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AI agent framework for Elixir with multi-provider LLM support
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lib/nous/memory/embedding/openai.ex
defmodule Nous.Memory.Embedding.OpenAI do
@moduledoc """
OpenAI embedding provider.
Uses text-embedding-3-small by default. Configurable model and base_url.
## Options
* `:api_key` - OpenAI API key (required, or set OPENAI_API_KEY env var)
* `:model` - Model name (default: "text-embedding-3-small")
* `:base_url` - API base URL (default: "https://api.openai.com/v1")
"""
@behaviour Nous.Memory.Embedding
@default_model "text-embedding-3-small"
@default_base_url "https://api.openai.com/v1"
@default_dimension 1536
@impl true
def embed(text, opts \\ []) do
api_key = opts[:api_key] || System.get_env("OPENAI_API_KEY")
model = opts[:model] || @default_model
base_url = opts[:base_url] || @default_base_url
unless api_key do
{:error, "OpenAI API key required. Set :api_key option or OPENAI_API_KEY env var."}
else
url = "#{base_url}/embeddings"
body = %{
input: text,
model: model
}
headers = [
{"authorization", "Bearer #{api_key}"},
{"content-type", "application/json"}
]
case Req.post(url, json: body, headers: headers) do
{:ok, %Req.Response{status: 200, body: %{"data" => [%{"embedding" => embedding} | _]}}} ->
{:ok, embedding}
{:ok, %Req.Response{status: status, body: body}} ->
{:error, %{status: status, body: body}}
{:error, reason} ->
{:error, reason}
end
end
end
@impl true
def embed_batch(texts, opts \\ []) do
api_key = opts[:api_key] || System.get_env("OPENAI_API_KEY")
model = opts[:model] || @default_model
base_url = opts[:base_url] || @default_base_url
unless api_key do
{:error, "OpenAI API key required. Set :api_key option or OPENAI_API_KEY env var."}
else
url = "#{base_url}/embeddings"
body = %{
input: texts,
model: model
}
headers = [
{"authorization", "Bearer #{api_key}"},
{"content-type", "application/json"}
]
case Req.post(url, json: body, headers: headers) do
{:ok, %Req.Response{status: 200, body: %{"data" => data}}} ->
embeddings =
data
|> Enum.sort_by(& &1["index"])
|> Enum.map(& &1["embedding"])
{:ok, embeddings}
{:ok, %Req.Response{status: status, body: body}} ->
{:error, %{status: status, body: body}}
{:error, reason} ->
{:error, reason}
end
end
end
@impl true
def dimension, do: @default_dimension
end