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Run: 2026-05-29-01KSSJZS3BC6E220CA2T8230VV
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 500 words with 70% dialogue
Duration:
20.8s
Cost:
$0.028565
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
12.61%
Dialogue to Total Word Ratio
(details)
56.3038%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 500 word scene that has 70% 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 crayon-drawn map across the table, smoothing it flat with her palm. "Okay, so the perimeter is guarded by what's-his-name, the clown," she said. "Bongo." "Bongo the Magnificent," Bill corrected. "He's not magnificent, Bill. He does balloon animals." "He does an *incredible* giraffe. I've seen footage." Molly stared at him. "Where does one acquire footage of a children's party clown?" "Don't worry about it." Bill leaned over the map. "Point is, Bongo's the only real threat. The rest are six-year-olds hopped up on cake." "Which is exactly why this is dangerous," Molly said. "Sugar makes them unpredictable. One minute they're crying, the next they're biting your ankles." "So we go in fast. Through here." Bill tapped a scribbled rectangle. "The patio doors." "Those are French doors." "They're patio doors with delusions of grandeur. I can pick them in nine seconds." "And the presents?" "Stacked by the cake table. Gift bags, wrapped boxes, the works. We grab the lot, out the back, into the van." Bill grinned. "Easiest hundred grand we'll ever make." Molly frowned. "How is a pile of presents worth a hundred grand?" "Have you *seen* what kids get these days? Tablets. Smartwatches. There's a rumor the birthday boy's getting a pony." "We are not stealing a pony, Bill." "I'm just saying, if there's a pony—" "We don't have a pony plan!" "I always have a pony plan." Bill pulled a second piece of paper from his jacket. It was, in fact, a detailed pony plan. Molly pressed her fingers to her temples. "Let's focus. What about the parents?" "Distracted. There's a piñata at three o'clock. Maximum chaos. Nobody's watching the loot when there's free candy raining from the ceiling." "And our exit if it goes wrong?" "Disguises." Bill reached into a duffel bag and produced two enormous foam costumes. Molly's mouth fell open. "Are those... Teletubbies?" "Nobody questions a Teletubby at a kid's party. We blend in. We walk out. We disappear." "I am not wearing the purple one." "Fine, you're the green one." "I don't *want* to be the green one either, Bill! I want to be a thief with my dignity intact!" "Dignity doesn't pay the bills, Molly. Tinky Winky does." She slumped back in her chair. "I cannot believe my life has come to robbing toddlers in a foam suit." "Hey." Bill placed a hand on her shoulder, suddenly tender. "We robbed a casino last year. A *casino*, Molly. And we got nothing because you insisted on tipping the dealer." "He was a single father!" "This is redemption. This is us getting back on top. And all we have to do is outsmart a clown and some kids in party hats." Molly looked at the map. At the pony plan. At the green Teletubby costume. "If Bongo so much as touches me," she said quietly, "I will not be responsible for my actions." Bill smiled and zipped up the bag. "That's my girl. Now grab your antenna. We've got a party to crash."
created_at
"2026-05-29T10:02:59.083Z"
5/29/2026, 10:02:59 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1166
moderation_latency
(null)
generation_time
20782
tokens_prompt
77
tokens_completion
787
native_tokens_prompt
93
native_tokens_completion
1124
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
0.028565
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01JBec65ESqXbxBvywhQN6RX"
is_byok
false
latency
1166
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-1780048979-4B5QU24eLwRvOMWkfYuk"
session_id
(null)
api_type
"completions"
id
"gen-1780048979-nX4022BMDouWVt3BEgbz"
upstream_id
"msg_01JBec65ESqXbxBvywhQN6RX"
total_cost
0.028565
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
words
500
12.61%
Dialogue to Total Word Ratio
Ratio: 76.44%, Deviation: 6.44%
neededClean
false
wordsTotal
505
wordsDialogue
386
56.3038%