NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-06-01-01KT1H3HM19NZJZTM1MNPDF5VF
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
11.0s
Cost:
$0.013065
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.38%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.6885%
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 spread the blueprints across the table, knocking over a juice box. "The bounce house is our entry point, Bill. We tunnel underneath." "Tunnel? Molly, it's a backyard birthday, not Fort Knox." Bill scratched his head. "Why don't we just walk in the gate?" "Because there's security," she whispered dramatically. "It's a golden retriever wearing a party hat." Molly slammed her fist down. "That dog has seen things, Bill. He knows our faces." "We've never met the dog." "Exactly what he wants you to think." She pointed at a crayon-drawn map. "The presents are stockpiled here, near the piƱata. We grab everything during pin-the-tail-on-the-donkey, when they're blindfolded." Bill leaned forward, intrigued despite himself. "Okay, that's actually clever. But how do we get past the parents?" "Simple. You'll be dressed as a clown." "Absolutely not. I have a phobia." "You're afraid of clowns?" "I'm afraid of being one!" Bill crossed his arms. "Besides, last heist you made me wear a chicken suit." "And it worked beautifully." "I got pecked by actual chickens, Molly!" She sighed, sliding him a red rubber nose. "Look, do you want little Timmy's mountain of LEGO sets or not?" Bill paused, then grabbed the nose. "Fine. But I'm keeping the Millennium Falcon."
created_at
"2026-06-01T12:04:00.985Z"
6/1/2026, 12:04:00 PM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1500
moderation_latency
156
generation_time
10660
tokens_prompt
77
tokens_completion
343
native_tokens_prompt
93
native_tokens_completion
504
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)
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
0.013065
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_011uvuvJSN3R54xwyXRmmnp9"
is_byok
false
latency
1500
model_permaslug
"anthropic/claude-4.8-opus-20260528"
provider_name
"Anthropic"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer
(null)
request_id
"req-1780315440-CduHt2JAJrYrE8we2kix"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780315440-C0n4hkoEtVT4IoWMuyGh"
upstream_id
"msg_011uvuvJSN3R54xwyXRmmnp9"
total_cost
0.013065
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
99.38%
Matches word count
n/a
neededClean
false
words
205
0.00%
Dialogue to Total Word Ratio
Ratio: 73.93%, Deviation: 23.93%
neededClean
false
wordsTotal
211
wordsDialogue
156
49.6885%