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Run: 2026-10-27-01M5YJ8YE3T2CE8A3FSGCZK5SQ
Run Details
Model:
GPT-6.1 Terra (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
14.1s
Cost:
$0.005896
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 first sign of trouble was the piano, playing softly in a house where everyone believed the pianist was dead. Detective Mara Voss stood beneath the dripping porch, listening as the final notes slipped through the storm and vanished abruptly. Inside, the guests had gathered around the library door, their candlelit faces pale with fear and something resembling guilty anticipation. Lord Ashcombe lay beyond it, sprawled across a Persian rug, with a silver letter opener buried beneath his left collarbone. The library windows were locked, the fireplace was cold, and the only key hung from a chain around his neck. Yet someone had placed a fresh white rose in his hand, its petals untouched by the blood soaking his sleeve. Mara knelt beside the body, noticing a thin crescent of wax beneath one fingernail and a smile upon his lips. Behind her, a woman whispered that the piano had played the same melody on the night Ashcombe buried his wife. Mara turned toward the music room, where the piano lid stood open and rainwater pooled beneath an empty wooden bench. Then, from somewhere upstairs, a woman’s voice called her name, followed by footsteps that stopped directly above the locked room.
created_at
"2026-10-27T11:35:04.91Z"
10/27/2026, 11:35:04 AM
model
"openai/gpt-6.1-terra-20261026"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4798
moderation_latency
(null)
generation_time
14088
tokens_prompt
46
tokens_completion
624
native_tokens_prompt
41
native_tokens_completion
1171
native_tokens_completion_images
0
native_tokens_reasoning
925
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
0.005896
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.22.1; linux; x64))"
http_referer
(null)
request_id
"req-1793100904-LnjlCvQb3hX97OH67Ek6"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1793100904-eMlRE73aqTn0YHUuMMib"
upstream_id
"resp_088ade05d354d9a0016ae08c68ffd487d1b084d68d2fcf097d"
provider_responses
0
endpoint_id
"2d2ad10f-098e-4bbf-aa95-11f705b2b9a2"
id
"resp_088ade05d354d9a0016ae08c68ffd487d1b084d68d2fcf097d"
is_byok
false
latency
765
model_permaslug
"openai/gpt-6.1-terra-20261026"
provider_name
"OpenAI"
status
200
total_cost
0.005896
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
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20