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Run: 2026-09-23-01M37PF2XBY3WTQJZ9VB5EPB5F
Run Details
Model:
Claude Opus 5.5 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
21.1s
Cost:
$0.038520
Provider:
Claude Platform on AWS
Evaluation summary
Score
Evaluator
Details Link
99.38%
Matches word count
(details)
99.89%
Dialogue to Total Word Ratio
(details)
99.6328%
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
Molly slapped the blueprint onto the kitchen table. "Bill, the party starts at two. Bouncy castle, magician, forty screaming seven-year-olds." "And the presents?" "Stacked on a table by the patio door. Unguarded." "Nothing's unguarded, Molly. There'll be a mum. There's always a mum." "That's why you're going in as the clown." "Why am I the clown?" "You already own the shoes." "Those are orthopaedic." "They're red and enormous, Bill." "Fine. What do I do?" "Balloon animals. Distract them. I slip through the hedge, load the van, gone before cake." "I can only make one balloon animal." "Which one?" "The snake." "The snake is just a balloon." "It's a very convincing snake." "Make forty snakes, then." "What if a kid asks for a giraffe?" "Tell him it's a snake with ambition." "And the magician?" "Gerald. Seventy-three. Hard of hearing. No threat." "What if he makes me disappear?" "Bill, if he could make things disappear, he'd be doing our job." Bill chewed his pencil thoughtfully. "One problem. What's our exit if something goes wrong?" "Something won't go wrong." "But if it does?" "Then we run." "In the shoes?" Molly stared at him. "Wear trainers under the shoes." "Molly, that's genius." "I know. That's why I'm the planner."
created_at
"2026-09-23T17:54:24.827Z"
9/23/2026, 5:54:24 PM
model
"anthropic/claude-opus-5.5-20260921"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4880
moderation_latency
(null)
generation_time
21111
tokens_prompt
75
tokens_completion
599
native_tokens_prompt
95
native_tokens_completion
1907
native_tokens_completion_images
(null)
native_tokens_reasoning
1394
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
0.03852
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790186064-52whWUWIYYRqEVwW69GM"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790186064-UvaBwzQdMavQjwZQSfXi"
upstream_id
"msg_011CfLoLoATkqH7QncgwtSgF"
provider_responses
0
endpoint_id
"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id
"msg_011CfLoLoATkqH7QncgwtSgF"
is_byok
false
latency
1240
model_permaslug
"anthropic/claude-opus-5.5-20260921"
provider_name
"Claude Platform on AWS"
status
200
total_cost
0.03852
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Claude Platform on AWS"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
99.38%
Matches word count
n/a
neededClean
false
words
205
99.89%
Dialogue to Total Word Ratio
Ratio: 91.83%, Deviation: 1.83%
neededClean
false
wordsTotal
208
wordsDialogue
191
99.6328%