Run: 2026-07-09-01KX40TCDY2RVGK9ASF1EQ05J4

Run Details

Duration:
10.9s
Cost:
$0.020157
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
Rain stitched silver seams across Blackwater Manor when Detective Mara Vale arrived, summoned by a caller who suddenly fell silent. The iron gates stood open, though the caretaker swore nobody had entered or left since dusk, before the storm began. Inside, candles guttered along the corridor, illuminating wet footprints that ended beneath the portrait depicting the manor's founder, Sir Julian. At the footprints' end, Lord Bellamy lay smiling, a jeweled letter opener protruding neatly from his immaculate evening jacket front. His guests waited downstairs, drinking brandy beneath chandeliers, each claiming to have heard nothing except thunder and a single scream. Mara knelt beside the body and noticed mud beneath Bellamy's fingernails, as though he had clawed desperately at earth outside. Then the grandfather clock chimed midnight, and every candle went dark, leaving someone else breathing quietly within the corridor nearby.
created_at"2026-07-09T18:04:12.106Z" 7/9/2026, 6:04:12 PM
model"openai/gpt-5.6-terra-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9557
moderation_latency(null)
generation_time10295
tokens_prompt46
tokens_completion248
native_tokens_prompt41
native_tokens_completion1337
native_tokens_completion_images0
native_tokens_reasoning1147
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"
usage0.0201575
router(null)
provider_responses
0
endpoint_id"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id"resp_0b1ffb6603c73223016a4fe29c2f84819795d1d742ab3c0a1e"
is_byokfalse
latency420
model_permaslug"openai/gpt-5.6-terra-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783620252-kLyEw8BsCZ69m7lLwZEf"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620252-8v1zXCLIGsKHQTDcbEuJ"
upstream_id"resp_0b1ffb6603c73223016a4fe29c2f84819795d1d742ab3c0a1e"
total_cost0.0201575
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620