Run: 2026-04-24-01KQ0G2P2Y174EPKSHMNPQAT48

Run Details

Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
3.5s
Cost:
$0.006125
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain fell on the cobblestones. Detective Mara lit her cigarette. The mansion loomed above her. Yellow tape fluttered in wind. A butler opened the door. His hands were visibly shaking. "She's upstairs," he whispered softly. Mara climbed the creaking staircase. Blood pooled beneath the chandelier. Lady Ashford lay motionless there. A silver letter opener glinted. It protruded from her chest. Seven guests waited downstairs silently. One of them killed her. Mara intended to find out. The storm had just begun.
created_at"2026-04-24T19:39:44.1Z" 4/24/2026, 7:39:44 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1231
moderation_latency(null)
generation_time3385
tokens_prompt46
tokens_completion172
native_tokens_prompt65
native_tokens_completion232
native_tokens_completion_images(null)
native_tokens_reasoning44
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
usage0.006125
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"2b1e3fcb-d4d6-4ab1-9a87-ed4938764c38"
is_byokfalse
latency694
model_permaslug"anthropic/claude-4.7-opus-20260416"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777059584-meEtz7UnPXNB3TBVjzdk"
session_id(null)
api_type"completions"
id"gen-1777059584-qcuMVsWa7t6DHwraQ8M2"
upstream_id"2b1e3fcb-d4d6-4ab1-9a87-ed4938764c38"
total_cost0.006125
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences16
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155