{
  "base_url": "[operator identity redacted]",
  "clock_domain_id": null,
  "completed": 3,
  "concurrency": 1,
  "configuration_fingerprint": null,
  "context_distribution": {
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  "context_seed": 17,
  "context_tokens": 8192,
  "controlled_output_policy": "observe",
  "engine": "strata",
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  "failures": [],
  "finished_at": "2026-10-05T10:33:06Z",
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  "gpu": "rtx5090",
  "manifest": null,
  "max_context_tokens": 32768,
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  "measurement_protocol": "capacity-v4-reasoning",
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    "failure_policy": "failed or contract-invalid responses retain sanitized timing and metadata but are excluded from performance distributions",
    "p99_interpretation": "descriptive-nearest-rank-only",
    "p99_interpretation_by_metric": {
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      "e2e": "descriptive-nearest-rank-only",
      "effective_prefill_tok_s": "descriptive-nearest-rank-only",
      "tpot": "descriptive-nearest-rank-only",
      "ttft": "descriptive-nearest-rank-only"
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    "performance_eligible_requests": 3,
    "successful_requests": 3
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      "mean_inter_token_latency_ms": 12.745167791411856,
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      "output_token_source": "usage",
      "output_tokens": 327,
      "planned_context_tokens": 8192,
      "prompt_tokens": 7418,
      "reasoning_chunks": 289,
      "request_canary": {
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        "foreign_marker_count": 0,
        "marker": "ANVIL_REQ_17_00002",
        "marker_at_start": true,
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      "request_index": 2,
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  "requests": 3,
  "response_words": 0,
  "responses_received": 3,
  "run_id": "benchmark-20261005T103137Z",
  "sampling": {
    "temperature": {
      "effective_request": 0.9,
      "requested": 0.9,
      "sent": true
    },
    "top_p": {
      "effective_request": 0.95,
      "requested": 0.95,
      "sent": true
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  "schema": "anvil-serving.benchmark/v1",
  "serve_flags": {
    "no_thinking": false,
    "reasoning_effort": null,
    "shared_prefix_burst": false,
    "thinking_mode": "default"
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  "shared_prefix_tokens": 0,
  "source_recipe": null,
  "started_at": "2026-10-05T10:31:37Z",
  "started_at_unix_ns": 1791196297209679900,
  "tier": null,
  "timestamp_precision": "nanosecond-unix-fields; ISO labels are second precision",
  "timing_methodology": {
    "artifact_timestamps": "time.time_ns Unix timestamps; independent artifacts may align them only when the operator supplied the same explicit clock_domain_id",
    "clock": "client time.perf_counter",
    "controlled_output": "--response-words adherence is recorded; observe preserves historical behavior while strict rejects non-exact or truncated completions; visible response capture is capped at 8192 characters",
    "decode": "usage completion tokens after the first token divided by client-observed generation time; completion tokens may include reasoning tokens",
    "distributions": "request-level mean, sample standard deviation, normal-approximation 95% confidence interval for the mean, min, p25, p50, p75, p90, p95, p99, and max using the nearest-rank percentile method",
    "effective_prefill": "usage.prompt_tokens divided by client-observed time to first output; includes queueing, scheduling, prefill, and first-token work",
    "generation": "client-observed E2E minus time to first output",
    "mean_inter_token_latency": "legacy key for a TPOT proxy: client-observed generation time divided by completion tokens after the first token; not raw per-token ITL",
    "p99": "numeric nearest-rank p99 is always retained for compatibility; it is descriptive only below 100 eligible samples",
    "request_canaries": "when enabled, each response must begin with its own synthetic marker and contain no other ANVIL_REQ marker; bounded/truncated captures fail closed and are excluded from performance metrics",
    "time_to_first_output": "request start through the first non-empty streamed reasoning or content delta",
    "tpot": "client-observed mean time per output token after the first output; identical to the legacy mean_inter_token_latency key",
    "ttft": "request start through the first non-empty streamed content delta"
  },
  "wall_clock_ms": 89696.96900000054
}
