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Run: 2026-07-09-01KX41567X3N3SGEQNKQKN1FDP
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.4s
Cost:
$0.021298
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 stitched silver seams across Blackwater Manor as Detective Mara Venn arrived, carrying a warrant and an unwelcome memory inside. Inside, the annual masquerade had stopped mid-waltz, masks turning toward the library where Lord Harrow lay beneath shattered glass silently. His white fox mask concealed nothing now; a brass letter opener protruded from his chest like a grotesque invitation tonight. Guests whispered names, but Mara watched the butler, whose immaculate gloves were wet despite the fire's crackling warmth nearby inside. On the mantel, a stopped clock displayed eleven thirteen, while every witness insisted the scream had sounded at midnight precisely. Mara bent beside the body and found a smear of blue wax beneath Harrow's perfectly manicured fingernails there unmistakably fresh. Across the room, Lady Celia smiled behind her raven mask, although tears glittered along the knife-shaped pendant at her throat. Then the dead man's pocket watch chimed once, and every masked guest heard a child laughing somewhere beneath the floorboards.
created_at
"2026-07-09T18:10:06.215Z"
7/9/2026, 6:10:06 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
9541
moderation_latency
(null)
generation_time
10188
tokens_prompt
46
tokens_completion
281
native_tokens_prompt
41
native_tokens_completion
1413
native_tokens_completion_images
0
native_tokens_reasoning
1196
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
0.0212975
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_036ce99fc211b17f016a4fe3fe57288190b0e44387c38d2798"
is_byok
false
latency
246
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-1783620606-cnogu9Hb67KgC9Rk5MiC"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620606-uyDtH2B3ORdFgVoM6ySn"
upstream_id
"resp_036ce99fc211b17f016a4fe3fe57288190b0e44387c38d2798"
total_cost
0.0212975
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