Stubidity

Stupidity is doing the same thing over and over and expecting different results.

Save money 💸; stop burning 🔥 tokens during dev/test.

Save time ⏰; avoid Heisenbugs 🥸 and flaky tests 🤞 deterministic API stub 🎯.

Getting started

The package can be installed by adding stubidity to your list of dependencies in mix.exs:

def deps do
  [
    {:stubidity, "~> 0.4.0"}
  ]
end

It can then be mounted in another Plug.Router, for example:

defmodule ExampleWeb.Router do
  use Plug.Router

  plug :match
  plug :dispatch

  forward("/stub", Stubidity)
end

Client usage

To use in your project, set your OpenAI base url to the path where Stubidity is running. You are welcome to use a public instance of Stubidity at https://fmops.ai/api/v1/stub/openai/v1. For example:

import openai

openai.api_base = "https://fmops.ai/api/v1/stub/openai/v1"

Stubidity aims to provide a faithful API stub, so request headers and bodies must conform to the expected schemas. One notable exception is the API key, where any non-empty value is considered valid.

To create a ChatGPT completion with curl:

curl \
  -H "content-type: application/json" \
  -H "authorization: bearer foo" \
  -X POST \
  https://fmops.ai/api/v1/stub/openai/v1/chat/completions \
  -d '{"model": "gpt-3.5-turbo","messages": [{"role": "system", "message": "tell me a joke"}]}'

{"choices":[{"finish_reason":null,"index":0,"message":{"content":"Why don't scientists trust atoms? Because they make up everything.","role":"assistant"}}],"created":1682447196,"id":"chatcmpl-abc123","model":"gpt-3.5-turbo-0301","object":"chat.completion","usage":{"completion_tokens":13,"prompt_tokens":3,"total_tokens":16}}

Streaming is also supported:

curl \
  -H "content-type: application/json" \
  -H "authorization: bearer foo" \
  -X POST \
  https://fmops.ai/api/v1/stub/openai/v1/chat/completions \
  -d '{"model": "gpt-3.5-turbo","messages": [{"role": "system", "message": "tell me a joke"}]}'

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"role":"assistant"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":"Why"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" was"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" the"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" math"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" book"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" sad"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":"?\n\n"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":"Because"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" it"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" had"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" too"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" many"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":" problems"},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{"content":"."},"index":0,"finish_reason":null}]}

data: {"id":"chatcmpl-6zwEy96ojYcDRcdNX8f4L9fu95CaJ","object":"chat.completion.chunk","created":1680219904,"model":"gpt-3.5-turbo-0301","choices":[{"delta":{},"index":0,"finish_reason":"stop"}]}

data: [DONE]

Features and roadmap

• OpenAI
  • /chat/completions buffered and streaming

Roadmap

• OpenAI
  • /completions buffered and streaming
• HuggingFace
  • gpt2 buffered
  • bloomz buffered and streaming

Copyright and License

Copyright (c) 2023, Feynman Liang.

Stubidity source code is licensed under the Apache 2.0 License.