{
 "entity": "gpt-5-6-terra",
 "entity_type": "model",
 "category": "Summarising",
 "suite": "suite-2026-08-tasks/summarising",
 "model": "openai/gpt-5.6-terra",
 "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": 96,
 "caps": 0,
 "cost_usd": 0.125,
 "started_at": "2026-08-13T09:43:06.579Z",
 "finished_at": "2026-08-13T09:43:27.515Z",
 "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": "- Tom — chase the supplier by Friday.\n- unassigned — review new CRM pricing.\n- Priya — update the cashflow for the board pack before the 20th, pending receipt of the numbers.",
   "latency_ms": 1686,
   "cost": 0.000383,
   "task_score": 9,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, well-formatted action items with owners; minor omission of March invoice reconciliation as a possible action item."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly extracts the action items, correctly assigns the owners (including 'unassigned' where appropriate), and formats them as a concise bulleted list exactly as requested."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurately extracts only true action items with owners in required bullet format; minor inference on CRM phrasing is reasonable and clear."
    }
   ]
  },
  {
   "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 rose 12% to £1.4m, driven by £310k from retail.\n- Margins fell from 41% to 37% due to shipping and warehouse move costs.\n- Headcount remained flat at 34 employees.\n- Key Q4 risk: supplier contract expires in November without renegotiation.\n- Cash at bank stood at £620k.",
   "latency_ms": 1421,
   "cost": 0.000616,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, concise, exactly 5 bullets, all under 15 words, covers key facts clearly and readable quickly."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions. It provides exactly 5 bullets, each well under the 15-word limit, accurately capturing the key financial and operational metrics in a highly readable format."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Exact 5 bullets, each ≤15 words, fully accurate summary, clear and concise for quick read."
    }
   ]
  },
  {
   "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 nature of the scheme.",
   "latency_ms": 1102,
   "cost": 0.000289,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise summary under 50 words, follows format with 'Not stated' line, reasonable missing fact identified."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, including the word count constraint, the exact phrasing required, and accurately identifying a missing detail without adding outside facts."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Perfect summary under 50 words, no added facts, correct separate line format 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": "Across four hospitals, an 18-month trial cut waits by 22 minutes but added ten administrative minutes per shift; two sites abandoned it.",
   "latency_ms": 3107,
   "cost": 0.000843,
   "task_score": 8,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, single sentence, 22 words, captures all key facts concisely."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 6,
     "violates": false,
     "reasoning": "Meets length constraint (22 words) and is one sentence. However, it omits the core subject ('the new triage system'), making it unclear what was actually being tested and abandoned."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate one-sentence reduction under 25 words capturing all key facts with only minor omissions of qualifiers."
    }
   ]
  },
  {
   "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 reduced symptoms in about 60% of 34 patients. However, because all participants were under 40 and there was no control group, the finding is preliminary and may not generalize.",
   "latency_ms": 1620,
   "cost": 0.00035,
   "task_score": 9,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise, preserves limitation, under 60 words (32 words). Minor stylistic tweak but no factual errors."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly summarizes the text in 34 words (well under the 60-word limit) while successfully retaining all the crucial limitations regarding sample size, age, and lack of a control group."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Preserves all key facts and limitations accurately in 34 words; minor tense shift and slight rephrase do not harm fidelity or clarity."
    }
   ]
  },
  {
   "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 advocates a price cut to gain market share, believing higher sales volume will offset lower margins. Finance points to 2024 results, when a price cut increased volume by 4% but reduced margin by 11%, and argues the budget would deliver better returns through customer-retention initiatives.",
   "latency_ms": 1954,
   "cost": 0.000449,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate, balanced, concise summary under 80 words, captures both sides fairly."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly summarizes the disagreement, giving equal weight to both sides in a clear, concise manner well under the 80-word limit."
    },
    {
     "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.",
   "latency_ms": 1296,
   "cost": 0.000182,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 7,
     "violates": false,
     "reasoning": "Accurate summary; A confirmed decision though B's input contributed. Concise, meets one-line requirement, minor nuance omitted (collective agreement)."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, accurately identifying the decision and the decision-maker in a single, concise line."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Correctly identifies the September launch decision by A in one clear line; fully matches task."
    }
   ]
  },
  {
   "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, £2.1m programme reached 14,000 participants and reported a 19% improvement in the primary outcome measure versus the comparison group.",
   "latency_ms": 1062,
   "cost": 0.000289,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "All four numbers retained, under 40 words (21), clear and concise, accurate compression."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response successfully compresses the sentence to 21 words (well under the 40-word limit) while retaining all four required numbers. It is clear, concise, and accurate."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "All four numbers retained; 21 words; meaning fully preserved; clear and concise compression."
    }
   ]
  },
  {
   "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 over 9 months requires 3 months of dual platform costs. Exiting the old contract before June triggers a penalty, so timing should minimise this exposure. Post-migration, engineers forecast a 30% incident reduction, lowering operational and outage risk.",
   "latency_ms": 1554,
   "cost": 0.000442,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 8,
     "violates": false,
     "reasoning": "Accurate, concise, focused on cost/risk, under 70 words (about 40). Minor omission: doesn't explicitly note dual-running cost implications beyond mention."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "Perfectly tailored to the FD, highlighting only cost (dual-running, penalties) and risk (incident reduction). Well under the 70-word limit."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurate cost/risk focus, under 70 words, clear and complete 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  \n- Capacity strain from 20% annual demand growth  \n- Warehouse lease expiry in 14 months  \n- Unsupported finance system after next April  \n- Cash-flow exposure from 90-day customer payment terms",
   "latency_ms": 1502,
   "cost": 0.00037,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 10,
     "violates": false,
     "reasoning": "Accurately extracts exactly 5 true risks, no solutions or preamble, correctly omits non-risks (reliable supplier, low turnover), clear and concise."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows all instructions, extracting exactly five risks as bullet points with no preamble or solutions, and accurately reflects the provided text."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Exact match to constraints: 5 risk-only bullets, no preamble/solutions. All key risks correctly extracted and phrased clearly."
    }
   ]
  },
  {
   "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 Firms Report Faster Revenue Growth**\n\nUK small businesses using AI tools grew revenue 8% faster on average, though the study cannot prove AI caused the difference.",
   "latency_ms": 1367,
   "cost": 0.00033,
   "task_score": 9,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Headline and standfirst meet word limits, accurately reflect the study's findings and caveat, clear and concise."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly captures the core message, adheres strictly to the word count and sentence constraints, and is highly clear and useful for a non-technical professional."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 9,
     "violates": false,
     "reasoning": "Accurate summary with caveat; headline 7 words, standfirst 21 words; clear, useful, fully compliant."
    }
   ]
  },
  {
   "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 key findings to summarise.",
   "latency_ms": 1333,
   "cost": 0.000114,
   "task_score": 10,
   "judges": [
    {
     "judge": "anthropic/claude-sonnet-5",
     "score": 9,
     "violates": false,
     "reasoning": "Correctly identifies no findings exist, plain and concise, follows instructions exactly, appropriate for non-technical audience."
    },
    {
     "judge": "google/gemini-3.1-pro-preview",
     "score": 10,
     "violates": false,
     "reasoning": "The response perfectly follows the instructions by plainly stating there are no findings to summarize, and it stays well under the 40-word limit."
    },
    {
     "judge": "x-ai/grok-4.5",
     "score": 10,
     "violates": false,
     "reasoning": "Correctly identifies no findings; follows under-40-word and plain-statement rules exactly; clear, concise, useful."
    }
   ]
  }
 ]
}