Run: 2026-10-27-01M5YJKF187V974G9E63HZCTD2

Run Details

Duration:
13.1s
Cost:
$0.005661
Provider:
OpenAI

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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain arrived before dawn, drumming against the windows of Blackthorn House while its owner lay dead beneath the piano. At seven, the housekeeper discovered him, one hand clutching a silver key, the other pointing toward the locked library door. She screamed once, then stopped when she touched his hand and saw a shadow moving behind the heavy velvet curtains. A muddy footprint marked the carpet beside him, its narrow heel pressed over a dark stain that still looked wet. By the time Detective Mara Voss arrived, the household had gathered in the drawing room, silent beneath their host’s portrait. His widow wore pearls over her nightdress, and his brother held a glass containing something stronger than the morning required. Nobody admitted hearing a shot, although the wound was unmistakable, and nobody could explain why every clock had stopped together. Voss examined the key, then asked who had opened the library, and watched the widow’s fingers tighten around her pearls.
created_at"2026-10-27T11:40:49.589Z" 10/27/2026, 11:40:49 AM
model"openai/gpt-6.1-terra-20261026"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4351
moderation_latency(null)
generation_time13087
tokens_prompt46
tokens_completion706
native_tokens_prompt41
native_tokens_completion1124
native_tokens_completion_images0
native_tokens_reasoning927
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"completed"
service_tier"default"
usage0.005661
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.22.1; linux; x64))"
http_referer(null)
request_id"req-1793101249-WKaa7ceuxwNOgQ6e0W8J"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1793101249-JNuvfy7m25L2xRRW0LZZ"
upstream_id"resp_0eb3131dfc6062cf016ae08dc1a64c87d1b6204d86a58c0ec4"
provider_responses
0
endpoint_id"2d2ad10f-098e-4bbf-aa95-11f705b2b9a2"
id"resp_0eb3131dfc6062cf016ae08dc1a64c87d1b6204d86a58c0ec4"
is_byokfalse
latency265
model_permaslug"openai/gpt-6.1-terra-20261026"
provider_name"OpenAI"
status200
total_cost0.005661
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
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
sentences8
wordCounts
020
120
220
320
420
520
620
720