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Run: 2026-05-29-01KSSJK9ER4WZ2KSY95CJ8VM4W
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 500 words with 30% dialogue
Duration:
20.8s
Cost:
$0.027640
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.92%
Matches word count
(details)
1.66%
Dialogue to Total Word Ratio
(details)
50.7898%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 500 word scene that has 30% 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 blueprint across the hood of the rusted sedan, smoothing the wrinkles with the flat of her palm. Bill leaned in, squinting at the crayon-drawn map that depicted a suburban backyard with alarming detail. "You drew this?" he asked. "My niece did. She's eight. Cost me a juice box and three fruit snacks." The map showed a bounce house, a folding table laden with gifts, and a creature labeled simply as "the clown." Molly tapped the table with her finger, her expression grim and businesslike, like a general surveying enemy fortifications before a doomed campaign. Bill scratched his stubble. The afternoon sun beat down on the parked car, and somewhere in the distance, the unmistakable shriek of overstimulated children pierced the air like a siren. "Walk me through it again," he said. "It's simple. We go in during cake time. Everyone's distracted, sugar-blind, half of them crying. The presents are stacked here, unguarded." She circled the table aggressively. "We grab the loot, we're out the back gate before anyone notices." "And the clown?" Molly's jaw tightened. "The clown is the variable." Bill straightened up, suddenly uneasy. He had robbed banks, casinos, and once a moderately guarded museum. But there was something about a children's birthday party that made his skin crawl in ways he couldn't articulate. "I don't like it," he admitted. "Last job, you said it'd be easy too. Then there was the dog." "That dog was a complication nobody could've predicted." "It ate my glove, Molly." "You have two hands. You have backup gloves." She rolled up the blueprint and tucked it into her jacket. "Focus. The presents at these parties? Premium stuff. Tablets, gift cards, those collectible card things the kids are obsessed with. We're talking four figures, easy." Bill considered this. He pictured a mountain of brightly wrapped boxes, each one a glittering promise of profit. His resolve hardened, then immediately softened again as a child wearing a paper crown sprinted past the car, screaming about pizza. "What if we get caught?" he whispered. "By who? A bunch of toddlers? You gonna let a six-year-old intimidate you?" "They travel in packs. They're fearless. They don't understand consequences." Molly grabbed him by the collar and pulled him close, her eyes burning with the focused intensity of a true professional. "Bill. Listen to me. We did the prep. We have the disguises." She gestured to the backseat, where two enormous panda costumes lay crumpled in a heap. "We blend in, we execute, we leave. Nobody suspects the entertainment." Bill looked at the panda suits. Then he looked at the party, where a banner reading HAPPY BIRTHDAY TYLER swayed gently in the breeze. "Why pandas?" he asked. "Tyler's theme is dinosaurs." Molly froze. Slowly, she turned to look at the banner, then back at the costumes, then back at the banner again. A long silence stretched between them, broken only by the distant pop of a balloon. "Get in the car," she said quietly. "Molly—" "Get in the car, Bill."
created_at
"2026-05-29T09:56:09.824Z"
5/29/2026, 9:56:09 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1752
moderation_latency
(null)
generation_time
20797
tokens_prompt
77
tokens_completion
800
native_tokens_prompt
93
native_tokens_completion
1087
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
0.02764
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_014Zu5ukwPtgrnGXzcPwz1Vz"
is_byok
false
latency
1745
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-1780048569-9rC13ZPeBpSCtPOEEdwl"
session_id
(null)
api_type
"completions"
id
"gen-1780048569-nUuWjd9Vp2JJ5jD6LjIp"
upstream_id
"msg_014Zu5ukwPtgrnGXzcPwz1Vz"
total_cost
0.02764
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
99.92%
Matches word count
n/a
neededClean
false
words
503
1.66%
Dialogue to Total Word Ratio
Ratio: 39.05%, Deviation: 9.05%
neededClean
false
wordsTotal
507
wordsDialogue
198
50.7898%