NC Bench
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Run: 2026-02-16-01KHKAGKTF8S6GANS3XGCZ6KKW
Run Details
Model:
GPT-5 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
18.2s
Cost:
$0.000701
Provider:
OpenAI
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
Rain slicked the alley as the clock struck midnight sharply. A shadow lingered near the door, watching for unwary footsteps. Inside, a lamp flickered, casting pale echoes across polished surfaces. The victim lay unmoved, a note clenched within stiff fingers. Detective Mara approached quietly, cataloging clues with practiced, deliberate patience. The note hinted at betrayal, yet offered no clear motive. Outside, rain intensified; distant thunder forced the city to listen. Somewhere, a piano sighed, as secrets tucked themselves beneath shadows.
created_at
"2026-02-16T13:34:10.87086+00:00"
2/16/2026, 1:34:10 PM
model
"openai/gpt-5-nano-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3814
moderation_latency
(null)
generation_time
17857
tokens_prompt
46
tokens_completion
919
native_tokens_prompt
41
native_tokens_completion
1747
native_tokens_completion_images
0
native_tokens_reasoning
1600
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
0.00070085
router
(null)
provider_responses
0
id
"resp_0b878b4d55d3e94c0169931cc06a1081959fc059dea90d9fc3"
status
200
is_byok
false
latency
123
endpoint_id
"50329d77-04e1-4979-a184-c33030289476"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-nano-2025-08-07"
api_type
"completions"
id
"gen-1771248832-PtR1OeKYHJ85dmkQDBZb"
upstream_id
"resp_0b878b4d55d3e94c0169931cc06a1081959fc059dea90d9fc3"
total_cost
0.00070085
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10