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Run: 2026-07-09-01KX406H79NAQ3MS0WWPJ8AZ7G
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
15.6s
Cost:
$0.034197
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 hammered Blackthorn Manor while Inspector Vale arrived, carrying a sodden invitation and a profound distrust of midnight callers outside. The butler admitted him, then pointed toward the library, where seven guests waited together beside an unlit fireplace in silence. At their center, Sir Alistair Crowe reclined beneath his portrait, smiling as though death had already entertained him that evening. Then lightning revealed the bloodstain spreading across the carpet directly beneath the locked study door behind the guests waiting silently. Nobody noticed the clock stop until Vale bent down and found a silver cufflink embedded within the crimson fibers there. Its engraved initial matched Crowe's name, yet the corpse's sleeves displayed plain black buttons not matching silver cufflinks at all. Before Vale could question anyone, a scream rose from upstairs, followed by the unmistakable sound of shattered glass in darkness. The butler paled, and every guest turned toward the staircase, except Sir Alistair Crowe, who had vanished from his chair.
created_at
"2026-07-09T17:53:21.65Z"
7/9/2026, 5:53:21 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
14924
moderation_latency
(null)
generation_time
15216
tokens_prompt
46
tokens_completion
281
native_tokens_prompt
41
native_tokens_completion
2273
native_tokens_completion_images
0
native_tokens_reasoning
2060
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
0.0341975
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_0ec1eb9a633359d6016a4fe011bac08194a739edacc41070f1"
is_byok
false
latency
227
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-1783619601-391MirzuGmVA6N9yARLm"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619601-ot1dzdE4vqAk6hTmFFkC"
upstream_id
"resp_0ec1eb9a633359d6016a4fe011bac08194a739edacc41070f1"
total_cost
0.0341975
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