NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-09-29-01M3P2FZ5HC88VJNZQSS69CSGA
Run Details
Model:
Claude Sonnet 5.5 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
8.9s
Cost:
$0.010840
Provider:
Claude Platform on AWS
Evaluation summary
Score
Evaluator
Details Link
95.99%
Matches word count
(details)
38.18%
Dialogue to Total Word Ratio
(details)
67.0846%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 200 word scene that has 50% words of dialogue between two thieves named Molly and Bill who are planning to break into a children's party to steal all the presents. Only include the prose of the scene without any markdown or commentary.
Model response
Messages
Meta
AI
Molly crouched behind the hedge, binoculars pressed to her eyes. Across the lawn, a bouncy castle shaped like a unicorn wobbled in the breeze. "Forty kids," she whispered. "Twelve parents. One clown." "I hate clowns," Bill said, adjusting his balaclava. It was pink. It had been the only one left at the shop. "Focus. The presents are on the table by the cake. In eleven minutes they sing Happy Birthday, and everyone stares at the candles." "Why are we robbing a six-year-old?" "Because her father owes me money, Bill, and he never pays. Also, she's getting a pony-shaped tablet. I've seen the list." Bill frowned. "How do we get past the clown?" "You distract him." "With what?" "Balloon animals. You're going to challenge him to a balloon-off." "I can't make balloon animals." "Then make him feel inadequate. Improvise." Bill sighed, cracked his knuckles, and eyed the unicorn castle. "What if the kids see me?" "You're wearing pink and standing next to a unicorn. They'll think you're part of the show." A tiny voice piped up behind them. "Are you the entertainment?" They turned. A girl in a tiara held out a juice box. "Yes," Molly said smoothly. "This is Balloon Bill." Bill groaned and accepted the juice box.
created_at
"2026-09-29T07:53:58.711Z"
9/29/2026, 7:53:58 AM
model
"anthropic/claude-sonnet-5.5-20260928"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3414
moderation_latency
(null)
generation_time
8861
tokens_prompt
75
tokens_completion
438
native_tokens_prompt
95
native_tokens_completion
1065
native_tokens_completion_images
(null)
native_tokens_reasoning
584
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
"end_turn"
service_tier
"default"
usage
0.01084
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1790668438-atHuFEEZ9zy5eAmnwMSi"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790668438-cf78ZprnjiA1lq9AMAiZ"
upstream_id
"msg_011CfXNQeTq1LnfNqeQcJJhE"
provider_responses
0
endpoint_id
"99aaad94-923b-4fc1-b763-271ed5486f7a"
id
"msg_011CfXNQeTq1LnfNqeQcJJhE"
is_byok
false
latency
646
model_permaslug
"anthropic/claude-sonnet-5.5-20260928"
provider_name
"Claude Platform on AWS"
status
200
total_cost
0.01084
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Claude Platform on AWS"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
95.99%
Matches word count
n/a
neededClean
false
words
208
38.18%
Dialogue to Total Word Ratio
Ratio: 59.91%, Deviation: 9.91%
neededClean
false
wordsTotal
212
wordsDialogue
127
67.0846%