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Run: 2026-05-29-01KSSJJVHWBGTCEJRMAFVDD5XW
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
10.4s
Cost:
$0.012640
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.92%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.9595%
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 blueprint across the table, smoothing out a crease that suspiciously resembled a ketchup stain. "The bouncy castle is our weak point," she said, tapping the paper. "Security's gonna be tight." Bill leaned in, squinting. "Security? It's a six-year-old's birthday party, Molly." "Don't underestimate them. My nephew once bit a clown so hard the guy needed stitches." "And what exactly are we stealing again?" Molly grinned. "Presents. All of them. Wrapped, ribboned, and ours." "You want to rob children." Bill rubbed his temples. "We've hit banks, casinos, an art museum—and now we're swiping toys from toddlers?" "Think bigger. You know what kids get these days? Tablets. Gaming consoles. Designer sneakers in tiny sizes." Bill paused, intrigued despite himself. "How tiny are we talking?" "Resale value's still solid," she insisted. "Now, you'll dress as the magician." "Absolutely not." "You'll wear the top hat, you'll pull a rabbit, you'll distract the parents." Bill crossed his arms. "And where will you be?" "Sneaking out the back with a garbage bag full of loot, obviously." He sighed, defeated. "This is a new low, even for us." Molly slapped his shoulder cheerfully. "Bill, every great career needs a piñata."
created_at
"2026-05-29T09:55:55.591Z"
5/29/2026, 9:55:55 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1422
moderation_latency
123
generation_time
10202
tokens_prompt
77
tokens_completion
337
native_tokens_prompt
93
native_tokens_completion
487
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
0.01264
router
(null)
provider_responses
0
endpoint_id
"dfc0e5bd-d703-4fe2-a7bb-655eb95d5441"
id
"msg_01DduzRU2gTv8zWgaJpmaNmS"
is_byok
false
latency
1422
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-1780048555-zgZz1HMVYrgWOFqPXuNs"
session_id
(null)
api_type
"completions"
id
"gen-1780048555-jE2qe9OWh6SzFK49g9bQ"
upstream_id
"msg_01DduzRU2gTv8zWgaJpmaNmS"
total_cost
0.01264
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
197
0.00%
Dialogue to Total Word Ratio
Ratio: 74.37%, Deviation: 24.37%
neededClean
false
wordsTotal
199
wordsDialogue
148
49.9595%