Run: 2026-05-31-01KSYXFBD11VDY4S27N9ZKR88P

Run Details

Duration:
8.1s
Cost:
$0.007400
Provider:
Anthropic

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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain fell on the manor. Detective Hayes parked his car. The front door stood open. Inside, silence gripped every room. A woman lay quite still. Blood stained the white carpet. Her eyes stared at nothing. Hayes knelt beside the body. The clock read midnight exactly. Someone had stopped its hands. A wine glass sat broken. Two chairs faced the fireplace. One held a man's coat. Hayes noticed muddy boot prints. They led toward the library. He drew his service weapon. The house felt strangely cold. Every window remained locked tight. The killer was still here.
created_at"2026-05-31T11:42:27.245Z" 5/31/2026, 11:42:27 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5725
moderation_latency(null)
generation_time8049
tokens_prompt46
tokens_completion203
native_tokens_prompt60
native_tokens_completion284
native_tokens_completion_images(null)
native_tokens_reasoning49
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"
usage0.0074
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01VwYtcSHD3hKFNooqqiDFMd"
is_byokfalse
latency3463
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780227747-NEVDRjlaG6xBCDax5ppy"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780227747-1QieaGSSsMZrn2TpkzT0"
upstream_id"msg_01VwYtcSHD3hKFNooqqiDFMd"
total_cost0.0074
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences19
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185