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Run: 2026-10-27-01M5YEAA12X5K98863Z3P9W9YD
Run Details
Model:
GPT-6.1 Terra (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
18.8s
Cost:
$0.008116
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
By the time the first bell rang, the snow had sealed every road leading to Blackthorn Hall and silenced everything. Inside, Detective Mara Vane stood before the library door, listening to a clock tick on the other side without interruption. The housekeeper had found it locked, but its only key lay visible through the keyhole, on the carpet just inside. A dark stain had begun to creep beneath the door, spreading slowly toward the hem of Mara’s borrowed dressing gown. Behind her, the guests gathered in silence, their faces pale and strangely uniform beneath the corridor’s flickering electric wall lamps. Lord Blackthorn’s son broke the quiet first, insisting that his father always worked alone and never admitted visitors after midnight. Mara noticed the fresh scratch across his cheek, then noticed his sister watching her notice it, smiling without any warmth. The butler brought an axe, and the first blow splintered the painted wood but failed to loosen the stubborn lock. On the third strike, the door swung inward, revealing Lord Blackthorn slumped over his desk, a knife in his back. The window was bolted, the fireplace cold, and a second cup of tea still steamed beside the dead man’s hand. Mara stepped inside, avoiding the blood, and saw that someone had written her name across the blotter in red ink. She had never met Lord Blackthorn, but she recognized the handwriting: it belonged to her mother, dead for twelve years.
created_at
"2026-10-27T10:25:55.341Z"
10/27/2026, 10:25:55 AM
model
"openai/gpt-6.1-terra-20261026"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
16251
moderation_latency
(null)
generation_time
18519
tokens_prompt
46
tokens_completion
496
native_tokens_prompt
41
native_tokens_completion
1615
native_tokens_completion_images
0
native_tokens_reasoning
1314
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
0.008116
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.22.1; linux; x64))"
http_referer
(null)
request_id
"req-1793096755-7nZ5irxgL1ipmrjc2wyY"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1793096755-gWG5p6tuiQ6I1cFCTQ4i"
upstream_id
"resp_0e4b2a253d52ee11016ae07c338dd887d188c7b97bf997ad71"
provider_responses
0
endpoint_id
"2d2ad10f-098e-4bbf-aa95-11f705b2b9a2"
id
"resp_0e4b2a253d52ee11016ae07c338dd887d188c7b97bf997ad71"
is_byok
false
latency
343
model_permaslug
"openai/gpt-6.1-terra-20261026"
provider_name
"OpenAI"
status
200
total_cost
0.008116
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
12
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20
10
20
11
20