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Run: 2026-05-31-01KSYXHJ8NFY9Q8AFZ2BHVP1KE
Run Details
Model:
Claude Opus 4.8 (Reasoning, High)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
10.3s
Cost:
$0.012640
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.9995%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 200 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 crayon-drawn map across the table. "The target is a bouncy castle, Bill. Pure tactical nightmare." "I don't like clowns," Bill muttered, polishing his crowbar. "They've got dead eyes." "Focus. The presents are stacked here, by the cake. We grab them during pin the tail on the donkey." Bill frowned. "What about the parents?" "Distracted. Drinking boxed wine, pretending they're not exhausted." She tapped the map. "We blend in. You're Uncle Gary, I'm a magician they double-booked." "I can't do magic, Molly." "Pull a coin from a kid's ear. They're easily impressed." Bill considered this. "What if someone wants a balloon animal?" "Then you make a balloon animal, Bill!" "I'll make a snake," he said proudly. "It's just a long balloon you don't twist." Molly pinched the bridge of her nose. "Fine. The snake works. After the cake, we load the loot into the van marked 'Petting Zoo.'" "There's no actual animals?" "There's no actual zoo, Bill. It's a disguise." He looked genuinely disappointed. "I really wanted to pet something." "You can pet your share of the profits." She rolled up the map. "Now repeat the plan." Bill grinned. "Coin trick, snake balloon, steal birthday joy from children." "Beautiful."
created_at
"2026-05-31T11:43:39.809Z"
5/31/2026, 11:43:39 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
986
moderation_latency
(null)
generation_time
10296
tokens_prompt
77
tokens_completion
335
native_tokens_prompt
93
native_tokens_completion
487
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
0.01264
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01SvqeAn5mAqCnndX6hSsMLx"
is_byok
false
latency
986
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-1780227819-5KHz2CjMjT230q7xCkhb"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780227819-FA9CrzKFKUX4Lk4qOz35"
upstream_id
"msg_01SvqeAn5mAqCnndX6hSsMLx"
total_cost
0.01264
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
words
201
0.00%
Dialogue to Total Word Ratio
Ratio: 78.33%, Deviation: 28.33%
neededClean
false
wordsTotal
203
wordsDialogue
159
49.9995%