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Run: 2026-04-24-01KQ0P8802JM9FTYMWQSCC2CTG
Run Details
Model:
GPT-5.5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
9.4s
Cost:
$0.016555
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain stitched silver threads across Blackmoor Manor's windows after midnight. Detective Mara Voss arrived alone, carrying coffee and old suspicions. Inside, the grandfather clock had stopped at twelve forty-seven precisely. Lord Ashcombe lay beneath it, smiling with bloodless surprise forever. An ivory dagger pinned his confession to the carpet below. Yet every signature on the page belonged to someone else. The household waited in the library, breathing dust and fear. Mara noticed one chair empty, still warm, facing the fire.
created_at
"2026-04-24T21:27:37.74Z"
4/24/2026, 9:27:37 PM
model
"openai/gpt-5.5-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
8953
moderation_latency
(null)
generation_time
9199
tokens_prompt
46
tokens_completion
413
native_tokens_prompt
41
native_tokens_completion
545
native_tokens_completion_images
0
native_tokens_reasoning
436
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"
usage
0.016555
router
(null)
provider_responses
0
endpoint_id
"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id
"resp_02755f9f5944e3e90169ebe049d64881909813c94550111876"
is_byok
false
latency
315
model_permaslug
"openai/gpt-5.5-20260423"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer
(null)
request_id
"req-1777066057-56wDLmTXYZuFbABHYn90"
session_id
(null)
api_type
"completions"
id
"gen-1777066057-8FJ7ZOM9zGpVuv8DRbAI"
upstream_id
"resp_02755f9f5944e3e90169ebe049d64881909813c94550111876"
total_cost
0.016555
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10