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Run: 2026-03-18-01KM0AJ1PYATFP0QZPP88NY4VT
Run Details
Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
3.5s
Cost:
$0.000853
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
At midnight, the harbor bell tolled, summoning everyone to dock. Captain Hale lay silent inside his cabin, door locked tight. Detective Mara Quinn arrived, rain dripping from her fedora slowly. She noted a glass untouched beside a steaming tea cup. Outside, gulls screamed while lanterns flickered over wet boards below. The mate swore he heard singing, then sudden footsteps alone. A pale stranger claimed stewardship, yet avoided Mara's questions entirely. She found fingerprints on the latch, smudged by salt air. Within, Hale's pocket held a key and folded map inside. Mara stared at the body, wondering who controlled time tonight.
created_at
"2026-03-18T11:16:10.601Z"
3/18/2026, 11:16:10 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3098
moderation_latency
(null)
generation_time
3368
tokens_prompt
46
tokens_completion
171
native_tokens_prompt
41
native_tokens_completion
676
native_tokens_completion_images
0
native_tokens_reasoning
528
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
usage
0.0008532
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_04c1580d728fac300169ba897ab24881969f590a5d233b8f9c"
is_byok
false
latency
233
model_permaslug
"openai/gpt-5.4-nano-20260317"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer
(null)
api_type
"completions"
id
"gen-1773832570-8iNP3SiSjilfKm0ufmGm"
upstream_id
"resp_04c1580d728fac300169ba897ab24881969f590a5d233b8f9c"
total_cost
0.0008532
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10