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Run: 2026-05-29-01KSSK4CMHPK4MEE2B5NDCQV25
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
9.8s
Cost:
$0.012365
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.9999%
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 blueprints across the table, knocking over a half-eaten birthday cupcake she'd swiped as reconnaissance. "The bouncy castle is our biggest threat," she said, tapping the paper. "We go in at fourteen hundred hours, right when they cut the cake." Bill squinted. "Why then?" "Sugar rush. The kids will be feral. Total chaos. Nobody guards the present pile during cake time." "Brilliant." Bill stroked his chin. "But what about the parents?" "Distracted. Filming everything for social media." Molly grinned. "We'll be ghosts." Bill pulled out a clown costume from his duffel bag, holding it up proudly. "My disguise. Perfect cover." "Bill, the theme is *under the sea*. You'll stick out like a sore thumb." "A clown can be aquatic," he protested. "I'll say I'm a... a jellyfish." Molly pinched the bridge of her nose. "Just grab the loot and meet me at the swing set. Two minutes, tops." "What if a kid catches us?" "Then you improvise. Honk your nose. Make a balloon animal. Whatever it takes." Bill saluted, suddenly serious. "Molly, after twenty heists together, this feels different." "That's because," she sighed, zipping her bag, "we've never stolen from someone who fights back with juice boxes."
created_at
"2026-05-29T10:05:30.136Z"
5/29/2026, 10:05:30 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1306
moderation_latency
(null)
generation_time
9806
tokens_prompt
77
tokens_completion
327
native_tokens_prompt
93
native_tokens_completion
476
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
0.012365
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01DKkvgxxu5Ekg9djkPLLJbk"
is_byok
false
latency
1306
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-1780049130-b6T3JDHMcHNGCydyp2cc"
session_id
(null)
api_type
"completions"
id
"gen-1780049130-jWeLALsGKhi3rc3QcFDj"
upstream_id
"msg_01DKkvgxxu5Ekg9djkPLLJbk"
total_cost
0.012365
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
199
0.00%
Dialogue to Total Word Ratio
Ratio: 68.50%, Deviation: 18.50%
neededClean
false
wordsTotal
200
wordsDialogue
137
49.9999%