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Run: 2026-04-24-01KQ0GAB5G19K3SYVP5D04Z46J
Run Details
Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
16.4s
Cost:
$0.073050
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The rain fell in silver sheets across the cobblestones of Ashgrove Lane, drumming steadily against the windows of number forty-seven. Detective Margaret Holloway arrived just past midnight, her long trench coat heavy with water and her patience thinner than usual. The front door stood slightly ajar, a thin ribbon of yellow light spilling onto the wet stone of the porch. Inside, the grand foyer smelled of old roses, expensive cigars, and something much darker that she recognized far too well. Sir Edmund Cavanaugh lay sprawled beneath the crystal chandelier, a silver letter opener buried deep within his embroidered silk waistcoat. Margaret knelt beside the body, gloved fingers hovering above the wound, reading the scene like a page of familiar text. Five guests remained trapped inside by the storm, and one of them, she knew already, had just committed cold murder.
created_at
"2026-04-24T19:43:55.059Z"
4/24/2026, 7:43:55 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2573
moderation_latency
(null)
generation_time
16311
tokens_prompt
46
tokens_completion
396
native_tokens_prompt
65
native_tokens_completion
2909
native_tokens_completion_images
(null)
native_tokens_reasoning
177
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"
usage
0.07305
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"8585c4bf-8869-40d4-8c88-cf3e77078e2a"
is_byok
false
latency
858
model_permaslug
"anthropic/claude-4.7-opus-20260416"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer
(null)
request_id
"req-1777059835-lSTj4L9AjvrEw95S6uTS"
session_id
(null)
api_type
"completions"
id
"gen-1777059835-mRweUTMU4ixIN1D3I3hv"
upstream_id
"8585c4bf-8869-40d4-8c88-cf3e77078e2a"
total_cost
0.07305
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20