to begin next year.\n\nNot stated: What the scheme involves.",
   "latency_ms": 2289,
   "cost": 0.0000631,
   "task_score": 9,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise summary under 50 words, correctly identifies unstated info; format followed as instructed."
    },
    {
     "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, clear, and concise."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate rephrase under 50 words, no added facts; correct 'Not stated' line with relevant gap. Minor: barely condensed."
    }
   ]
  },
  {
   "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": "After 18 months across four hospitals, the triage system cut waits 22 minutes but added 10 minutes’ administrative work per shift; two sites abandoned it.",
   "latency_ms": 3477,
   "cost": 0.0001017,
   "task_score": 9,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise, one sentence, likely under 25 words (count ~26 close). Let's count: words ~26, slightly over limit possibly, minor risk."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly condenses the original text into exactly 25 words in a single sentence, capturing all key facts clearly and concisely."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Exact 25-word one-sentence summary; captures all key facts accurately and clearly with only minor omissions of nonessentials."
    }
   ]
  },
  {
   "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, but this preliminary finding is limited by a small sample of 34 people, all under 40, and the absence of a control group.",
   "latency_ms": 935,
   "cost": 0.000035,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, concise, under 60 words, preserves limitation clearly. Well done, minor stylistic nitpicks only."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly summarizes the text in under 60 words (35 words) while accurately retaining all the crucial limitations regarding sample size, age, and lack of a control group."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate condensation preserving all limitations and preliminary nature; 35 words; clear, useful, fully compliant."
    }
   ]
  },
  {
   "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 supports lowering the price to gain market share, arguing that increased sales volume will more than offset reduced unit margins. Finance is concerned that this assumption may not hold, citing the 2024 price cut, which delivered only a 4% volume increase alongside an 11% margin decline. It recommends directing the equivalent investment toward customer retention instead.",
   "latency_ms": 1602,
   "cost": 0.0000635,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, balanced, concise, under 80 words (58). Fair treatment of both sides, clear and useful summary."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly captures both sides of the disagreement with equal weight, includes all key details, and strictly adheres to the under 80 words constraint (58 words)."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate fair summary under 80 words with equal weight; fully meets all criteria flawlessly."
    }
   ]
  },
  {
   "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": "The launch will remain in September, decided by A (with C confirming packaging arrives 2 September).",
   "latency_ms": 1552,
   "cost": 0.000044,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise one-line summary of decision and decider, matches thread content closely."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response accurately identifies the decision and the decision-maker in a single line, perfectly following all instructions."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately captures decision and decider in one clear line; fully follows task; concise and useful."
    }
   ]
  },
  {
   "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 reported a 19% improvement in the primary outcome versus the comparison group.",
   "latency_ms": 1866,
   "cost": 0.0001015,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Retains all four numbers, accurate, concise, under 40 words, meets constraint well; minor stylistic tweak only."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly compresses the text to 21 words (well under the 40-word limit) while accurately retaining all four required numbers and the original meaning."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "All four numbers retained; 21 words <40; accurate compression; clear, concise, fully 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": "Migration of 40 services will take nine months, with an estimated three months of paying for both platforms. Exiting the current contract before June may incur penalties, creating timing risk. The main projected benefit is a 30% reduction in incidents after migration, but this is an estimate and should be validated against implementation costs and disruption risk.",
   "latency_ms": 2794,
   "cost": 0.000082,
   "task_score": 9,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise, focused on cost/risk, under 70 words, minor lack of explicit cost figures but captures key risks well."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 9,
     "violates": false,
     "reasoning": "Excellent summary tailored to the target audience, focusing clearly on cost and risk factors. It stays well under the 70-word limit and accurately reflects the provided text."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate cost/risk focus, under 70 words, clear and useful; minor extra caution phrasing only."
    }
   ]
  },
  {
   "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": "- Reliance on a single supplier creates supply disruption risk.\n- Rapid demand growth may exceed operational and inventory capacity.\n- Warehouse lease expiry in 14 months creates relocation or disruption risk.\n- The finance system becoming unsupported creates operational, security, and compliance risks.\n- 90-day payment terms with the largest customer create cash-flow and customer-concentration risks.",
   "latency_ms": 2761,
   "cost": 0.000088,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, concise, 5 bullets, no solutions or preamble, correctly identifies risks including omitting low turnover which isn't a risk."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, extracting exactly 5 risks as bullets with no preamble or solutions. It accurately reflects the provided text in a clear, concise manner."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfectly lists exactly 5 risks as bullets with no preamble or solutions, matching all constraints and content accurately."
    }
   ]
  },
  {
   "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-using small businesses grew revenue 8% faster in 2025\n\n**Standfirst:** A study of 1,200 UK firms found faster growth among AI adopters, but could not show whether AI drove gains or successful businesses adopted it sooner.",
   "latency_ms": 3707,
   "cost": 0.0001458,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 5,
     "violates": true,
     "reasoning": "Headline is 10 words, exceeding the 9-word limit; standfirst is fine and accurate. Otherwise clear and useful."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions. The headline is exactly 9 words, and the standfirst is a single sentence of 26 words. Both accurately and concisely capture the provided information."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Exact word limits met; fully accurate, clear, concise summary matching source facts."
    }
   ]
  },
  {
   "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": "No findings to summarise; the message simply acknowledges receipt and says the matter will be addressed on Monday.",
   "latency_ms": 742,
   "cost": 0.0000198,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Correctly identifies no findings, concise, under 40 words, follows instructions well."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, accurately identifying that there are no findings and stating so plainly in well under the 40-word limit."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Correctly identifies no findings; plain statement under 40 words; fully follows instructions; clear and useful."
    }
   ]
  }
 ]
}