Run: 2026-10-09-01M4FXHCYRGAFJ0HMQ5XMTRTQH

Run Details

Duration:
3.3s
Cost:
$0.000191
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
67.40% 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 had not stopped for three days straight now. Detective Mara Voss stepped carefully across the wet cobblestones. Yellow tape fluttered weakly against the iron gates of Hawthorne Manor. Officer Dan Ruiz met her at the entrance with a grim expression. "The body was found in the library," he said quietly. Mara pulled on her gloves and followed him inside. The air smelled of old paper, smoke, and something metallic. Portraits of stern ancestors watched them from dim, silent walls. A single lamp burned near the far window, casting long shadows. Beneath it lay Edwin Hawthorne, face down, still wearing his reading glasses. Mara knelt beside him and noticed a brass key clutched in his fist. Her eyes drifted to the overturned chair nearby. Someone had been in this room in a hurry. She glanced at the locked cabinet, its door hanging slightly open. Whoever killed Edwin Hawthorne had wanted something inside that cabinet. Mara stood up slowly and turned toward the hallway. Somewhere in the house, a door creaked shut.
created_at"2026-10-09T08:47:38.092Z" 10/9/2026, 8:47:38 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency803
moderation_latency(null)
generation_time3089
tokens_prompt46
tokens_completion257
native_tokens_prompt62
native_tokens_completion370
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"
usage0.0001912
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791535658-31gciVHUvXx624c3s3Or"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791535658-9PL9gWnzvrVfWPrXGVp9"
upstream_id"msg_011CfrNb8g4rZNcmAAhzdUVf"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrNb8g4rZNcmAAhzdUVf"
is_byokfalse
latency803
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001912
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
67.40% Matches word count n/a
neededCleanfalse
sentences17
wordCounts
010
19
211
312
410
59
610
710
811
912
1013
118
129
1311
1410
159
168