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Run: 2026-05-29-01KSSK2AR7N1DJN96XC3C94YV7
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 10% dialogue
Duration:
12.5s
Cost:
$0.012215
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.74%
Matches word count
(details)
86.94%
Dialogue to Total Word Ratio
(details)
93.3417%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 200 word scene that has 10% 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 crouched behind the bouncy castle, binoculars pressed to her face, surveying the chaos of frosting-smeared children and exhausted parents. The presents glittered on a folding table, a mountain of glossy wrapping paper and curled ribbons begging to be liberated. Bill wormed his way beside her, dragging an enormous sack and breathing heavily through his clown mask. "Why are you dressed like that?" Molly hissed. He shrugged, the red nose squeaking. "Camouflage." She rolled her eyes and returned to her surveillance. The birthday boy, a tyrant of perhaps six years, ruled his domain with a plastic sword, knighting subjects and demanding tribute. A piñata swung ominously from an oak branch, its papier-mâché belly stuffed with reconnaissance opportunities. The plan was elegant in its simplicity. During the cake ceremony, while every eye fixed on flickering candles, they would sweep the table clean and vanish into the suburban afternoon. Molly checked her watch. The mother was already lighting matches, cupping the flame against the breeze. Children gathered like moths. "Now," she whispered. Bill stood too quickly, tripped over his oversized shoes, and tumbled directly into the bouncy castle, which deflated with a sound like a dying accordion. Forty children turned to stare. Molly closed her eyes.
created_at
"2026-05-29T10:04:22.769Z"
5/29/2026, 10:04:22 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2954
moderation_latency
(null)
generation_time
12154
tokens_prompt
77
tokens_completion
347
native_tokens_prompt
93
native_tokens_completion
470
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
0.012215
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
is_byok
false
latency
221
model_permaslug
"anthropic/claude-4.8-opus-20260528"
provider_name
"Anthropic"
status
429
1
endpoint_id
"dfc0e5bd-d703-4fe2-a7bb-655eb95d5441"
id
"msg_011Jzd7WgSCKRC5aq1sAiFHe"
is_byok
false
latency
2944
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-1780049062-9DnZcxffSrF2cWaT0Zs9"
session_id
(null)
api_type
"completions"
id
"gen-1780049062-4heAnRlWjBUjCMCXgscg"
upstream_id
"msg_011Jzd7WgSCKRC5aq1sAiFHe"
total_cost
0.012215
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
99.74%
Matches word count
n/a
neededClean
false
words
204
86.94%
Dialogue to Total Word Ratio
Ratio: 3.88%, Deviation: 6.12%
neededClean
false
wordsTotal
206
wordsDialogue
8
93.3417%