Run: 2026-09-23-01M37PYHX967V73SPGT31AACW1

Run Details

Duration:
13.6s
Cost:
$0.021868
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
95.24% 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 manor. Thunder shook every dark window. Inside, the grandfather clock stopped. Lady Ashford screamed at midnight. The guests rushed downstairs quickly. They found the library door. It was locked from inside. The butler broke it open. Lord Ashford lay perfectly still. A silver dagger gleamed nearby. Blood stained the Persian rug. Nobody spoke for a moment. Then Doctor Harlow knelt down. He checked for a pulse. "He is dead," he whispered. Detective Graves stepped from shadows. No one saw him arrive. He studied each pale face. "Nobody leaves this house tonight." The storm raged on outside. Somewhere, a floorboard creaked softly. One of them was lying.
created_at"2026-09-23T18:02:51.704Z" 9/23/2026, 6:02:51 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4874
moderation_latency(null)
generation_time13566
tokens_prompt46
tokens_completion303
native_tokens_prompt62
native_tokens_completion1081
native_tokens_completion_images(null)
native_tokens_reasoning825
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"
usage0.021868
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186571-eVdicT1HiJmvpe6s7WRW"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186571-cKdTAFEmgsDDs0W8yxIF"
upstream_id"msg_011CfLozAPgvcgVcPaXZ7UsH"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLozAPgvcgVcPaXZ7UsH"
is_byokfalse
latency1194
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.021868
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
95.24% Matches word count n/a
neededCleanfalse
sentences21
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
1810
195
205