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Run: 2026-05-31-01KSYXDNCEW4E9MDQ3PT96EE4P
Run Details
Model:
Claude Opus 4.8 (Reasoning, High)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
9.8s
Cost:
$0.012890
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.92%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.9606%
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 Bill's juice box. "Watch it," Bill grumbled, dabbing the wet paper with a napkin shaped like a dinosaur. "Focus. The party starts at two. We hit them during pin-the-tail." Bill squinted at the diagram. "Why is there a bounce castle marked as 'extraction point'?" "Because nobody suspects a man crawling out of a bounce castle," Molly said. "They will when I'm carrying forty presents." "That's why you wear the clown costume." Bill folded his arms. "I'm not wearing the clown costume." "Bill, we discussed this." "You discussed it. I screamed." Molly sighed and pointed at the floor plan. "The gifts are stacked here, by the cake. Single mother, distracted, thirty screaming children. It's the perfect storm." "It's a six-year-old's birthday." "Crime doesn't have an age limit." Bill picked at the dinosaur napkin. "What if they offer us cake?" "Then we take the cake too." "Molly, that's monstrous." "That's professional." He stared at her, then slowly nodded. "Fine. But I'm not doing the balloon animals." "You'll do whatever the disguise requires." "I can't even make a balloon dog!" "Then make a balloon disgrace," Molly snapped. "Just sell it." Bill reached for the clown wig, defeated.
created_at
"2026-05-31T11:41:31.931Z"
5/31/2026, 11:41:31 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
986
moderation_latency
(null)
generation_time
9717
tokens_prompt
77
tokens_completion
350
native_tokens_prompt
93
native_tokens_completion
497
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
0.01289
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01PjcPbanmMVoHvV9KaM8tTs"
is_byok
false
latency
986
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-1780227691-brsaApI3FMlbCR88rSKn"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780227691-2xdAXdnoWQ8aFJTAxDTB"
upstream_id
"msg_01PjcPbanmMVoHvV9KaM8tTs"
total_cost
0.01289
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
99.92%
Matches word count
n/a
neededClean
false
words
203
0.00%
Dialogue to Total Word Ratio
Ratio: 68.12%, Deviation: 18.12%
neededClean
false
wordsTotal
207
wordsDialogue
141
49.9606%