Run: 2026-10-08-01M4DAHW2Q2QT1CK1883K8FY2Z

Run Details

Duration:
13.4s
Cost:
$0.001785
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
100.00% 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 fell hard on Ashford Manor that cold night. Detective Mara Quill arrived just after midnight, soaked and silent. The body lay face down beside the library's oak door. Lord Edmund Ashford had been found there just before dawn. A single bullet had pierced his heart before he fell. Nobody in the old household admitted hearing that fatal gunshot. Mara knelt beside the body and studied the scattered papers. Someone had carefully torn several pages from the victim's diary. Her partner, Inspector Tom Reyes, frowned at the fresh footprints. Those muddy prints led straight toward the locked east wing. Mara followed them, her flashlight trembling in the bitter cold. Halfway down the dim corridor, she stopped suddenly and listened. Somewhere above, a door creaked open, then quietly closed again. Heavy footsteps followed, slow and deliberate, descending the narrow stairs. Mara drew her revolver and whispered one sharp, urgent word. Nobody answered, and the footsteps suddenly stopped at the landing. In that silence, Mara heard only her own ragged breathing. Then a low voice whispered her name from the darkness.
created_at"2026-10-08T08:37:21.628Z" 10/8/2026, 8:37:21 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency13385
moderation_latency(null)
generation_time13385
tokens_prompt46
tokens_completion286
native_tokens_prompt62
native_tokens_completion3557
native_tokens_completion_images(null)
native_tokens_reasoning3146
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"
usage0.0017847
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448641-lfxxDfcGDOuynerTnn3Y"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448641-lu4XqWHkDAJXy43uIbOE"
upstream_id"msg_011CfpTzmTMm5Z1rYhfeKUgK"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTzmTMm5Z1rYhfeKUgK"
is_byokfalse
latency766
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0017847
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
100.00% Matches word count n/a
neededCleanfalse
sentences18
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310
1410
1510
1610
1710