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Run: 2026-05-31-01KSYXAA7DJX6JSSZ5TDSTDCGP
Run Details
Model:
Claude Opus 4.8 (Reasoning, High)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
9.6s
Cost:
$0.012215
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.9995%
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 the crayon drawings. "This is the layout?" Bill squinted. "It's a child's drawing of a unicorn." "It's the back of the layout, genius. Flip it over." He turned the paper around. "Right. So we go in through the bounce house?" "Obviously through the bounce house. Nobody suspects the bounce house." Bill scratched his chin. "What about the clown? He looked dangerous." "That clown is seventy-two years old, Bill. His name is Gerald. He has a hip replacement." "Clowns terrify me. Always have." Molly rolled her eyes. "The presents are stacked by the cake table. We grab them during pin-the-tail-on-the-donkey, when everyone's blindfolded." "Genius," Bill whispered. "But how do we carry forty gift bags?" "We bring the piƱata. Hollow it out, stuff it full, walk right out the front door." "Won't they hit it with a stick?" She paused. "That's a fair point, actually." "See? I think things through." "Fine. We use the magician's disappearing box instead. Saw it in half, fill both halves with loot." Bill grinned, finally satisfied. "I love it when a plan comes together." "It's not together yet. You're wearing the bunny costume." "Absolutely not." "It's already decided, Bill."
created_at
"2026-05-31T11:39:42.201Z"
5/31/2026, 11:39:42 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1022
moderation_latency
(null)
generation_time
9516
tokens_prompt
77
tokens_completion
341
native_tokens_prompt
93
native_tokens_completion
470
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
0.012215
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_0143fFvQNjzmE4U5sanu7kbk"
is_byok
false
latency
1022
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-1780227582-hPkO8vIornvhKA08LEdL"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780227582-1V3envSYUqeKSr1xwtnn"
upstream_id
"msg_0143fFvQNjzmE4U5sanu7kbk"
total_cost
0.012215
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
0.00%
Dialogue to Total Word Ratio
Ratio: 83.09%, Deviation: 33.09%
neededClean
false
wordsTotal
207
wordsDialogue
172
49.9995%