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Run: 2026-05-29-01KSSJY91MHBFYY6GQDX9E7GWH
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
9.3s
Cost:
$0.012690
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
95.99%
Matches word count
(details)
67.37%
Dialogue to Total Word Ratio
(details)
81.6792%
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 whispered. "We're doing this," Molly said. "Stealing presents from children." "From one child. Tristan. He's turning seven." "That's worse, somehow." "He's a horrible little boy, Bill. Bit my ankle at the supermarket last week." "And our plan is?" "You dress as the clown. I distract the parents with cake-related questions." "Why am I the clown?" "Because you have the face for it." "That's hurtful." "I packed you a wig." "What kind of wig?" "Rainbow. Very festive." "And the presents?" "You stuff them into the balloon bag while juggling." "I can't juggle." "Then learn, Bill. We've got nine minutes." "Nine minutes until what?" "Until the piñata. Everyone closes their eyes for the piñata. That's our window." "Why would they close their eyes?" "Safety. There's a bat involved." "This is insane." "This is genius. Now put on the nose." "It squeaks." "It's supposed to squeak." "Molly, there's a child watching us through the window." "Smile, Bill." "He's pointing at us." "Wave, Bill." "He's telling his mother." "Run, Bill." "What about the presents?" "Forget the presents! Grab the cake!" "Why the cake?" "Because I'm hungry and we've failed! Move!"
created_at
"2026-05-29T10:02:09.852Z"
5/29/2026, 10:02:09 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1187
moderation_latency
(null)
generation_time
9265
tokens_prompt
77
tokens_completion
361
native_tokens_prompt
93
native_tokens_completion
489
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
0.01269
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_014yddfth1j5S7o35Se4SMt7"
is_byok
false
latency
1187
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-1780048929-6KDl9726wEtqQAciVbtS"
session_id
(null)
api_type
"completions"
id
"gen-1780048929-ykWJmMjNabmaJWqVHRwL"
upstream_id
"msg_014yddfth1j5S7o35Se4SMt7"
total_cost
0.01269
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
95.99%
Matches word count
n/a
neededClean
false
words
192
67.37%
Dialogue to Total Word Ratio
Ratio: 97.93%, Deviation: 7.93%
neededClean
false
wordsTotal
193
wordsDialogue
189
81.6792%