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Run: 2026-05-31-01KSYXGJ8GSVCZR0BK0ETQENRP
Run Details
Model:
Claude Opus 4.8 (Reasoning, High)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
9.8s
Cost:
$0.013290
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 Timmy Henderson's seventh birthday. Estimated haul: twenty presents, minimum." "Twenty?" Bill leaned forward, eyes gleaming. "What's the security situation?" "One clown, possibly intoxicated. Three overprotective mothers. And a piñata." "The piñata's a non-issue." "The piñata is always an issue, Bill." Molly tapped the map. "Remember the Wilson job?" Bill shuddered, rubbing his shoulder. "I still can't lift my arm above my head." "Exactly. So here's the plan. You go in dressed as Uncle Gary. Nobody questions Uncle Gary." "Why am I always the uncle?" "Because you have the face of a disappointing relative." Molly slid him a fake mustache. "I'll create a diversion at the bounce castle." "What kind of diversion?" "The catastrophic kind." Bill pressed the mustache to his lip. "And the extraction?" "Minivan. Side door. We're gone before they finish singing Happy Birthday." "That song's surprisingly long when sung by toddlers." "Which is precisely why it's our window." Molly stood, pulling on her sunglasses. "Any questions?" Bill examined himself in the mirror, adjusting the mustache. "Just one. Do we feel bad about this?" "They're seven, Bill. They won't even remember." He nodded solemnly. "For the children."
created_at
"2026-05-31T11:43:07.037Z"
5/31/2026, 11:43:07 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1108
moderation_latency
(null)
generation_time
9722
tokens_prompt
77
tokens_completion
355
native_tokens_prompt
93
native_tokens_completion
513
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
0.01329
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01Buzr7SHwRd8ANXn3rGbang"
is_byok
false
latency
1108
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-1780227787-yqkUVuUpjCZwSIOrlPVX"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780227787-1ehOSneD06FSCqpaUL0y"
upstream_id
"msg_01Buzr7SHwRd8ANXn3rGbang"
total_cost
0.01329
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
199
0.00%
Dialogue to Total Word Ratio
Ratio: 73.13%, Deviation: 23.13%
neededClean
false
wordsTotal
201
wordsDialogue
147
49.9995%