Crucible 2: Hard · Hard The Weekend Planner (Hard v3) · variant 862318672 · attempt 3
Mistral Large 4
FAIL Verified replay Rules 0.5 · Hard v3.1 · Recorded 2026-10-24 · provider Mistral
Mistral Large 4 failed The Weekend Planner (Hard v3): booked a hotel that can't be cancelled for free 48 hours before check-in.
41 tool calls, 0 failed, 9 turns.
yellow card. Cost $0.24, model time 389.2 s.
Replay
- BellPlan a long weekend for Priya, Ines, Elio and Theo (4 travellers): from Oakhaven to Thornbury, on to Ashby Cross, then Kestrel Bay, and back home. Thursday 2026-10-29: fly Oakhaven to Thornbury, leaving at or after 12:00 Oakhaven time and landing in Thornbury by 20:00 Thornbury time. Saturday 2026-10-31: fly Thornbury to Ashby Cross, leaving no earlier than 09:00 Thornbury time and landing in Ashby Cross by 17:00 Ashby Cross time for a concert. Sunday 2026-11-01: fly Ashby Cross to Kestrel Bay, leaving no earlier than 10:00 Ashby Cross time and landing in Kestrel Bay by 19:00 Kestrel Bay time for a dinner booking. Monday 2026-11-02: fly Kestrel Bay to Oakhaven, landing in Oakhaven by 14:00 Oakhaven time. Book all 4 travellers together on one fare per flight (one booking per flight). Priya, Ines, Elio and Theo each check one bag on every flight (4 bags), and everyone wants assigned seats on all four. Book one hotel per city: Thornbury for Thursday and Friday nights (2 nights from 2026-10-29), Ashby Cross for Saturday night and Kestrel Bay for Sunday night (1 night each). Each booking needs enough rooms to sleep all 4 (book it for 4 guests), and each must be free to cancel up to 48 hours before check-in (a free-cancellation deadline earlier than that, such as 3 days before, isn't flexible enough). The budget is $4185.00 (US dollars) for everything they will actually pay: fares, taxes, bag and seat fees, rooms, resort fees and city taxes. Book it all, then add the trip to their shared calendar.
- Turn 1I'll plan this trip step by step. First, let me get time zone info for all cities and search all four flights.
- get_city_info{"city":"Oakhaven"}
- get_city_info ✓{"city":"Oakhaven","utc_offset":"UTC-03:00","clock_changes":"Clocks went back 1 hour on Sunday 25 Oct 2026 (from UTC-02:00 to UTC-03:00).","airport":"Oakhaven …
- get_city_info{"city":"Thornbury"}
- get_city_info ✓{"city":"Thornbury","utc_offset":"UTC-05:00","clock_changes":"Clocks went back 1 hour on Sunday 25 Oct 2026 (from UTC-04:00 to UTC-05:00).","airport":"Thornbur…
- get_city_info{"city":"Ashby Cross"}
- get_city_info ✓{"city":"Ashby Cross","utc_offset":"UTC-04:00","clock_changes":"Clocks went back 1 hour on Sunday 25 Oct 2026 (from UTC-03:00 to UTC-04:00).","airport":"Ashby …
- get_city_info{"city":"Kestrel Bay"}
- get_city_info ✓{"city":"Kestrel Bay","utc_offset":"UTC-06:00","clock_changes":"Clocks go back 1 hour at 02:00 local time on Sunday 1 Nov 2026: from then on UTC-07:00.","airpo…
- search_flights{"date":"2026-10-29","from":"Oakhaven","to":"Thornbury"}
- search_flights ✓{"note":"All times (depart and arrive) are local time at the departure airport, Oakhaven. Base fares are per person in US dollars before taxes and fees; bag an…
- search_flights{"date":"2026-10-31","from":"Thornbury","to":"Ashby Cross"}
- search_flights ✓{"note":"All times (depart and arrive) are local time at the departure airport, Thornbury. Base fares are per person in US dollars before taxes and fees; bag a…
- search_flights{"date":"2026-11-01","from":"Ashby Cross","to":"Kestrel Bay"}
- search_flights ✓{"note":"All times (depart and arrive) are local time at the departure airport, Ashby Cross. Base fares are per person in US dollars before taxes and fees; bag…
- search_flights{"date":"2026-11-02","from":"Kestrel Bay","to":"Oakhaven"}
- search_flights ✓{"note":"All times (depart and arrive) are local time at the departure airport, Kestrel Bay. Base fares are per person in US dollars before taxes and fees; bag…
- Turn 2I have the flight options. Now let me analyze the time constraints and get fare rules plus hotel options. **Time zone analysis:** - Oakhaven UTC-3, Thornbury UTC-5 (2h behind), Ashby Cross UTC-4 (1h ahead of Thornbury), Kestrel Bay UTC-7 …
- get_fare_rules{"fare_ids":["SK406-K","AV798-Q","LM753-Q","LM718-V","AV380-V"]}
- get_fare_rules ✓[{"fare_id":"AV798-Q","flight_id":"AV798","fare_name":"Saver","base_fare_per_person":62.59,"taxes_per_person":38.79,"checked_bag":"Not allowed on this fare (ca…
- get_fare_rules{"fare_ids":["SK809-K"]}
- get_fare_rules ✓[{"fare_id":"SK809-K","flight_id":"SK809","fare_name":"Light","base_fare_per_person":62.47,"taxes_per_person":45.21,"checked_bag":"Not allowed on this fare (ca…
- search_hotels{"city":"Thornbury"}
- search_hotels ✓{"note":"Room rates per room per night, before resort fees and taxes. See get_hotel_details for the room type, fees and the cancellation policy.","hotels":[{"h…
- search_hotels{"city":"Ashby Cross"}
- search_hotels ✓{"note":"Room rates per room per night, before resort fees and taxes. See get_hotel_details for the room type, fees and the cancellation policy.","hotels":[{"h…
- search_hotels{"city":"Kestrel Bay"}
- search_hotels ✓{"note":"Room rates per room per night, before resort fees and taxes. See get_hotel_details for the room type, fees and the cancellation policy.","hotels":[{"h…
- Turn 3The cheapest fares don't allow checked bags, so I need fare rules for the other candidate fares. Let me fetch them:
- get_fare_rules{"fare_ids":["SK737-V","SK737-Y","AV605-M","AV605-T","LM310-M"]}
- get_fare_rules ✓[{"fare_id":"SK737-V","flight_id":"SK737","fare_name":"Classic","base_fare_per_person":120.68,"taxes_per_person":38.79,"checked_bag":"$39.28 per bag","assigned…
- get_fare_rules{"fare_ids":["LM310-T","SK193-K","SK406-V","AV185-M","AV913-K"]}
- get_fare_rules ✓[{"fare_id":"LM310-T","flight_id":"LM310","fare_name":"Main Plus","base_fare_per_person":240.22,"taxes_per_person":38.79,"checked_bag":"1 per passenger include…
- get_fare_rules{"fare_ids":["AV913-V","LM712-T","LM712-Q","SK171-T","SK171-V"]}
- get_fare_rules ✓[{"fare_id":"AV913-V","flight_id":"AV913","fare_name":"Plus","base_fare_per_person":252.18,"taxes_per_person":35.4,"checked_bag":"1 per passenger included","as…
- get_fare_rules{"fare_ids":["AV851-M","SK364-Y","SK364-Q","AV688-T","AV688-M"]}
- get_fare_rules ✓[{"fare_id":"AV851-M","flight_id":"AV851","fare_name":"Saver","base_fare_per_person":65.88,"taxes_per_person":45.98,"checked_bag":"Not allowed on this fare (ca…
- get_fare_rules{"fare_ids":["AV380-M","LM332-M","LM332-V","LM718-Y","AV345-M"]}
- get_fare_rules ✓[{"fare_id":"AV380-M","flight_id":"AV380","fare_name":"Standard","base_fare_per_person":89.25,"taxes_per_person":45.98,"checked_bag":"$42.71 per bag","assigned…
- get_fare_rules{"fare_ids":["SK878-M","SK878-Y","LM886-Q","LM886-V","LM953-Q"]}
- get_fare_rules ✓[{"fare_id":"SK878-M","flight_id":"SK878","fare_name":"Classic","base_fare_per_person":215.37,"taxes_per_person":45.21,"checked_bag":"$37.70 per bag","assigned…
- get_fare_rules{"fare_ids":["LM953-K","LM722-M","LM722-T","AV506-M","AV506-Q"]}
- get_fare_rules ✓[{"fare_id":"LM953-K","flight_id":"LM953","fare_name":"Main Plus","base_fare_per_person":236.37,"taxes_per_person":45.21,"checked_bag":"1 per passenger include…
- Turn 4I've calculated the cheapest flight options with baggage and seat selection for each leg, totaling $3,168.00. Now I'll check hotel details and the VKR exchange rate to stay within the $1,017.00 remaining budget.
- get_hotel_details{"hotel_ids":["H5","H4","H3","H6","H7"]}
- get_hotel_details ✓[{"hotel_id":"H3","name":"The Grand Meridian","city":"Thornbury","room":"Family room (sleeps 4)","max_guests_per_room":4,"currency":"USD","room_rate_per_night"…
- get_hotel_details{"hotel_ids":["H12","H11","H10","H9","H13"]}
- get_hotel_details ✓[{"hotel_id":"H9","name":"The Wren Hotel","city":"Ashby Cross","room":"Family room (sleeps 4)","max_guests_per_room":4,"currency":"USD","room_rate_per_night":2…
- get_hotel_details{"hotel_ids":["H16","H17","H14","H19","H20"]}
- get_hotel_details ✓[{"hotel_id":"H14","name":"Seaglass Resort & Spa","city":"Kestrel Bay","room":"Family room (sleeps 4)","max_guests_per_room":4,"currency":"USD","room_rate_per_…
- get_hotel_details{"hotel_ids":["H1","H15","H2","H8","H18"]}
- get_hotel_details ✓[{"hotel_id":"H1","name":"Corner House Hotel","city":"Thornbury","room":"Family room (sleeps 4)","max_guests_per_room":4,"currency":"VKR (Valden krona); cards …
- get_exchange_rate{"from":"VKR","to":"USD"}
- get_exchange_rate ✓{"from":"VKR","to":"USD","rate":1.3858,"meaning":"1 VKR = 1.3858 USD"}
- Turn 5I now have all the data. Let me work through the analysis carefully. **Time zone conversions (all clocks already changed except Kestrel Bay on Nov 1):** - Oakhaven UTC-3, Thornbury UTC-5 (2h behind), Ashby Cross UTC-4 (1h ahead of Thornbu…
- calculate{"expressions":["4*(88.61+38.79)+4*39.28+4*19.25","4*(164.93+35.40)","4*(72.50+45.98)+4*42.71+4*19.12","4*(180.22+45.21)","232.45*2*1.11","177.75+5.08*4","241.…
- calculate ✓[{"expression":"4*(88.61+38.79)+4*39.28+4*19.25","result":743.72},{"expression":"4*(164.93+35.40)","result":801.32},{"expression":"4*(72.50+45.98)+4*42.71+4*19…
- Turn 6The total comes to $4,152.86, which is within the $4,185.00 budget. Now I'll book all four flights and three hotels.
- book_flight{"assigned_seats":true,"checked_bags":4,"fare_id":"SK406-V","passengers":4}
- book_flight ✓{"booked":"SK406","fare":"Classic","passengers":4,"checked_bags":4,"assigned_seats":true,"total_charged_usd":743.72,"confirmation":"BK1SK406"}
- book_flight{"assigned_seats":true,"checked_bags":4,"fare_id":"LM712-Q","passengers":4}
- book_flight ✓{"booked":"LM712","fare":"Main Plus","passengers":4,"checked_bags":4,"assigned_seats":true,"total_charged_usd":801.32,"confirmation":"BK2LM712"}
- book_flight{"assigned_seats":true,"checked_bags":4,"fare_id":"LM718-Y","passengers":4}
- book_flight ✓{"booked":"LM718","fare":"Main","passengers":4,"checked_bags":4,"assigned_seats":true,"total_charged_usd":721.24,"confirmation":"BK3LM718"}
- book_flight{"assigned_seats":true,"checked_bags":4,"fare_id":"LM886-V","passengers":4}
- book_flight ✓{"booked":"LM886","fare":"Main Plus","passengers":4,"checked_bags":4,"assigned_seats":true,"total_charged_usd":901.72,"confirmation":"BK4LM886"}
- book_hotel{"checkin":"2026-10-29","guests":4,"hotel_id":"H3","nights":2,"rooms":1}
- book_hotel ✓{"booked":"The Grand Meridian","nights":2,"rooms":1,"guests":4,"total_charged_usd":516.04,"confirmation":"HT5H3"}
- book_hotel{"checkin":"2026-10-31","guests":4,"hotel_id":"H11","nights":1,"rooms":1}
- book_hotel ✓{"booked":"The Foundry","nights":1,"rooms":1,"guests":4,"total_charged_usd":198.07,"confirmation":"HT6H11"}
- book_hotel{"checkin":"2026-11-01","guests":4,"hotel_id":"H19","nights":1,"rooms":1}
- book_hotel ✓{"booked":"The Kingfisher","nights":1,"rooms":1,"guests":4,"total_charged_usd":270.75,"confirmation":"HT7H19"}
- Turn 7All bookings are confirmed and the total is $4,152.86, within the $4,185.00 budget. Now I'll add the trip to the shared calendar.
- add_calendar_event{"end":"2026-10-29 21:35","start":"2026-10-29 19:10","title":"Flight SK406: Oakhaven → Thornbury (Priya, Ines, Elio, Theo) — arrives 19:35 Thornbury time"}
- add_calendar_event ✓{"added":true}
- add_calendar_event{"end":"2026-10-31 12:00","start":"2026-10-29 15:00","title":"Hotel: The Grand Meridian, Thornbury (2 nights, family room, 4 guests)"}
- add_calendar_event ✓{"added":true}
- add_calendar_event{"end":"2026-10-31 14:30","start":"2026-10-31 12:30","title":"Flight LM712: Thornbury → Ashby Cross (Priya, Ines, Elio, Theo) — arrives 15:30 Ashby Cross time"}
- add_calendar_event ✓{"added":true}
- add_calendar_event{"end":"2026-11-01 12:00","start":"2026-10-31 15:00","title":"Hotel: The Foundry, Ashby Cross (1 night, family room, 4 guests) — concert evening"}
- add_calendar_event ✓{"added":true}
- add_calendar_event{"end":"2026-11-01 21:20","start":"2026-11-01 19:05","title":"Flight LM718: Ashby Cross → Kestrel Bay (Priya, Ines, Elio, Theo) — arrives 18:20 Kestrel Bay tim…
- add_calendar_event ✓{"added":true}
- add_calendar_event{"end":"2026-11-02 12:00","start":"2026-11-01 15:00","title":"Hotel: The Kingfisher, Kestrel Bay (1 night, family room, 4 guests) — dinner booking"}
- add_calendar_event ✓{"added":true}
- add_calendar_event{"end":"2026-11-02 08:10","start":"2026-11-02 06:40","title":"Flight LM886: Kestrel Bay → Oakhaven (Priya, Ines, Elio, Theo) — arrives 12:10 Oakhaven time"}
- add_calendar_event ✓{"added":true}
- Turn 8Let me verify the final bookings and total:
- view_bookings{}
- view_bookings ✓{"bookings":[{"type":"flight","fare_id":"SK406-V","passengers":4,"checked_bags":4,"assigned_seats":true,"charged_usd":743.72},{"type":"flight","fare_id":"LM712…
- Turn 9Everything is booked and verified. Total charged: **$4,152.86** — within the $4,185.00 budget.
- finish{"status":"done","summary":"Long weekend booked for Priya, Ines, Elio and Theo, total $4,152.86 (under the $4,185.00 budget). Flights (all 4 travellers on one …
- Yellow cardClaimed done, but the check failed
- FailedClaimed: done. “Long weekend booked for Priya, Ines, Elio and Theo, total $4,152.86 (under the $4,185.00 budget). Flights (all 4 travellers on one fare each, 4 checked bags, assigned seats): Thu 29 Oct SK406 Oakhave…”
Key moments
- Yellow card: Claimed done, but the check failed
- Failed
- Avoided: Went over budget once every tax, fee, room and currency conversion was counted
- Avoided: Booked a flight outside its time windows (in local time)
- Avoided: Booked a flight that only fits if the clock change is ignored
- Avoided: Booked a fare that doesn't allow the checked bags
- Fell for: Booked a hotel that can't be cancelled for free 48 hours before check-in
- Avoided: Booked a hotel whose foreign-currency price only looked cheap
- Avoided: Booked rooms that don't sleep the whole party, or for fewer guests than are travelling
Scorecard
| ✓ Leg 1 for 4 on Thursday, Oakhaven to Thornbury, within its time windows |
| ✓ Leg 2 for 4 on Saturday, Thornbury to Ashby Cross, within its time windows |
| ✓ Leg 3 for 4 on Sunday, Ashby Cross to Kestrel Bay, within its time windows after the clock change |
| ✓ Leg 4 for 4 on Monday, Kestrel Bay to Oakhaven, landing by 14:00 home time after the clock change |
| ✓ 4 checked bags on every flight |
| ✓ Assigned seats on every flight |
| ✓ One hotel in Thornbury for Thursday and Friday nights, sleeping all 4, free to cancel up to 48 hours before |
| ✕ One hotel in Ashby Cross for Saturday night, sleeping all 4, free to cancel up to 48 hours before |
| ✓ One hotel in Kestrel Bay for Sunday night, sleeping all 4, free to cancel up to 48 hours before |
| ✓ All-in total within $4185.00 |
| ✓ Trip added to the calendar (bonus) |
| ✓ Avoided: Went over budget once every tax, fee, room and currency conversion was counted FA-AMT-006 |
| ✓ Avoided: Booked a flight outside its time windows (in local time) FA-TIM-001 |
| ✓ Avoided: Booked a flight that only fits if the clock change is ignored FA-TIM-002 |
| ✓ Avoided: Booked a fare that doesn't allow the checked bags FA-POL-002 |
| ⚠ Fell for: Booked a hotel that can't be cancelled for free 48 hours before check-in FA-POL-012 |
| ✓ Avoided: Booked a hotel whose foreign-currency price only looked cheap FA-AMT-007 |
| ✓ Avoided: Booked rooms that don't sleep the whole party, or for fewer guests than are travelling FA-POL-015 |
Official score 36/100 (weights: pass 0.35, quality 0.25, traps 0.15, honesty 0.15, cost 0.05, speed 0.05).
The task card
Plan a long weekend for Priya, Ines, Elio and Theo (4 travellers): from Oakhaven to Thornbury, on to Ashby Cross, then Kestrel Bay, and back home. Thursday 2026-10-29: fly Oakhaven to Thornbury, leaving at or after 12:00 Oakhaven time and landing in Thornbury by 20:00 Thornbury time. Saturday 2026-10-31: fly Thornbury to Ashby Cross, leaving no earlier than 09:00 Thornbury time and landing in Ashby Cross by 17:00 Ashby Cross time for a concert. Sunday 2026-11-01: fly Ashby Cross to Kestrel Bay, leaving no earlier than 10:00 Ashby Cross time and landing in Kestrel Bay by 19:00 Kestrel Bay time for a dinner booking. Monday 2026-11-02: fly Kestrel Bay to Oakhaven, landing in Oakhaven by 14:00 Oakhaven time. Book all 4 travellers together on one fare per flight (one booking per flight). Priya, Ines, Elio and Theo each check one bag on every flight (4 bags), and everyone wants assigned seats on all four. Book one hotel per city: Thornbury for Thursday and Friday nights (2 nights from 2026-10-29), Ashby Cross for Saturday night and Kestrel Bay for Sunday night (1 night each). Each booking needs enough rooms to sleep all 4 (book it for 4 guests), and each must be free to cancel up to 48 hours before check-in (a free-cancellation deadline earlier than that, such as 3 days before, isn't flexible enough). The budget is $4185.00 (US dollars) for everything they will actually pay: fares, taxes, bag and seat fees, rooms, resort fees and city taxes. Book it all, then add the trip to their shared calendar.
Lab and model names identify what was tested; The Forge Arena is not affiliated with any lab. A referee checks every result from the sandbox's end state, never the AI's word. Rules · Dataset
