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Run: 2026-07-09-01KX40Z0ZPRZRN32DHEJ1EF46R
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
18.6s
Cost:
$0.032082
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
93.44%
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 polished the cobblestones as Inspector Vale arrived at Blackthorn Manor, summoned by a telephone call that ended abruptly at midnight. The butler waited beneath the portico, clutching a silver candlestick, while thunder concealed unfamiliar footsteps approaching outside the manor tonight. Inside, guests huddled around the library fire, their faces pale beneath portraits of ancestors who seemed equally suspicious and watchful. Lord Blackthorn lay sprawled beside his desk, an ivory knife lodged neatly between his shoulder blades without blood on it. No window stood open, no door showed damage, and every guest insisted they had remained together during dinner downstairs tonight. Vale noticed a wet footprint beside the corpse, pointing inward, although everyone claimed the storm had begun much later outside.
created_at
"2026-07-09T18:06:44.223Z"
7/9/2026, 6:06:44 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
16997
moderation_latency
(null)
generation_time
18142
tokens_prompt
46
tokens_completion
217
native_tokens_prompt
41
native_tokens_completion
2132
native_tokens_completion_images
0
native_tokens_reasoning
1972
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
0.0320825
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_079dfc46f5975e84016a4fe33499408196a87c8fa2069a9a43"
is_byok
false
latency
210
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-1783620404-Fo5SaZf4xi6yluREEKbl"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620404-G4poE8tAdVxlQfLMSYui"
upstream_id
"resp_079dfc46f5975e84016a4fe33499408196a87c8fa2069a9a43"
total_cost
0.0320825
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
93.44%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
21
1
20
2
20
3
20
4
20
5
20