NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-06-01-01KT1HB1WC0P7QGXJ4Q0RSWSWX
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
10.2s
Cost:
$0.013065
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.98%
Matches word count
(details)
66.12%
Dialogue to Total Word Ratio
(details)
83.0529%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 200 word scene that has 90% 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
"So we're really doing this?" Bill asked. "We're really doing this," Molly said. "Stealing presents. From children." "From spoiled children." "How do you know they're spoiled?" "It's a birthday party, Bill. Nobody throws a party for a humble kid." "That's not—okay, what's the plan?" "You dress as the clown. I'm the magician." "Why do you get to be the magician?" "Because I can do card tricks." "I can do card tricks!" "Bill, you dropped the whole deck at Denny's last week." "That was nerves." "Anyway, while you're juggling, I make the presents disappear." "Into what?" "My magic trunk. Big enough for forty gift bags." "Forty? How many kids are coming?" "Twelve." "Twelve kids have forty presents?" "It's the Hendersons. Rich. Overcompensating." "I feel bad already." "Bill." "What? They're children, Molly. Little tiny children with little tiny faces." "Those little tiny faces have iPads worth more than your car." "...How many iPads?" "At least six." "Okay, I'm in. But I'm not wearing the clown nose." "You're wearing the clown nose." "It squeaks!" "That's the point. Distraction." "Fine. But if one kid cries, we abort." "Deal." "And we leave the cake." "...Why would we take the cake?" "I just want the cake, Molly."
created_at
"2026-06-01T12:08:06.802Z"
6/1/2026, 12:08:06 PM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1637
moderation_latency
(null)
generation_time
10208
tokens_prompt
77
tokens_completion
367
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_01EbuSeVXQ2WUDMS1vWKnaBg"
is_byok
false
latency
1637
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-1780315686-ciuBJveDxCKEKemEFJSz"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780315686-jYgNADU6S0gbUdJQU9Rd"
upstream_id
"msg_01EbuSeVXQ2WUDMS1vWKnaBg"
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
99.98%
Matches word count
n/a
neededClean
false
words
202
66.12%
Dialogue to Total Word Ratio
Ratio: 98.02%, Deviation: 8.02%
neededClean
false
wordsTotal
202
wordsDialogue
198
83.0529%