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Run: 2026-05-29-01KSSK30660H9DREATBK3T7S5P
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
10.3s
Cost:
$0.012590
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
66.26%
Dialogue to Total Word Ratio
(details)
83.1276%
Overall
Model input
User/Human
You are a author of comedic heist books. Please write a 200 word scene that has 90% 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
"So we're really doing this?" Bill asked. "Stealing presents from a kid's party? Absolutely," Molly said. "That's low. Even for us." "You robbed a nursing home last Tuesday." "They had excellent jewelry. This is different. These are children." "Spoiled children. The Hendersons rent ponies, Bill. Ponies." "What's the plan?" "You dress as a clown. I'll be the magician." "Why do I have to be the clown?" "Because you've got the face for it." "That's hurtful." "You'll distract the kids with balloon animals while I make the presents disappear." "I can't make balloon animals." "Then make balloon blobs. Children are stupid, they won't notice." "And the loot?" "We stuff everything into my magician's trunk. Then I announce my grand finale, the vanishing act, and we vanish." "With forty birthday presents." "Now you're getting it." "What if there's cake?" "What about it?" "I want some." "Bill, we're committing a crime, not attending a party." "A man can multitask." "Fine. Grab cake. But only after the presents are secured." "Deal. One question." "What?" "What if the birthday kid cries?" "Then we've succeeded. Tears mean we got everything." "You're a monster, Molly." "I'm a professional. Now put on the nose." "It squeaks." "That's the point."
created_at
"2026-05-29T10:04:44.625Z"
5/29/2026, 10:04:44 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1813
moderation_latency
(null)
generation_time
10303
tokens_prompt
77
tokens_completion
367
native_tokens_prompt
93
native_tokens_completion
485
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
0.01259
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01WxJhEC7UcpAKEpBkif1XMK"
is_byok
false
latency
1813
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-1780049084-na92mvsL0CmC155qZNTX"
session_id
(null)
api_type
"completions"
id
"gen-1780049084-3hvLtx6GNw1WqT8d7VZV"
upstream_id
"msg_01WxJhEC7UcpAKEpBkif1XMK"
total_cost
0.01259
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
201
66.26%
Dialogue to Total Word Ratio
Ratio: 98.01%, Deviation: 8.01%
neededClean
false
wordsTotal
201
wordsDialogue
197
83.1276%