NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-07-09-01KX405SMGX59PK6Y1GYV74NX6
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
8.7s
Cost:
$0.017698
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
Messages
Meta
AI
Rain tapped the manor windows while Inspector Vale studied the body sprawled beneath the chandelier in the silent ballroom alone. Everyone claimed they heard nothing, yet muddy footprints crossed the marble floor from the locked garden door to the victim. Lady Harrow stood nearest, clutching a torn glove, her pale smile reflected strangely in the darkened mirror beside her face. The clock struck midnight again, though Vale had watched its hands stop precisely when the old financier died at nine. Outside, thunder swallowed a woman's scream, and every guest turned toward the corridor where the servants had vanished moments earlier. Vale knelt beside the corpse, noticing a silver key clenched tightly inside the dead man's bloodless left hand still warm. Then the lights failed, and in darkness someone whispered, “Inspector, you should inspect your own pocket carefully before dawn arrives.” When candles returned, the key was gone, and a fresh crimson stain marked Vale's immaculate white cuff near its button.
created_at
"2026-07-09T17:52:57.496Z"
7/9/2026, 5:52:57 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
7958
moderation_latency
(null)
generation_time
8496
tokens_prompt
46
tokens_completion
272
native_tokens_prompt
41
native_tokens_completion
1173
native_tokens_completion_images
0
native_tokens_reasoning
971
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
service_tier
"default"
usage
0.0176975
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_0eec0f502e03a72f016a4fdff990708193a7292cbd7b21dde6"
is_byok
false
latency
239
model_permaslug
"openai/gpt-5.6-terra-20260709"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer
(null)
request_id
"req-1783619577-l6JjSBQKcwDT8F3nZIoG"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619577-kxH8E5GDaIuiUj68zKMZ"
upstream_id
"resp_0eec0f502e03a72f016a4fdff990708193a7292cbd7b21dde6"
total_cost
0.0176975
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
response_cache_source_id
(null)
data_region
"global"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20