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Run: 2026-07-09-01KX400QCBYVEZ8AAMVRG4HFT1
Run Details
Model:
GPT-5.6 Sol (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
13.1s
Cost:
$0.033175
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
At dawn, the lighthouse bell rang thirteen times, though storms had severed its rusted rope three nights earlier without explanation. Inspector Mara Vale arrived by ferry, carrying one suitcase, two warrants, and a letter addressed in her own shaky handwriting. The islanders waited silently beside the pier, each wearing black gloves despite the bright and strangely warm October morning sunlight. Behind them, Gull House stood locked against the cliffs, its highest window glowing like an unblinking, watchful amber human eye. Inside, Sir Edmund Rook lay dead at breakfast, his silver spoon balanced carefully across his open, bloodless mouth like scales. No footprints marked the dusty floor, but seawater dripped steadily from the chandelier onto yesterday’s untouched newspaper below his chair. Mara opened the letter, and one sentence beneath her signature made every watching islander step backward together in sudden fear. “You have until sunset to prove which of us murdered him, because tonight the bell will name its next victim.”
created_at
"2026-07-09T17:50:11.347Z"
7/9/2026, 5:50:11 PM
model
"openai/gpt-5.6-sol-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
8269
moderation_latency
(null)
generation_time
12904
tokens_prompt
46
tokens_completion
397
native_tokens_prompt
41
native_tokens_completion
1099
native_tokens_completion_images
0
native_tokens_reasoning
897
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
0.033175
router
(null)
provider_responses
0
endpoint_id
"a54c5de0-89bf-4ad7-a212-cf977eed918a"
id
"resp_0f986a17f6c224dd016a4fdf5369a481908643135ceb755ddb"
is_byok
false
latency
214
model_permaslug
"openai/gpt-5.6-sol-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-1783619411-4GkJ4vTuYYszp5hNR2Iq"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619411-dxowPQ22AAoihBDFRlN9"
upstream_id
"resp_0f986a17f6c224dd016a4fdf5369a481908643135ceb755ddb"
total_cost
0.033175
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