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Run: 2026-06-01-01KT1GP4CQSQCN1NWNH84ZZTYM
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
10.8s
Cost:
$0.012990
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.98%
Matches word count
(details)
65.86%
Dialogue to Total Word Ratio
(details)
82.9203%
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. "Robbing a six-year-old?" "His name is Tristan, and he's turning seven," Molly said. "Oh, well, that changes everything." "Look, the kid's parents are loaded. You see the gift table? PlayStations, drones, probably bonds." "Bonds? At a birthday party?" "Rich people are weird, Bill." "And the plan?" "You distract them. Magic show. I sweep the loot into the van." "I don't know magic, Molly." "You pulled a quarter out of my nephew's ear last Christmas." "That was an accident! It fell out of my sleeve!" "Perfect. Improvise." "What if they ask for balloon animals?" "Then make a balloon animal." "I can only make snakes." "A snake is an animal, Bill." "It's a deflated balloon with a sad face drawn on it." "Kids love that postmodern stuff." "And if it goes wrong?" "It won't go wrong." "You said that about the bakery." "The bakery had a guard dog!" "It had a poodle named Cupcake!" "Cupcake bit you, Bill." "Cupcake drew blood, Molly!" "Focus. Clown costume's in the bag. Put the nose on." "This nose smells like cheese." "That's the previous clown." "What happened to the previous clown?" "Don't ask questions you don't want answered. Now go juggle."
created_at
"2026-06-01T11:56:41.243Z"
6/1/2026, 11:56:41 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1220
moderation_latency
(null)
generation_time
10752
tokens_prompt
77
tokens_completion
350
native_tokens_prompt
93
native_tokens_completion
501
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
0.01299
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01TR7WEd4KyomHViPQzdDmV9"
is_byok
false
latency
1220
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-1780315001-osGI30ZjrFaTxnMqFNYA"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780315001-72PkiztBuDhiUkdu949Y"
upstream_id
"msg_01TR7WEd4KyomHViPQzdDmV9"
total_cost
0.01299
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
99.98%
Matches word count
n/a
neededClean
false
words
202
65.86%
Dialogue to Total Word Ratio
Ratio: 98.04%, Deviation: 8.04%
neededClean
false
wordsTotal
204
wordsDialogue
200
82.9203%