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Run: 2026-07-09-01KX41DARDZQHBT9QBA067ESKM
Run Details
Model:
GPT-5.6 Sol (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
13.4s
Cost:
$0.040285
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 midnight, the grandfather clock stopped, and every guest in Blackthorn Hall heard a single gunshot beneath the winter storm. Inspector Mara Venn arrived before dawn, carrying a leather case, three pencils, and an inconvenient suspicion about the grieving widow. Sir Alistair lay beside the locked library door, his white dinner jacket blooming crimson across one perfectly pressed silken lapel. No weapon appeared nearby, although a silver dueling pistol rested upstairs inside a cabinet whose key remained in Alistair’s pocket. The widow watched Mara examine the body, twisting her wedding ring whenever thunder rattled the portraits along the shadowed corridor. Near Alistair’s hand, Mara discovered a chess knight carved from bone, damp with seawater and smelling faintly of bitter almonds. Everyone denied recognizing it, yet the butler crossed himself, and Lady Blackthorn suddenly asked whether breakfast would be further delayed. Mara closed her case and smiled, because innocent households rarely contained corpses, secrets, and four different accounts of that midnight.
created_at
"2026-07-09T18:14:32.979Z"
7/9/2026, 6:14:32 PM
model
"openai/gpt-5.6-sol-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
11928
moderation_latency
(null)
generation_time
13233
tokens_prompt
46
tokens_completion
284
native_tokens_prompt
41
native_tokens_completion
1336
native_tokens_completion_images
0
native_tokens_reasoning
1125
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
0.040285
router
(null)
provider_responses
0
endpoint_id
"a54c5de0-89bf-4ad7-a212-cf977eed918a"
id
"resp_01f762c54488dab9016a4fe5090ad08193bc014c2c4cfa8d67"
is_byok
false
latency
211
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-1783620872-BU0eEFiyorouFbOUyhyW"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620872-TuzhDIIDqcBNwhYhM6kB"
upstream_id
"resp_01f762c54488dab9016a4fe5090ad08193bc014c2c4cfa8d67"
total_cost
0.040285
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