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Run: 2026-06-01-01KT1G72Z87406MEZ56BZD7YM9
Run Details
Model:
Claude Opus 4.8 (Reasoning, Low)
Test:
Dialogue tags
Scenario:
Write 200 words with 50% dialogue
Duration:
10.3s
Cost:
$0.014940
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.74%
Matches word count
(details)
0.00%
Dialogue to Total Word Ratio
(details)
49.8722%
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 the crayon-stained paper. "This is the target," she announced. "The Henderson backyard. Birthday party. Forty-seven presents, minimum." Bill leaned closer, squinting. "Why is there a juice box stain on the security map?" "That's the bounce castle. We avoid it." "I love bounce castles." "Bill. Focus." She tapped the paper. "We go in dressed as clowns. Nobody suspects clowns." "Everybody suspects clowns," Bill muttered. "Clowns are terrifying. That's their whole thing." Molly ignored him. "While I distract the children with balloon animals, you load the presents into the van." "What van?" "The ice cream van." Bill brightened considerably. "We have an ice cream van?" "Borrowed. Don't ask." "And the parents?" "Sugar," Molly said darkly. "We bring an enormous cake. The kids go feral, the adults panic, and in the chaos—" "We grab the loot," Bill finished, grinning. "It's beautiful. It's genius. It's—" He paused. "Wait. Aren't we stealing from children?" Molly stared at him. "Bill, we robbed a bank last month." "That's different. Banks don't cry." "Children cry constantly. It changes nothing." He sighed, pulling on a red nose. "Fine. But I'm keeping the bounce castle." "Absolutely not." "Then I'm keeping the cake." She considered this. "Deal."
created_at
"2026-06-01T11:48:28.269Z"
6/1/2026, 11:48:28 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2686
moderation_latency
(null)
generation_time
10237
tokens_prompt
77
tokens_completion
417
native_tokens_prompt
93
native_tokens_completion
579
native_tokens_completion_images
(null)
native_tokens_reasoning
51
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
0.01494
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01JrvWBCvhKK1vGVkL2vJr3y"
is_byok
false
latency
1066
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-1780314508-bHeiolMxutFqmLJPgkMW"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1780314508-DIeMkTZ1PA3qOayhpB12"
upstream_id
"msg_01JrvWBCvhKK1vGVkL2vJr3y"
total_cost
0.01494
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
99.74%
Matches word count
n/a
neededClean
false
words
204
0.00%
Dialogue to Total Word Ratio
Ratio: 74.76%, Deviation: 24.76%
neededClean
false
wordsTotal
206
wordsDialogue
154
49.8722%