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Run: 2026-10-27-01M5YJ5PVTKHX25JTNANHN7NB1
Run Details
Model:
GPT-6.1 Terra (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
12.4s
Cost:
$0.005281
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
The fog had swallowed Blackthorn Manor before Detective Mara Voss discovered the first footprint on its freshly polished hall floor. It pointed toward the library, where a grandfather clock had stopped at midnight and someone had left the door ajar. Inside, Lord Blackthorn lay beneath his portrait, a silver letter opener buried deeply in the dark velvet of his waistcoat. His eyes stared at the ceiling, but his right hand clasped a chess piece carved from remarkably pale, smooth bone. Mara knelt beside him, noticing that the white queen was warm, although the body had already begun to grow cold. Behind her, the butler cleared his throat and said the household had gathered for dinner precisely an hour earlier tonight. Nobody had entered the library since, he insisted, while his gaze drifted toward the portrait hanging above his murdered employer. Mara followed his eyes and saw a fresh slit in the canvas, directly over the painted heart of Lord Blackthorn. Then, from somewhere inside the wall, a woman began to laugh, and the butler dropped his candle onto the floor.
created_at
"2026-10-27T11:33:18.853Z"
10/27/2026, 11:33:18 AM
model
"openai/gpt-6.1-terra-20261026"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4304
moderation_latency
(null)
generation_time
12340
tokens_prompt
46
tokens_completion
658
native_tokens_prompt
41
native_tokens_completion
1048
native_tokens_completion_images
0
native_tokens_reasoning
826
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
0.005281
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.22.1; linux; x64))"
http_referer
(null)
request_id
"req-1793100798-nAgvs0ZrMLa5irz8ipko"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1793100798-tRSXx34P7DmNT1W1aj8W"
upstream_id
"resp_079203ccd4093371016ae08bfef28c87d1a476545ab76a4d36"
provider_responses
0
endpoint_id
"2d2ad10f-098e-4bbf-aa95-11f705b2b9a2"
id
"resp_079203ccd4093371016ae08bfef28c87d1a476545ab76a4d36"
is_byok
false
latency
334
model_permaslug
"openai/gpt-6.1-terra-20261026"
provider_name
"OpenAI"
status
200
total_cost
0.005281
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
9
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20