NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-09-23-01M37Q6QZP816XK0142FM8PWCJ
Run Details
Model:
Claude Opus 5.5 (Reasoning)
Test:
Dialogue tags
Scenario:
Write 200 words with 90% dialogue
Duration:
15.4s
Cost:
$0.024880
Provider:
Claude Platform on AWS
Evaluation summary
Score
Evaluator
Details Link
95.99%
Matches word count
(details)
94.64%
Dialogue to Total Word Ratio
(details)
95.3120%
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
"Right, Bill. Saturday, two o'clock. Little Timmy Pemberton turns six." "Six? That's a lot of presents." "Forty-three RSVPs. I checked the Facebook." "How do we get in?" "Disguise. You're the clown." "Why am I always the clown?" "Because you already own the shoes." "Those are orthopedic, Molly." "They're red and enormous. Commit to it." "Fine. What are you?" "The magician. I make things disappear. Specifically, the gift table." "And the parents won't notice?" "Parents at a kids' party notice nothing. They're hiding in the kitchen drinking wine and pretending to enjoy themselves." "What about the kids?" "Distraction. You do balloon animals." "I can only do a snake." "Then do forty-three snakes. Very slowly." "What if a child sees you with the presents?" "I'll tell them it's part of the trick." "And the bouncy castle?" "What about it?" "I'm just saying, if there's a bouncy castle, I'm going on it." "Bill, we are professionals." "Professionals can bounce." "One bounce. After the presents are in the van." "Deal." Bill paused. "Molly, what if one of the presents is a puppy?" She stared at him for a long moment. "Then we keep the puppy, obviously."
created_at
"2026-09-23T18:07:20.076Z"
9/23/2026, 6:07:20 PM
model
"anthropic/claude-opus-5.5-20260921"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
5687
moderation_latency
(null)
generation_time
15386
tokens_prompt
75
tokens_completion
442
native_tokens_prompt
95
native_tokens_completion
1225
native_tokens_completion_images
(null)
native_tokens_reasoning
756
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
0.02488
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790186840-IOiAW8kM4ShDG9bfJp2y"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790186840-5pGY7kWiq75eAdqJxkY7"
upstream_id
"msg_011CfLpKwe2wx3Km2Dn2omHw"
provider_responses
0
endpoint_id
"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id
"msg_011CfLpKwe2wx3Km2Dn2omHw"
is_byok
false
latency
1792
model_permaslug
"anthropic/claude-opus-5.5-20260921"
provider_name
"Claude Platform on AWS"
status
200
total_cost
0.02488
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
95.99%
Matches word count
n/a
neededClean
false
words
192
94.64%
Dialogue to Total Word Ratio
Ratio: 94.85%, Deviation: 4.85%
neededClean
false
wordsTotal
194
wordsDialogue
184
95.3120%