Run: 2026-10-09-01M4FZV18824WMY5NCYP317QZS

Run Details

Duration:
12.3s
Cost:
$0.001247
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain had been falling over Ashford Manor since dawn, washing the cobblestones into dark, glossy mirrors that reflected nothing. Inspector Eleanor Vance stood beneath the dripping oak in her borrowed black coat, studying the body slumped against the gate. Lord Thaddeus Crowe had been found that cold morning with a silver letter opener buried deep in his chest cavity. Nobody in the household admitted to having seen him after the old grandfather clock struck eleven on that Tuesday night. Detective Sergeant Hollis crouched beside her, brushing aside wet leaves revealing a muddy footprint half-hidden that pointed toward the hedge.
created_at"2026-10-09T09:27:50.798Z" 10/9/2026, 9:27:50 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2540
moderation_latency(null)
generation_time12262
tokens_prompt46
tokens_completion353
native_tokens_prompt62
native_tokens_completion2482
native_tokens_completion_images(null)
native_tokens_reasoning2254
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"
usage0.0012472
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791538070-r5K8zDRoUGi5qNo8ftC5"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791538070-XxFYtFHs6XGVaVn5EB5D"
upstream_id"msg_011CfrReybpunUkaFmoLxtvJ"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrReybpunUkaFmoLxtvJ"
is_byokfalse
latency757
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0012472
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
sentences5
wordCounts
020
120
220
320
420