Model

Claude Sonnet 4.5

Test

Data extraction

Scenario

Contextual pronoun

Run ID

2026-02-08-01KGYZNMG6GJWW8MJKJ4WXHP41

Model input

User/Human
Who does "he" refer to in the last sentence? Only return the name. Tom and Jerry were playing in the yard. Spike, the dog, was watching them from his kennel. Suddenly, he started barking loudly.

Model response

AI
Spike
created_at"2026-02-08T15:59:36.02219+00:00" Sunday, February 8th, 2026 at 3:59:36 PM GMT+00:00
model"anthropic/claude-4.5-sonnet-20250929" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1355
moderation_latency368
generation_time1444
tokens_prompt45
tokens_completion1
native_tokens_prompt58
native_tokens_completion5
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/" 
is_byokfalse
finish_reason"stop" 
native_finish_reason"stop" 
usage0.000249
router(null)
provider_responses
0
id"f469ecdd-e60a-46f1-a4f9-9085e02ba8f6" 
status200
is_byokfalse
latency1354
endpoint_id"d8bee848-f020-454a-b2be-4a7ce868f99f" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.5-sonnet-20250929" 
api_type"completions" 
id"gen-1770566373-1WOnETtkEHkkFFjvnEis" 
upstream_id"f469ecdd-e60a-46f1-a4f9-9085e02ba8f6" 
total_cost0.000249
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

Evaluation details

Result Evaluator Details Meta Data
Pass Matches text
Case sensitive: Spike
 n/a
Pass Matches Regex
/\bSpike\b/
 n/a
100.0000%