Run: 2026-03-09-01KK9Q9SA2ST03726BM1RYNSW0

Run Details

Duration:
28.7s
Cost:
$0.027807
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 polished manor windows while Inspector Vale arrived, summoned before dawn by a voice trembling around one impossible word: murder. Inside, candles guttered in silver sconces, and the household waited along the corridor like mourners rehearsing grief before confirmation arrived. Lady Winter stood nearest the library door, her pearl necklace broken, white beads scattered like tiny alibis across the carpet. On the Persian rug beyond her slippered feet, Augustus Blackwell lay smiling faintly, a letter opener planted beneath his ribs. The clock above the mantel showed six, yet nobody flinched, because it had stopped hours earlier, exactly at midnight sharp. Vale removed his gloves, noting mud on the sill, perfume in the smoke, and one guest carefully avoiding Augustus entirely.
created_at"2026-03-09T16:36:19.404Z" 3/9/2026, 4:36:19 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency28157
moderation_latency(null)
generation_time28510
tokens_prompt46
tokens_completion730
native_tokens_prompt41
native_tokens_completion1847
native_tokens_completion_images0
native_tokens_reasoning1690
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0278075
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0dbe8441616391d00169aef7037f44819594c1da35660bd50b"
is_byokfalse
latency206
model_permaslug"openai/gpt-5.4-20260305"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773074179-JU4se9BurFMhZYrNra9K"
upstream_id"resp_0dbe8441616391d00169aef7037f44819594c1da35660bd50b"
total_cost0.0278075
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520