NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
Dialogue tags
Scenario
Write unattributed dialogue
Run ID
2026-02-08-01KGYZW53X78D2T4G3MPB61RHW
Model input
User/Human
You are an expert novel writer in the cozy mystery genre. Write a scene of about 200 words, with dialogue between two characters. The dialogue should be unattributed, meaning the speaker is not explicitly mentioned. The scene should be set in a small town bakery. Only return the story, nothing else.
Model response
Messages
Meta
AI
The bell above the bakery door chimed as powdered sugar drifted through the morning light. "I heard you were the last person to see Martha before she disappeared." "Who told you that?" "Does it matter? Were you?" "I sold her a loaf of sourdough on Thursday evening, same as always. She mentioned something about finally taking that trip to visit her sister." "Martha doesn't have a sister." "Well, that's what she said. Why are you asking me all these questions anyway?" "Because her cat hasn't been fed in three days, her mail is piling up, and her front door was wide open this morning." "Maybe she left in a hurry." "Maybe. Or maybe someone wants us to think she left. What else did she say?" "Nothing much. She seemed nervous, kept looking out the window. Said she was expecting someone." "Did you see who?" "No, I had customers. But when I looked up from wrapping Mrs. Chen's croissants, Martha was already gone." "And the sourdough?" "Still sitting on the counter. She never took it." The morning light seemed suddenly colder, and the sweet smell of fresh bread couldn't quite mask the bitter taste of worry.
created_at
"2026-02-08T16:03:15.277409+00:00"
Sunday, February 8th, 2026 at 4:03:15 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1288
moderation_latency
149
generation_time
6785
tokens_prompt
61
tokens_completion
251
native_tokens_prompt
77
native_tokens_completion
282
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.004461
router
(null)
provider_responses
0
id
"3bd3f1cd-c738-4b76-86e1-635ceb029586"
status
200
is_byok
false
latency
1287
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770566587-OhzXL29iCbEUGreqkBAL"
upstream_id
"3bd3f1cd-c738-4b76-86e1-635ceb029586"
total_cost
0.004461
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Count dialogue tags
n/a
neededClean
false
dialogueTags
(empty)