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Run: 2026-06-01-01KT1HRJ830KAA06NR246ZFWN3
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 500 words with 50% dialogue
Duration:
20.2s
Cost:
$0.026915
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
81.27%
Matches word count
(details)
0.01%
Dialogue to Total Word Ratio
(details)
40.6430%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 500 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 blueprint across the dashboard, smoothing out the wrinkles with a gloved hand. "Okay, walk me through it one more time." Bill sighed, fogging up the binoculars. "We've been over this six times." "Indulge me. We're professionals." "Are we, though?" He lowered the binoculars and gestured toward the suburban house, where a clown was currently juggling. "Because professionals don't usually target a seven-year-old's birthday party." Molly pointed an accusing finger at him. "That seven-year-old is the son of a hedge fund manager. Those presents are top-tier. We're talking premium electronics, possibly a pony." "You can't steal a pony, Molly." "I can steal anything, Bill. That's the whole point of being a thief." Bill rubbed his temples. "Fine. The plan. Again." "You go in dressed as the second clown—" "Why is there a second clown?" "There's always a second clown at these things. It's a status symbol." She tapped the blueprint. "While you distract the children with balloon animals, I slip in through the back, grab the loot, and we rendezvous at the bouncy castle." Bill stared at her. "I don't know how to make balloon animals." "How hard can it be? Twist, twist, dog." "That's not—" He stopped himself. "And what if a kid asks for something complicated? Like a giraffe?" "Then you make a long dog and call it a giraffe. Children are idiots, Bill. That's their entire charm." A burst of laughter erupted from the party as the first clown produced a bouquet from his sleeve. Bill watched, unimpressed. "This feels morally questionable," he said quietly. Molly turned to face him fully. "We robbed a retirement home last month." "That was different." "How?" "Those people had lived full lives! This kid hasn't even hit double digits!" "Which means he has more birthdays ahead of him. Plenty of time to recover." She handed him a red rubber nose. "Put this on." Bill held the nose between two fingers like it was radioactive. "I want it on the record that I objected to this." "Noted. Now objection-clown, get in there." He climbed out of the van, squeezing the nose onto his face. Molly rolled down the window. "Bill. Remember—stay in character." "I don't have a character!" "You're Sprinkles. A clown who's seen things. Go." Bill trudged across the lawn, his oversized shoes flopping against the grass. A small child immediately latched onto his leg. "Are you here for the magic?" the boy asked. Bill looked back at the van, where Molly gave him an enthusiastic thumbs up. "Sure, kid," he muttered. "I'm here for the magic." Twenty minutes later, Molly's earpiece crackled. "Molly, we have a situation." "Did you get the presents?" "I got something better. They made me employee of the month. There's a certificate. And cake." "Bill. Focus." A pause. Then, softly: "The cake is really good, Molly." She closed her eyes and counted to ten. "I'm coming in. Save me a slice."
created_at
"2026-06-01T12:15:29.544Z"
6/1/2026, 12:15:29 PM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1114
moderation_latency
(null)
generation_time
20205
tokens_prompt
77
tokens_completion
790
native_tokens_prompt
93
native_tokens_completion
1058
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
0.026915
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01BsPNF72ExDFnZVAszQMwTJ"
is_byok
false
latency
1114
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-1780316129-l2dFbR5Yiu1HUwTsP6X8"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780316129-KkB10wNfqwc6Td3EcvF1"
upstream_id
"msg_01BsPNF72ExDFnZVAszQMwTJ"
total_cost
0.026915
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
81.27%
Matches word count
n/a
neededClean
false
words
488
0.01%
Dialogue to Total Word Ratio
Ratio: 63.36%, Deviation: 13.36%
neededClean
false
wordsTotal
494
wordsDialogue
313
40.6430%