Run: 2026-09-23-01M37PE7NV11EA0EDQ660Y5W5D

Run Details

Duration:
15.8s
Cost:
$0.024068
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain lashed the old manor. Thunder rolled across dark hills. Inside, candles flickered and died. Lady Ashford screamed from upstairs. Everyone rushed toward the library. The heavy door stood open. Colonel Grey lay motionless there. Blood pooled beneath his head. A silver letter opener gleamed. Nobody spoke for a moment. Then Hobbs, the butler, coughed. "The doors remain locked, madam." Detective Marlowe stepped slowly forward. She studied the cold body. His pocket watch had shattered. Its hands read nine fifteen. Behind her, the clock chimed. It struck ten times exactly. Someone here was already lying. Marlowe turned to face them. Six pale faces stared back. "The killer is among us."
created_at"2026-09-23T17:53:56.945Z" 9/23/2026, 5:53:56 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency15761
moderation_latency(null)
generation_time15761
tokens_prompt46
tokens_completion272
native_tokens_prompt62
native_tokens_completion1191
native_tokens_completion_images(null)
native_tokens_reasoning929
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"
usage0.024068
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186036-SUJddgeW3bHVWIA2eWQJ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186036-SPl9OW7BnhiGXkf93VKh"
upstream_id"msg_011CfLoJk3davni2XUUrUTYH"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLoJk3davni2XUUrUTYH"
is_byokfalse
latency1223
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.024068
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
sentences22
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215