Run: 2026-09-23-01M37PBDTDV7RJXX7ZW87SV6DJ

Run Details

Duration:
16.0s
Cost:
$0.032608
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The storm had raged over Blackwood Manor since early evening. Inside, the guests gathered nervously around the dying fire's glow. Lord Ashford had not appeared for dinner, which was unusual. His wife insisted he was merely resting in the study. Nobody believed her, but nobody dared to say so aloud. At midnight, the old clock in the hallway struck twelve. Then a terrible scream echoed through the long stone corridors. Everyone rushed toward the study, where the door stood open. The maid was trembling beside the desk, her face pale. Lord Ashford lay slumped, a silver knife in his back. Blood had soaked his jacket and stained the scattered papers. Detective Harriet Vale stepped forward and studied the grim scene. She noticed the window was locked firmly from the inside. Whoever killed him had walked out through the only door. That meant the murderer was standing in this very room.
created_at"2026-09-23T17:52:24.926Z" 9/23/2026, 5:52:24 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4740
moderation_latency(null)
generation_time16011
tokens_prompt46
tokens_completion426
native_tokens_prompt62
native_tokens_completion1618
native_tokens_completion_images(null)
native_tokens_reasoning1321
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"
usage0.032608
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790185944-eXMNhttkpBNOsVQIPhcd"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790185944-zy9KyNIiW2PZwdsb7g0z"
upstream_id"msg_011CfLoBxXXn11hv5wr1gNxu"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLoBxXXn11hv5wr1gNxu"
is_byokfalse
latency1304
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.032608
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
sentences15
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310
1410