Run: 2026-10-09-01M4FZVM4BPRTJP1XAPXPNJDEP

Run Details

Duration:
3.3s
Cost:
$0.000189
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
66.15% 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 rain fell hard on Ashford Manor tonight. Detective Harold Quinn stepped carefully through the muddy garden. A single lantern flickered beside the open study window. Inside, the body of Lady Eleanor Vance lay motionless. Her silver pearl necklace had vanished from her throat completely. Quinn knelt beside her, noting the faint scent of bitter almonds. Two teacups sat untouched upon the mahogany side table nearby. One cup still held a thin ribbon of amber liquid. The butler, Thomas Greaves, hovered anxiously in the doorway behind him. "She never drinks alone," Greaves whispered, twisting his trembling hands together. Quinn studied the window latch, which showed fresh scratches around its edge. Someone had entered through this window, or someone wanted it to appear so. He rose slowly, his knees cracking in the damp, cold silence. Outside, thunder rolled across the hills like distant cannon fire. Quinn turned to Greaves and asked, "Who else was in this house tonight?"
created_at"2026-10-09T09:28:10.129Z" 10/9/2026, 9:28:10 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency761
moderation_latency(null)
generation_time3269
tokens_prompt46
tokens_completion249
native_tokens_prompt62
native_tokens_completion365
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.0001887
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791538090-vHuWvRJSKstkjeHtNAGd"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791538090-SOK4UNgx4flelHz6JNjg"
upstream_id"msg_011CfrRgQKeBcSQNBzwKCqV4"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrRgQKeBcSQNBzwKCqV4"
is_byokfalse
latency761
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001887
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
66.15% Matches word count n/a
neededCleanfalse
sentences15
wordCounts
08
19
29
39
410
511
610
710
811
911
1012
1113
1211
1310
1413