NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-06-01-01KT1G0EKGFSWBTVN219E5NKFT
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
9.8s
Cost:
$0.013465
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.38%
Matches word count
(details)
65.73%
Dialogue to Total Word Ratio
(details)
82.5513%
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 how do we get in?" Bill asked. "Simple. We dress as clowns," Molly said. "Clowns? I hate clowns." "Everyone hates clowns. That's the point. Nobody looks twice." "What about the kids?" "Kids love clowns." "You just said everyone hates clowns." "Adults hate clowns. Keep up, Bill." "And the presents?" "We stuff them in the balloon bag." "We don't have a balloon bag." "We'll make balloon animals as a distraction, then load the loot." "You can't make balloon animals." "I made a giraffe once." "That was a snake, Molly. It was clearly a snake." "It had a long neck!" "It had no legs!" "Details. Focus. We're in, we're out, we're rich." "Rich? They're children's presents. It's socks and crayons." "It's an upscale party, Bill. Think bicycles. Think gaming consoles." "Now you're talking." "There's a bouncy castle too." "What's that got to do with anything?" "Nothing. I just want to go on it." "We're professionals, Molly." "One bounce." "No bouncing." "Two minutes, tops." "Absolutely not." "Fine. But you're carrying the piñata." "Why are we taking a piñata?" "It's full of candy, Bill. Free candy." "You had me at free candy." "Knew you'd come around. Now grab your nose." "My what?" "Your clown nose. We're going in."
created_at
"2026-06-01T11:44:50.94Z"
6/1/2026, 11:44:50 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1294
moderation_latency
(null)
generation_time
9533
tokens_prompt
77
tokens_completion
369
native_tokens_prompt
93
native_tokens_completion
520
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
0.013465
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_014Brih8VeYBh6zBocpgp9PT"
is_byok
false
latency
1260
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-1780314291-hoTQ5gwr4tpCp00Roall"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780314291-CYcqucJwyo1shR7ikaWD"
upstream_id
"msg_014Brih8VeYBh6zBocpgp9PT"
total_cost
0.013465
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
65.73%
Dialogue to Total Word Ratio
Ratio: 98.05%, Deviation: 8.05%
neededClean
false
wordsTotal
205
wordsDialogue
201
82.5513%