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Run: 2026-06-01-01KT1G9YW59RD7DM7J8JCMH6QV
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 200 words with 10% dialogue
Duration:
10.1s
Cost:
$0.014515
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.98%
Matches word count
(details)
83.01%
Dialogue to Total Word Ratio
(details)
91.4988%
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 hedge, binoculars trained on the bouncy castle wobbling in the suburban backyard. Streamers fluttered. A clown honked something menacing. She adjusted her balaclava, which she'd insisted on wearing despite the eighty-degree heat, sweat pooling dramatically beneath the wool. Bill, beside her, was disguised as a magician, complete with a top hat that kept sliding over his eyes. He clutched a duffel bag labeled, inexplicably, EVIDENCE. The gift table sat twenty feet away, a glorious mountain of glitter-wrapped boxes catching the sun like buried treasure. "That table's the vault," Molly whispered. He nodded gravely, producing a foam sword from his sleeve and immediately stabbing himself in the thigh. The plan was elegant. Bill would distract the children with sleight of hand—he knew exactly two tricks, one involving a coin, the other involving panic. Molly would slip behind the snack station, commandeer the wagon used for hauling juice boxes, and load it with plunder. They'd exit through the side gate, blending seamlessly into the neighborhood as two ordinary adults fleeing a birthday party with a child's wagon full of stolen Legos. Bill swallowed hard, eyeing the piñata swinging overhead like a noose. "For the loot," he murmured. Molly grinned.
created_at
"2026-06-01T11:50:02.381Z"
6/1/2026, 11:50:02 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2577
moderation_latency
(null)
generation_time
10082
tokens_prompt
77
tokens_completion
402
native_tokens_prompt
93
native_tokens_completion
562
native_tokens_completion_images
(null)
native_tokens_reasoning
66
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
0.014515
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01Txg4Z6agzdgfFkxLNUVHbD"
is_byok
false
latency
960
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-1780314602-xjuwhq3ItLT2N1vUV8RQ"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780314602-UsNyLRWkW26ke7Mf0ss8"
upstream_id
"msg_01Txg4Z6agzdgfFkxLNUVHbD"
total_cost
0.014515
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
99.98%
Matches word count
n/a
neededClean
false
words
202
83.01%
Dialogue to Total Word Ratio
Ratio: 3.43%, Deviation: 6.57%
neededClean
false
wordsTotal
204
wordsDialogue
7
91.4988%