Run: 2026-05-29-01KSSK54CGV4T2AQDBM11CFMFF

Run Details

Duration:
6.9s
Cost:
$0.008750
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 hammered the old windows. Detective Cole entered the room. Blood pooled beneath the desk. The victim wore expensive shoes. His eyes stared at nothing. A knife lay nearby, gleaming. Cole knelt beside the body. Something felt deeply wrong here. The door had been locked. No windows showed forced entry. Yet someone killed this man. Cole studied every small detail. A photograph rested on shelves. It showed three smiling friends. One face was scratched out. The clock had stopped completely. It read exactly midnight then. Cole pulled out his notebook. This case would prove difficult. Outside, the storm grew louder. Footsteps echoed down the hallway. His partner arrived too late. "What happened here?" she asked. Cole simply shook his head. The answers remained stubbornly hidden. Somebody knew the dark truth. He would find them eventually.
created_at"2026-05-29T10:05:54.458Z" 5/29/2026, 10:05:54 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2477
moderation_latency(null)
generation_time6872
tokens_prompt46
tokens_completion255
native_tokens_prompt60
native_tokens_completion338
native_tokens_completion_images(null)
native_tokens_reasoning43
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"
usage0.00875
router(null)
provider_responses
0
endpoint_id"dfc0e5bd-d703-4fe2-a7bb-655eb95d5441"
id"msg_014hRCiZZkyLZsAx4EA7iXEm"
is_byokfalse
latency1070
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-1780049154-5q1WqIPtnxDhnAIFPYIM"
session_id(null)
api_type"completions"
id"gen-1780049154-PpK7x4wb8D5rVAlbScHG"
upstream_id"msg_014hRCiZZkyLZsAx4EA7iXEm"
total_cost0.00875
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
sentences27
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
245
255
265