Run: 2026-03-06-01KK1H18C0WVV4SQ3HR2G8GQ0Q

Run Details

Model:
GPT-5.4
Duration:
4.2s
Cost:
$0.001992
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
59.10% 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 rattled Blackwood Manor as guests gathered silently, unaware the night would end with one among them dead before dawn. At precisely eight, the chandelier flickered twice, and Lady Harrow smiled thinly, concealing dread beneath her diamonds and velvet. No one noticed the butler's trembling hands, nor the muddy footprints drying beside the library door's tarnished brass threshold. During supper, conversation sparkled politely, yet every laugh sounded strained, as though rehearsed for an audience of judges. Then the clock struck nine, and somewhere deep inside the house, a woman screamed once before silence swallowed everything.
created_at"2026-03-06T12:12:52.998Z" 3/6/2026, 12:12:52 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency465
moderation_latency(null)
generation_time4182
tokens_prompt46
tokens_completion163
native_tokens_prompt41
native_tokens_completion126
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.0019925
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_05d495d1280f7e940169aac4c50fd081968c5c014a2738c46f"
is_byokfalse
latency159
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-1772799173-uxzf5XyIePOAhlA9y4PB"
upstream_id"resp_05d495d1280f7e940169aac4c50fd081968c5c014a2738c46f"
total_cost0.0019925
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
59.10% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
119
219
318
419