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Run: 2026-05-29-01KSSJZ3A13C2J4QSN3KJ6CQJR
Run Details
Model:
Claude Opus 4.8 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
12.4s
Cost:
$0.012915
Provider:
Anthropic
Evaluation summary
Score
Evaluator
Details Link
99.98%
Matches word count
(details)
100.00%
Dialogue to Total Word Ratio
(details)
99.9920%
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. "We're really doing this," Molly said. "Stealing presents. From children." "From a child. Singular. One spoiled birthday boy." "How old?" "Turning six." "Six!" Bill threw up his hands. "Molly, that's barbaric." "You robbed a retirement home last spring." "That was different. They were asleep." "And the kids will be distracted. There's a magician." "A magician?" Bill leaned forward. "Like, a good one?" "Focus, Bill." "I'm focusing! I'm just saying, if there's a magician—" "There's a piñata too." "Don't tempt me." "Look," Molly said, "we slip in through the garden gate at two. You're the clown." "Why am I the clown?" "Because you've got the face for it." "That's hurtful." "I distract the parents with the bounce house liability waiver. You load the gifts into the van." "And the cake?" "We are not taking the cake." "We're taking the cake." "Bill." "I want the cake, Molly." She sighed. "Fine. One slice." "The whole cake." "Half." "Deal." Bill grinned. "What about the goodie bags?" "Obviously the goodie bags." "Now you're speaking my language." He stood. "When do we leave?" "After lunch." "Can lunch be cake?" "We don't have the cake yet!" "Right. Details."
created_at
"2026-05-29T10:02:36.746Z"
5/29/2026, 10:02:36 AM
model
"anthropic/claude-4.8-opus-20260528"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4289
moderation_latency
(null)
generation_time
12348
tokens_prompt
77
tokens_completion
364
native_tokens_prompt
93
native_tokens_completion
498
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
0.012915
router
(null)
provider_responses
0
endpoint_id
"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id
"msg_01GtUZyUA6kNN1v5g4rW8bWf"
is_byok
false
latency
4289
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-1780048956-JxWsOhfNpEwDD8M09QQb"
session_id
(null)
api_type
"completions"
id
"gen-1780048956-nUWB75Qy82hM3pAfN8Iw"
upstream_id
"msg_01GtUZyUA6kNN1v5g4rW8bWf"
total_cost
0.012915
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
198
100.00%
Dialogue to Total Word Ratio
Ratio: 89.90%, Deviation: 0.10%
neededClean
false
wordsTotal
198
wordsDialogue
178
99.9920%