Model

Claude Opus 4.5

Test

Data extraction

Scenario

What instrument does Lucy play?

Run ID

2026-02-08-01KGYZ9AEDG40370RADYG4SE1C

Model input

User/Human
What instrument does Lucy play based on the following text? Only return the instrument, nothing else. In the school band, there are four instruments: drums, bass, flute, trumped. John plays the drums, Mary plays the flute, and Pete plays the trumpet. Lucy doesn't play a wind instrument.

Model response

AI
bass
created_at"2026-02-08T15:52:54.106703+00:00" Sunday, February 8th, 2026 at 3:52:54 PM GMT+00:00
model"anthropic/claude-4.5-opus-20251124" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1541
moderation_latency(null)
generation_time1668
tokens_prompt62
tokens_completion1
native_tokens_prompt73
native_tokens_completion4
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" 
usage0.000465
router(null)
provider_responses
0
id"msg_019mxgAFL45R9926RwzSu8ST" 
status200
is_byokfalse
latency1541
endpoint_id"be883404-eb42-4b2d-b6e4-c7daa3aa8d62" 
provider_name"Anthropic" 
model_permaslug"anthropic/claude-4.5-opus-20251124" 
api_type"completions" 
id"gen-1770565971-pmcXMvd6pWMU41sDWL56" 
upstream_id"msg_019mxgAFL45R9926RwzSu8ST" 
total_cost0.000465
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic" 

Evaluation details

Result Evaluator Details Meta Data
Pass Matches text
Case insensitive: bass
 n/a
Pass Matches Regex
/\bbass\b/i
 n/a
100.0000%