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Run: 2026-05-29-01KSSK4220CK8CF4TRMSF82JWZ
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
11.3s
Cost:
$0.013765
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
98.71%
Matches word count
(details)
52.04%
Dialogue to Total Word Ratio
(details)
75.3761%
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 said. "Robbing a kid's birthday party." "Not robbing. Liberating gifts from spoiled children." "Molly, there's a bouncy castle." "Tactical advantage. Nobody suspects the bouncy castle." "How is a bouncy castle a tactical advantage?" "It's not. I just want to jump on it." "Focus. What's the plan?" "Simple. You distract the parents, I grab the loot pile." "How do I distract them?" "You're the entertainment. Bill the Magnificent." "I don't do magic." "You'll learn. Pull a rabbit out of something." "Out of where?" "Don't make it weird, Bill." "And the kids? There's like thirty of them." "Sugar-crashed by three o'clock. We strike during cake." "What if they cry?" "Then we've won. Crying children can't pursue." "This feels morally questionable." "It's a piñata, Bill. We're basically just an unscheduled piñata." "That doesn't make sense." "Neither does gifting a six-year-old a tablet. We're correcting society." "You're insane." "I'm aspirational. Now, the getaway car?" "An ice cream truck." "Brilliant. Nobody chases the ice cream truck." "Actually they chase it constantly." "Then drive faster. Are you in or out?" "...What's the cut?" "Sixty-forty." "Sixty me?" "Forty you. I'm doing the bouncy castle." "Deal."
created_at
"2026-05-29T10:05:19.306Z"
5/29/2026, 10:05:19 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1320
moderation_latency
(null)
generation_time
11219
tokens_prompt
77
tokens_completion
372
native_tokens_prompt
93
native_tokens_completion
532
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
0.013765
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_011VpmfhLkKD3A1GmaNb7vxP"
is_byok
false
latency
1320
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-1780049119-NidOY3DjoFHKM4o9RvdY"
session_id
(null)
api_type
"completions"
id
"gen-1780049119-gUuf363b3BdbUYchutjb"
upstream_id
"msg_011VpmfhLkKD3A1GmaNb7vxP"
total_cost
0.013765
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
98.71%
Matches word count
n/a
neededClean
false
words
194
52.04%
Dialogue to Total Word Ratio
Ratio: 98.99%, Deviation: 8.99%
neededClean
false
wordsTotal
198
wordsDialogue
196
75.3761%