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Claude Opus 5.5 (effort default (no --effort flag) · thinking on) on Extract term, renewal, notice, liability cap and governing law from service contracts with amendments

AClaude Opus 5.5default · thinking on · Claude Code 2.1.299 (headless -p) · cloud · 2026-10-20 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first try
Estimated cost
$0.13
Wall time
18s
Human step-ins
0
Outcome
Pass

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Summary

Exact prompt

# Extract key terms from a stack of service contracts Input: `contracts/` holds 5-8 plain-text service agreements (synthetic). Some end with one or more amendments. For each contract extract: - term_months: the initial term in months (a term stated in years counts 12 months per year). - auto_renew: true if the agreement renews automatically unless notice is given, false otherwise. - notice_days: days of notice needed to terminate or prevent renewal. - liability_cap_usd: the liability cap in US dollars. When the cap is defined by fees (for example "fees paid in the twelve (12) months preceding the claim"), compute it as monthly_fee_usd x that number of months. - governing_law: the state named in the governing-law clause, as written (e.g. "Delaware"). - Amendments at the end of a contract override the original clause they amend; apply them in order. - Numbers may be written in words, in digits, or both (e.g. "sixty (60) days"). Write `out/contracts.json`: `{"<contract file name without .txt>": {"term_months": <int>, "auto_renew": <bool>, "notice_days": <int>, "liability_cap_usd": <number>, "governing_law": "<state>"}, ...}`. ## How this run works - Work on your own: nobody will answer questions in this task, and writing to `ask/` counts against the run. - Write only under `out/`. Create `out/` if it is missing. Inputs are synthetic; don't fetch anything from the network. - Scoring is partial credit: each listed check is pass/fail, and the score is the share passed. Numbers are compared to within 0.005 unless the task says otherwise.

Read 5-8 synthetic service agreements and extract five commercial terms from each. Numbers appear as words, digits or both, some liability caps are defined as a number of months of fees, and signed amendments at the end override earlier clauses. Distractors include other day counts, percentages and a second state named in the notices clause. Original benchmark task written for usecaserank.com (not based on a specific public post). Headless, offline run on a reproducible fixture. Each run's notes say how its cost was measured (estimates are marked).

Success criteria: term_months auto_renew notice_days liability_cap governing_law amendments_applied every_contract_complete

Setup notes: Batch 16 case r04-contract-clauses (offline, synthetic inputs, seed 2318811925). Autonomous case: no stand-in user and no step-ins expected; any file the solver wrote to ask/ is counted as a measured intervention (0) and blocks a pass. Prompt = TASK.md verbatim. Hidden key kept outside the solver's work dir. Scored with the case's scorer (python3 score.py WORKDIR KEYDIR, absolute paths); pass = every check true and no ask/ files. Tools: Read/Write/Edit/Glob/Grep/Bash, web disabled. Single run, no retries. 1-min load average at scoring 0.39 (8 cores). Claude Code's own reported cost for claude-opus-5.5: $0.1261. Score: 7/7. Cost is an ESTIMATE: measured tokens x pricing.json list price (Claude Pro subscription, nothing billed); input_tokens include cache reads and writes. Single run.

Estimated cost List-price estimate; not actually billed.

Metrics

Estimated cost
$0.13
Wall time
18s
Human step-ins
0
Turns
3
Model usage
ModelInput tokOutput tokCost
AClaude Opus 5.5anthropic/claude-opus-5.5effort default (no --effort flag) · thinking on61,9491,681$0.13

Reproduce this run

  1. Use the use case prompt on the use case page.
  2. Same setup: Claude Opus 5.5 (anthropic/claude-opus-5.5, effort default (no --effort flag) · thinking on) via Claude Code 2.1.299 (headless -p), cloud.
  3. It counts as a success only if it meets every success criterion: term_months auto_renew notice_days liability_cap governing_law amendments_applied every_contract_complete
  4. Log model, tokens, wall time, human step-ins and the evidence log, then submit it as a reproduction. A different model? Submit a head-to-head rerun.

How runs are scored: Methodology.

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Automated checks

Trust 80% comes from these checks (how Trust % works).

Evidence log
[
 {
  "duration_api_ms": 17491,
  "stop_reason": "end_turn",
  "session_id": "[REDACTED]",
  "total_cost_usd": 0.1260996,
  "usage": {
   "input_tokens": 6,
   "cache_creation_input_tokens": 10265,
   "cache_read_input_tokens": 51678,
   "output_tokens": 1681,
   "output_tokens_details": {
    "thinking_tokens": 215
   },
   "server_tool_use": {
    "web_search_requests": 0,
    "web_fetch_requests": 0
   },
   "service_tier": "standard",
   "cache_creation": {
    "ephemeral_1h_input_tokens": 10265,
    "ephemeral_5m_input_tokens": 0
   },
   "inference_geo": "global",
   "iterations": [
    {
     "input_tokens": 2,
     "output_tokens": 690,
     "cache_read_input_tokens": 21537,
     "cache_creation_input_tokens": 874,
     "cache_creation": {
      "ephemeral_5m_input_tokens": 0,
      "ephemeral_1h_input_tokens": 874
     },
     "type": "message"
    }
   ],
   "speed": "standard",
   "fallback_credit": null
  },
  "modelUsage": {
   "claude-opus-5-5": {
    "inputTokens": 6,
    "outputTokens": 1681,
    "cacheReadInputTokens": 51678,
    "cacheCreationInputTokens": 10265,
    "webSearchRequests": 0,
    "costUSD": 0.1260996,
    "contextWindow": 1000000,
    "maxOutputTokens": 128000,
    "thinkingTokens": 215,
    "canonicalModel": "claude-opus-5-5",
    "provider": "firstParty",
    "costBasis": "list"
   }
  },
  "permission_denials": [],
  "terminal_reason": "completed",
  "fast_mode_state": "off",
  "fast_mode_disabled_reason": "sdk_opt_in_required",
  "subagent_stats": {
   "spawned": 0,
   "requested": {
    "background": 0,
    "foreground": 0,
    "unset": 0
   },
   "started_in_background": 0,
   "max_depth": 0,
   "spawned_by_subagents": 0,
   "completed": 0,
   "failed": 0,
   "killed": {
    "parent": 0,
    "user": 0,
    "system": 0
   },
   "refused": {
    "depth_limit": 0,
    "concurrency_limit": 0,
    "budget": 0
   },
   "by_type": {}
  },
  "safety_stops": 0,
  "is_error": false,
  "num_turns": 3,
  "subtype": "success",
  "api_error_status": null,
  "result": "I read all 7 contracts and wrote the terms to `out/contracts.json`. I checked that the file parses as JSON and has all 7 entries. I filled in the values by reading each contract myself, not with a parsing script.\n\n| Contract | Term (months) | Auto-renew | Notice (days) | Liability cap (USD) | Governing law |\n|---|---|---|---|---|---|\n| MSA-3541-A | 18 | false | 15 | 24,000.00 | Illinois |\n| MSA-5219-D | 36 | true | 15 | 12,500.00 | Colorado |\n| MSA-6303-C | 24 | true | 45 | 250,000 | California |\n| MSA-7791-B | 18 | false | 60 | 37,500.75 | Colorado |\n| MSA-9062-F | 36 | true | 30 | 50,000 | Washington |\n| MSA-9252-E | 12 | true | 30 | 100,000 | New York |\n| MSA-9368-G | 24 | false | 90 | 50,000 | Delaware |\n\nHow amendments and fee-based caps were handled:\n- **MSA-3541-A:** The amendment turns off auto-renewal. It says nothing about the notice period, so I kept the original 15 days. That's a judgement call: with no renewal left, you could argue the notice field no longer applies.\n- **MSA-5219-D:** Two amendments change the term: first to 12 months, then to thirty-six. Applying them in order gives 36.\n- **MSA-9062-F and MSA-9368-G:** Amendments change the governing law to Washington and Delaware.\n- **Fee-based caps:** MSA-3541-A is $8,000 \u00d7 3 months. MSA-5219-D is $12,500 \u00d7 1 month. MSA-7791-B is $12,500.25 \u00d7 3 months.\n- **Year-based terms:** \"Three years\" became 36 months and \"one year\" became 12.\n- **No auto-renewal (MSA-7791-B and MSA-9368-G):** The notice period is the one for terminating for convenience.",
  "ttft_ms": 3969,
  "type": "result",
  "duration_ms": 17857,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 2282,
  "time_to_request_ms": 254,
  "first_content_frame_ms": 2282,
  "queued_turn_count": 0,
  "result_index": 0
 }
]

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