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Run: 2026-05-31-01KSYXSH8C2AWXBYFKZCW2EMDB
Run Details
Model:
Claude Opus 4.8 (Reasoning, High)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
10.6s
Cost:
$0.014490
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 crayon-drawn blueprint across the table. "The party starts at noon. That's when the bouncy castle goes up." "And that's our window?" Bill asked, peering at the smudged paper. "Precisely. While forty sugar-crazed seven-year-olds storm the piƱata, we slip in through the back gate dressed as clowns." Bill grimaced. "I'm not wearing the wig again. It makes me look unhinged." "You are unhinged, Bill. That's why I love working with you." She tapped the diagram. "The presents are stacked here, beside the cake. We grab everything in the gift pile and vanish before anyone notices." "What about the parents?" "Distracted. There's an open bar." Bill brightened considerably. "Now that's a detail I can support." "Focus," Molly snapped. "We've got ninety seconds to load the loot into the van." "And if a kid spots us?" "You hand them a balloon animal and walk away calmly." "I can't make balloon animals." "Then twist something vaguely dog-shaped and run." Bill sighed, studying the plan one last time. "You realize we're stealing from children?" "Spoiled children," Molly corrected, slipping on her oversized red nose. "Their parents will buy replacements by Tuesday." "Brilliant," Bill muttered, reaching reluctantly for the dreaded wig. "Absolutely brilliant."
created_at
"2026-05-31T11:48:00.921Z"
5/31/2026, 11:48:00 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3115
moderation_latency
(null)
generation_time
10525
tokens_prompt
77
tokens_completion
396
native_tokens_prompt
93
native_tokens_completion
561
native_tokens_completion_images
(null)
native_tokens_reasoning
50
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
0.01449
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_011fyozzqx2CkFQD4uWE79kt"
is_byok
false
latency
1451
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-1780228080-yIJGIWg9CuvTivtgBvTf"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780228080-Li9YlzhBI9U5xoFEVaJY"
upstream_id
"msg_011fyozzqx2CkFQD4uWE79kt"
total_cost
0.01449
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: 75.12%, Deviation: 25.12%
neededClean
false
wordsTotal
205
wordsDialogue
154
50.0000%