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Run: 2026-05-31-01KSYXCSBXEQ16VVH7NSG6ES8P
Run Details
Model:
Claude Opus 4.8 (Reasoning, High)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
11.7s
Cost:
$0.015215
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
50.0000%
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 blueprints across the table, smoothing the crayon-drawn map they'd stolen from a kindergarten. "The party starts at noon," she said. "We hit the gift table during the piñata." Bill squinted at the diagram. "Why the piñata?" "Because every adult turns into a savage when candy rains from the sky. Total chaos. Nobody watches the presents." He nodded slowly, stroking his chin. "Brilliant. And the clown?" "Honkers? He's our inside man. Costs us forty bucks and a balloon animal." "You bribed a clown." "I bribed a professional," Molly corrected. "Now, you'll be disguised as Uncle Gary. Nobody questions an Uncle Gary." Bill held up the ill-fitting sweater she'd provided. "This smells like meatloaf and regret." "Authenticity, Bill. Commitment to the craft." He sighed dramatically. "And the getaway?" "Ice cream truck. I rented it. We blend right in, then drive off into the sunset playing 'Pop Goes the Weasel.'" "That song haunts my nightmares." "It'll haunt theirs too, when they realize little Timmy's mountain of gifts has vanished." Bill grinned, finally warming to the plan. "We're really doing this. Robbing a seven-year-old." "Not just any seven-year-old," Molly whispered, eyes gleaming. "The mayor's kid. The presents are practically luxury goods."
created_at
"2026-05-31T11:41:03.243Z"
5/31/2026, 11:41:03 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2670
moderation_latency
(null)
generation_time
11617
tokens_prompt
77
tokens_completion
403
native_tokens_prompt
93
native_tokens_completion
590
native_tokens_completion_images
(null)
native_tokens_reasoning
56
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
0.015215
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_013jw7DdJ6Pfq2jhgNTyPcw3"
is_byok
false
latency
1111
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-1780227663-YM7fDlUjzddP0p7SdSPa"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780227663-3SAzJaNXarmOnmbyqtot"
upstream_id
"msg_013jw7DdJ6Pfq2jhgNTyPcw3"
total_cost
0.015215
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
200
0.00%
Dialogue to Total Word Ratio
Ratio: 73.30%, Deviation: 23.30%
neededClean
false
wordsTotal
206
wordsDialogue
151
50.0000%