{
  "generated_by": "tools/fanout_longctx_probe.py",
  "host": {
    "cpu_count": 32,
    "dedicated_gpu_vram_bytes": 0,
    "platform": "win32",
    "total_ram_bytes": 272252637184,
    "total_ram_gib": 253.6
  },
  "kv_cache_bytes": 15032385536,
  "kv_cache_gib": 14.0,
  "kv_fits_host_ram": true,
  "model_geometry": {
    "dtype_bytes": 2,
    "head_dim": 128,
    "kv_bytes_per_token": 57344,
    "kv_heads": 4,
    "layers": 28
  },
  "note": "No silent extrapolation: the MODELED token economics for this P live in docs/benchmarks/FANOUT-BENCH-RESULTS.md (pscale table). This artifact records only what a REAL model path could measure on this host \u2014 here, a recorded ceiling, not a wall-clock number.",
  "overall": "SKIPPED_NO_LONGCTX_PATH",
  "paths": [
    {
      "context_ceiling_tokens": 512,
      "detail": "selected checkpoint max_position_embeddings=512 < 262144 (512x short); config=internal/model/.cache/minimax-m3-tiny/config.json",
      "measured_kv_bytes": null,
      "path": "fak-in-kernel",
      "prefill_ms": null,
      "reason": "CONTEXT_CEILING",
      "status": "skipped",
      "ttft_ms": null
    },
    {
      "detail": "llama.cpp present (C:\\Users\\USER\\AppData\\Local\\Microsoft\\WinGet\\Packages\\ggml.llamacpp_Microsoft.Winget.Source_8wekyb3d8bbwe\\llama-cli.EXE) but no .gguf with context >= 262144 found on host; KV for qwen25-7b at P=262144 is 14.0 GiB, host RAM 253.6 GiB (fits)",
      "measured_kv_bytes": null,
      "path": "llama.cpp",
      "prefill_ms": null,
      "reason": "MODEL_UNAVAILABLE",
      "status": "skipped",
      "ttft_ms": null
    },
    {
      "detail": "no prefix-caching server reachable (none of 127.0.0.1:8000, 127.0.0.1:30000)",
      "measured_kv_bytes": null,
      "path": "vllm-sglang",
      "prefill_ms": null,
      "reason": "SERVER_UNAVAILABLE",
      "status": "skipped",
      "ttft_ms": null
    }
  ],
  "prefix_tokens": 262144,
  "reference_model": "qwen25-7b",
  "schema": "fanout-longctx-measure/1"
}
