Run: 2026-10-08-01M4DYY7J0FEYPMDK4PZP6DFZH

Run Details

Duration:
4.4s
Cost:
$0.000275
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
87.04% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain hammered against the mansion windows that November night. Detective Eleanor Vance stepped carefully across the wet gravel driveway. Nobody in the village had expected trouble at Blackwood Manor ever. Her flashlight beam swept over the ivy-covered stone steps ahead. Officer Thomas Reed waited beside the iron gate, collar turned up. "The body's inside, in the library," he said quietly. Eleanor nodded, though her stomach tightened with unwelcome dread. The heavy oak door stood slightly ajar, creaking in the wind. She pushed it open and stepped into the dim foyer. A grandfather clock ticked somewhere, marking each passing second relentlessly. Dust motes drifted through the thin beam of her light. Thomas followed close behind, his boots echoing on marble tiles. They passed a portrait of Lord Alistair Blackwood, stern and watchful. Its painted eyes seemed to follow them toward the library. At the threshold, Eleanor paused and studied the scene carefully. Lord Blackwood lay slumped across his mahogany desk, motionless. A single silver letter opener protruded from beneath his left shoulder. Beside him, an overturned teacup had stained the expensive Persian rug. "Who found him?" Eleanor asked, not taking her eyes away. "His wife, Margaret," Thomas replied, glancing toward the staircase. Eleanor knelt beside the desk and noticed something peculiar immediately. The ink bottle was open, yet the desk held no letters.
created_at"2026-10-08T14:33:38.123Z" 10/8/2026, 2:33:38 PM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4334
moderation_latency(null)
generation_time4334
tokens_prompt46
tokens_completion365
native_tokens_prompt62
native_tokens_completion537
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.0002747
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791470018-a6TtwWwT1HeBDTpov83h"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791470018-QaNFLPHocyglqVR6Zxzm"
upstream_id"msg_011CfpwAXUu17VMzaxwHLwbq"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpwAXUu17VMzaxwHLwbq"
is_byokfalse
latency893
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0002747
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
87.04% Matches word count n/a
neededCleanfalse
sentences22
wordCounts
010
110
211
310
411
59
69
711
810
910
1010
1110
1211
1310
1410
159
1611
1711
1810
199
2010
2111