OpenAI · Embedding model

Text Embedding 3 Large

openai/text-embedding-3-large

Embedding

Released Oct 30, 2025

text-embedding-3-large is OpenAI's most capable embedding model for both english and non-english tasks. Embeddings are a numerical representation of text that can be used to measure the relatedness between two...

Specifications

Input: text
Output: vector per input (float array; base64 on request)
Batch: up to 512 inputs per call
Billing: per input token

Use it

POST /api/v1/embeddings · MCP embed · full reference

curl https://omnirail.org/api/v1/embeddings \
  -H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
  -d '{"model":"openai/text-embedding-3-large","input":["brass lever espresso machine","coffee grinder"]}'