{
  "arm": "GPT-5.5",
  "provider": "openai",
  "benchmark": "postcutoff_pilot_v1",
  "freeze_tag": "postcutoff-pilot-v1-freeze-20260705",
  "note": "Frontier comparator. Single public model; full per-task output included.",
  "tasks": [
    {
      "task_id": "PILOT-N2",
      "task_type": "math",
      "answer": "30907",
      "gold": "30907",
      "correct": true,
      "tokens_in": 139,
      "tokens_out": 6070,
      "cost_usd": 0.182795,
      "latency_s": 62.5,
      "timed_out": false,
      "solution": "Let \\(x\\) mark the number of \\(1\\times1\\) square tiles. We count tilings of a \\(3\\times n\\) rectangle with dominoes and monomers, then take the coefficient of \\(x^2\\) for \\(n=10\\).\n\nUse a column-by-column transfer DP. For each column, let a mask record which cells are already occupied by horizontal dominoes from the previous column. By top-bottom symmetry, define:\n\n- \\(a_n\\): mask \\(000\\)\n- \\(b_n\\): masks \\(001,100\\)\n- \\(c_n\\): mask \\(010\\)\n- \\(d_n\\): masks \\(011,110\\)\n- \\(e_n\\): mask \\(101\\)\n- \\(f_n\\): mask \\(111\\)\n\nKeeping only terms up to degree \\(2\\) in \\(x\\), the transitions are:\n\n\\[\n\\begin{aligned}\na'&=2xa+2(1+x^2)b+x^2c+2xd+xe+f,\\\\\nb'&=(1+x^2)a+xc+xb+d,\\\\\nc'&=x^2a+2xb+e,\\\\\nd'&=xa+b,\\\\\ne'&=xa+c,\\\\\nf'&=a.\n\\end{aligned}\n\\]\n\nStart with\n\n\\[\n(a_0,b_0,c_0,d_0,e_0,f_0)=(1,0,0,0,0,0).\n\\]\n\nIterating to \\(n=10\\), the coefficient of \\(x^2\\) in \\(a_{10}\\) is\n\n\\[\n30907.\n\\]\n\nTherefore the number of tilings is\n\nANSWER: 30907"
    },
    {
      "task_id": "PILOT-K1",
      "task_type": "code",
      "answer": "117557",
      "gold": "121090",
      "correct": false,
      "tokens_in": 125,
      "tokens_out": 9327,
      "cost_usd": 0.280435,
      "latency_s": 149.03,
      "timed_out": false,
      "solution": "ANSWER: 117557"
    },
    {
      "task_id": "PILOT-Q1",
      "task_type": "simple_qa",
      "answer": "10152",
      "gold": "10152",
      "correct": true,
      "tokens_in": 150,
      "tokens_out": 259,
      "cost_usd": 0.00852,
      "latency_s": 6.46,
      "timed_out": false,
      "solution": "The depot delivers **10,152** units for the week.\n\nANSWER: 10152"
    },
    {
      "task_id": "PILOT-R1",
      "task_type": "reasoning",
      "answer": "12",
      "gold": "12",
      "correct": true,
      "tokens_in": 174,
      "tokens_out": 1626,
      "cost_usd": 0.04965,
      "latency_s": 25.42,
      "timed_out": false,
      "solution": "The only race order satisfying all conditions is:\n\n1. Cleo  \n2. Ava  \n3. Ben  \n4. Eve  \n5. Dan  \n\nThe liars are Ben and Eve, who finished in positions 3 and 4. Their product is:\n\n\\[\n3 \\times 4 = 12\n\\]\n\nANSWER: 12"
    },
    {
      "task_id": "PILOT-C1",
      "task_type": "code",
      "answer": "300073",
      "gold": "300062",
      "correct": false,
      "tokens_in": 117,
      "tokens_out": 19081,
      "cost_usd": 0.573015,
      "latency_s": 247.15,
      "timed_out": false,
      "solution": "Using a sieve of Eratosthenes up to \\(300006\\), test each \\(n\\) with \\(2\\le n\\le 300000\\) for primality of:\n\n\\[\nn,\\quad n+4,\\quad n+6.\n\\]\n\nThe valid integers \\(n\\) total:\n\n\\[\nA=600\n\\]\n\nand the largest such integer is:\n\n\\[\nB=299473.\n\\]\n\nThus,\n\n\\[\nA+B=600+299473=300073.\n\\]\n\nANSWER: 300073"
    }
  ]
}