Run: 2026-09-29-01M3P2DQ65C8JBPZ7C0BQXWABZ

Run Details

Duration:
18.0s
Cost:
$0.026524
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
90.00% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered Blackwood Manor on the night Lord Ashby died. Inspector Mara Finch arrived near midnight, her coat soaked through. The butler waited in the foyer, pale and visibly trembling. Lord Ashby lay face-down, a dagger buried in his back. Mara knelt beside him and noticed the window was locked. Every door and window had been bolted from the inside. Someone in this house had killed him, and remained here. Mara turned to the butler and asked who found him. "I did, madam, at eleven, and the clock had stopped." Mara glanced at the clock, frozen at ten past nine. Someone wanted the murder to seem earlier than it was.
created_at"2026-09-29T07:52:45.002Z" 9/29/2026, 7:52:45 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3665
moderation_latency(null)
generation_time17987
tokens_prompt46
tokens_completion517
native_tokens_prompt62
native_tokens_completion2640
native_tokens_completion_images(null)
native_tokens_reasoning2415
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"
service_tier"default"
usage0.026524
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668365-KcWDzL5ZfidzudVPjB80"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668365-w8LxuygYVwYa3eINImBC"
upstream_id"msg_011CfXNKDSnofrdFhA6MoJME"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNKDSnofrdFhA6MoJME"
is_byokfalse
latency668
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.026524
cache_discount(null)
upstream_inference_cost0
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
90.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
310
410
510
610
710
820
910