Run: 2026-03-18-01KM0968A4731MVSQ4W5RZDBZN

Run Details

Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
1.1s
Cost:
$0.000121
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
84.52% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Night settled over silent Harbor Lane. The detective arrived at foggy pier. A scream echoed past sleeping warehouses. Inside, a body lay cold. Dr. Marrow watched, eyes sharp. Constable Haines guarded the doorway. A lantern flickered above shattered glass. On the floor, blood formed patterns. No witnesses dared approach the scene. The captain demanded answers immediately, urgently.
created_at"2026-03-18T10:52:15.568Z" 3/18/2026, 10:52:15 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency470
moderation_latency(null)
generation_time987
tokens_prompt46
tokens_completion107
native_tokens_prompt41
native_tokens_completion90
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"
usage0.0001207
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0f1d6a1e700b93c70169ba83dfa104819582039576f3506e42"
is_byokfalse
latency215
model_permaslug"openai/gpt-5.4-nano-20260317"
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-1773831135-rScGS9RIZnn4WOTUtYaa"
upstream_id"resp_0f1d6a1e700b93c70169ba83dfa104819582039576f3506e42"
total_cost0.0001207
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
84.52% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
06
16
26
35
45
55
66
76
86
96