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Run: 2026-07-09-01KX40GCXZE7FGA6WYS5W44531
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.3s
Cost:
$0.019557
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 as Detective Mara Venn arrived, carrying a damp invitation and an instinctive distrust of wealthy hosts. Inside, eleven guests watched the grandfather clock, whose brass hands trembled strangely at precisely midnight beside the silent dining fireplace. Their host, Sir Alistair Quill, had promised revelations concerning an old disappearance and several inconvenient inheritances before serving supper tonight. Instead, the lights failed, the clock chimed once, and someone screamed behind the locked library door for no apparent reason. When candles flared, Quill lay sprawled beneath his portrait, a silver letter opener buried deeply beneath his left rib cage. Nobody had entered or left, according to the butler, although every guest suddenly remembered hearing something different during the blackout. Mara knelt beside the corpse, noticing mud on Quill's cuffs and one missing pearl from Lady Fane's necklace that evening. Then the dead man's pocket watch began ticking, though its cracked face showed an hour yet to come for everyone. Outside, thunder concealed the sound of a carriage departing, leaving fresh wheel tracks beneath the eastern windows in wet gravel. Mara looked toward them, then at the guests, and understood the murderer had planned for her arrival from the beginning.
created_at
"2026-07-09T17:58:44.935Z"
7/9/2026, 5:58:44 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
9528
moderation_latency
(null)
generation_time
10065
tokens_prompt
46
tokens_completion
352
native_tokens_prompt
41
native_tokens_completion
1297
native_tokens_completion_images
0
native_tokens_reasoning
1034
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
0.0195575
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_0b14fbafd5a0a4c6016a4fe1550050819597eea6d736d0247b"
is_byok
false
latency
207
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-1783619924-lV5sQXtQd8Kw0pvokym1"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619924-iVuGFgNZrUIpUyycaq39"
upstream_id
"resp_0b14fbafd5a0a4c6016a4fe1550050819597eea6d736d0247b"
total_cost
0.0195575
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
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20