NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-09-23-01M37Q2X84T32081Q2PPK24DCS
Run Details
Model:
Claude Opus 5.5 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
21.7s
Cost:
$0.039320
Provider:
Claude Platform on AWS
Evaluation summary
Score
Evaluator
Details Link
75.16%
Matches word count
(details)
98.63%
Dialogue to Total Word Ratio
(details)
86.8927%
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
"Okay, Bill, run it back," Molly said, tapping the crayon map. "We go in as clowns." "Nobody hires two clowns, Bill." "Budget cuts. We say one of us is the understudy." "And the presents?" "Stacked on the gift table by the bouncy castle. Forty, maybe fifty boxes. Little Timmy's turning seven." "How do we get fifty boxes out?" "Balloon animals. I make a giraffe, everyone looks up, you grab the loot." "You can't make a giraffe." "I can make a long balloon. Context does the rest." "What about the mother? She's got eyes like a hawk." "That's why we bring the piƱata. Stuffed with confetti." "Bill, why would confetti distract her?" "Have you ever cleaned up confetti? She'll be gone for hours." Molly rubbed her temples. "And the getaway?" "Ice cream truck. Borrowed it from my cousin." "Does it still play music?" "Only 'Greensleeves.' On loop. Can't turn it off." "So we're escaping at eleven miles an hour, broadcasting our location?" "Nobody suspects the ice cream man, Molly." "Everybody suspects the ice cream man, Bill." Bill paused, then brightened. "Fine. We steal the bouncy castle too. Deflated, it fits in the freezer." "Bill, that's the worst plan you've ever had." "You said that about the petting zoo." "We got arrested by a goat."
created_at
"2026-09-23T18:05:14.391Z"
9/23/2026, 6:05:14 PM
model
"anthropic/claude-opus-5.5-20260921"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
6081
moderation_latency
(null)
generation_time
21683
tokens_prompt
75
tokens_completion
571
native_tokens_prompt
95
native_tokens_completion
1947
native_tokens_completion_images
(null)
native_tokens_reasoning
1422
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
0.03932
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790186714-sKHeeo74uHanK0kX7H4f"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790186714-MxZzBXaETTky6WIe7DIM"
upstream_id
"msg_011CfLpAgSjYpvS5K2DtaCFy"
provider_responses
0
endpoint_id
"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id
"msg_011CfLpAgSjYpvS5K2DtaCFy"
is_byok
false
latency
1843
model_permaslug
"anthropic/claude-opus-5.5-20260921"
provider_name
"Claude Platform on AWS"
status
200
total_cost
0.03932
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
75.16%
Matches word count
n/a
neededClean
false
words
213
98.63%
Dialogue to Total Word Ratio
Ratio: 93.43%, Deviation: 3.43%
neededClean
false
wordsTotal
213
wordsDialogue
199
86.8927%