Run: 2026-05-01-01KQHRWSQG9G8VW16QQRVQHRAB

Run Details

Model:
Grok 4.20 (Reasoning)
Test:
Data extraction
Scenario:
What instrument does Lucy play?
Duration:
4.7s
Cost:
$0.001159
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
Pass Matches text (details)
Pass Matches Regex (details)
no eval Overall

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"2026-05-01T12:40:53.749Z" 5/1/2026, 12:40:53 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4630
moderation_latency(null)
generation_time4660
tokens_prompt75
tokens_completion96
native_tokens_prompt185
native_tokens_completion398
native_tokens_completion_images(null)
native_tokens_reasoning397
native_tokens_cached64
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"completed"
usage0.00115905
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"dedef0d9-dc9b-9897-9274-c397bad974d8"
is_byokfalse
latency66
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777639253-5A43M0BjIdPZMZh8BLnM"
session_id(null)
api_type"completions"
id"gen-1777639253-rqHAXZiBhpnuV7sELpta"
upstream_id"dedef0d9-dc9b-9897-9274-c397bad974d8"
total_cost0.00115905
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
Pass Matches text
Case insensitive: bass
 n/a
Pass Matches Regex
/\bbass\b/i
 n/a
no eval