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Run: 2026-07-09-01KX41E9XY4AMAK76BRRS5FK4Z
Run Details
Model:
GPT-5.6 Sol (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
29.9s
Cost:
$0.043645
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, Inspector Vale arrived at Blackthorn Manor, where thunder rattled windows and every clock displayed thirteen impossible minutes precisely. The butler waited beside a locked library door, clutching a silver tray stained with one perfect drop of blood, trembling. Inside, Lord Ashcombe sat upright at his desk, dead, while a fresh candle burned beneath the dripping chandelier without flickering. No weapon lay nearby, yet his right hand pointed accusingly toward a portrait that had been slashed across its eyes. Seven guests crowded the corridor, each claiming ignorance, although muddy footprints connected their rooms to the library terrace directly outside. Vale examined the corpse and found, tucked beneath its tongue, a tiny key engraved with tomorrow’s date and strange initials. Before anyone could speak, the telephone rang once, and a child’s voice whispered, “The second murder has already happened, Inspector.” Then the lights failed, and somewhere above them, a woman began laughing as a heavy body struck the floor hard.
created_at
"2026-07-09T18:15:04.905Z"
7/9/2026, 6:15:04 PM
model
"openai/gpt-5.6-sol-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
26960
moderation_latency
(null)
generation_time
29793
tokens_prompt
46
tokens_completion
277
native_tokens_prompt
41
native_tokens_completion
1448
native_tokens_completion_images
0
native_tokens_reasoning
1245
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
0.043645
router
(null)
provider_responses
0
endpoint_id
"a54c5de0-89bf-4ad7-a212-cf977eed918a"
id
"resp_04c93637ccc24b07016a4fe5291c3481969f0a6667dea7c864"
is_byok
false
latency
242
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-1783620904-4mBoNE8aO7VR8GQx4Ee3"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620904-ZNpv8jQTb6F0CdQrWMLn"
upstream_id
"resp_04c93637ccc24b07016a4fe5291c3481969f0a6667dea7c864"
total_cost
0.043645
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