Run: 2026-07-09-01KX41EZ8K9AMHJ7DNE5V825K7

Run Details

Duration:
8.9s
Cost:
$0.017128
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 hammered Blackthorn Manor as Inspector Vale arrived, summoned by a telephone call that ended with a single terrified scream. The butler admitted him silently, his white gloves stained crimson, while thunder swallowed the questions gathering behind Vale's careful teeth. In the library, Lord Ashcombe lay beside the fireplace, his antique watch stopped precisely at eleven minutes past midnight, inexplicably. Five guests waited nearby, each claiming innocence, yet nobody mentioned the locked door, the missing key, or the unlit candles. Vale knelt carefully, noticing mud beneath the corpse's fingernails and a silver button clenched tightly within his frozen still hand. Then the grandfather clock chimed once, though its pendulum hung motionless, and every guest turned toward the darkened hallway nearby. From upstairs came the slow scrape of furniture, followed by a woman's whisper: “He was dead before you arrived tonight.” Vale rose, pocketed the button, and understood that the murderer had expected him, perhaps even invited him here tonight personally.
created_at"2026-07-09T18:15:26.747Z" 7/9/2026, 6:15:26 PM
model"openai/gpt-5.6-terra-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3180
moderation_latency(null)
generation_time8463
tokens_prompt46
tokens_completion567
native_tokens_prompt41
native_tokens_completion1135
native_tokens_completion_images0
native_tokens_reasoning925
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"
usage0.0171275
router(null)
provider_responses
0
endpoint_id"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id"resp_070c3b885c6288fc016a4fe53ee0b8819091edbfe902a684b6"
is_byokfalse
latency280
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-1783620926-ns5VpkXcNzoSFG3o5Yiq"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620926-5DXhkgKhfpdjnrt59XJJ"
upstream_id"resp_070c3b885c6288fc016a4fe53ee0b8819091edbfe902a684b6"
total_cost0.0171275
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
sentences8
wordCounts
020
120
220
320
420
520
620
720