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Run: 2026-06-01-01KT1GQRJ5YRXTFTAQE2C3SR1N
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
10.0s
Cost:
$0.013215
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.98%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.9920%
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, knocking over a juice box she'd stolen earlier for research purposes. "The bouncy castle is our entry point," she said, jabbing the paper. "Nobody suspects a person crawling through inflatable walls." Bill frowned. "And the security?" "One clown. Maybe two." "Clowns terrify me, Molly." "That's the genius of it. They terrify everyone." She grinned. "We strike during pin-the-tail-on-the-donkey. Total chaos. Blindfolded children swinging wildly." Bill scribbled notes. "What about the cake?" "What about it?" "Do we take the cake?" Molly stared at him. "We're stealing presents, Bill. Focus." "I'm just saying, that's a lot of frosting to leave behind." He looked wounded. "I haven't eaten since the bake sale job." "Fine. You handle dessert acquisition. I'll bag the gifts." "Deal." Bill extended a sticky hand. "What's our exit?" "The piƱata distraction. When it bursts, candy rains down, kids scramble, and we vanish through the ball pit." "The ball pit?" Bill paled. "Do you know what's in those things?" "Riches, Bill. Glory." Molly rolled up the blueprints triumphantly. "And probably a lost shoe." He sighed, pocketing his pen. "I really hope it's a chocolate cake." "It's a children's party. It's always chocolate."
created_at
"2026-06-01T11:57:34.666Z"
6/1/2026, 11:57:34 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1098
moderation_latency
(null)
generation_time
9997
tokens_prompt
77
tokens_completion
348
native_tokens_prompt
93
native_tokens_completion
510
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
0.013215
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01TFHxRXRuv7Q5Qnp8SoAafj"
is_byok
false
latency
1098
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-1780315054-NLNSDzPthwXqlxnx3OmR"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780315054-grWkviLXhAv3S6fuCvFC"
upstream_id
"msg_01TFHxRXRuv7Q5Qnp8SoAafj"
total_cost
0.013215
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
198
0.00%
Dialogue to Total Word Ratio
Ratio: 72.91%, Deviation: 22.91%
neededClean
false
wordsTotal
203
wordsDialogue
148
49.9920%