Davinci Is Bad at Maths: Fine-Tuning ChatGPT Models With NodeJs and OpenAI v4

This article focuses on using OpenAI's Node.js library to build a CLI that trains the Davinci model in mathematics.

Nutshell

• "Scaffold" our library.
• Write a set of functions to wrap OpenAI's API calls.
• Build a simple CLI to call the functions.
• Prove ChatGPT is (usually) good at math.
• Prove Davinci is (usually) bad at math.
• Build a simple fine-tuning dataset for teaching Davinci math.
• Upload "simple fine-tuning dataset".
• Turn a "simple fine-tuning dataset" into a simple fine-tuning model.
• Proving our fine-tuning taught Davinci math.

Scaffold

cd ~/Dev/YourRootFolderForPersonalStuff/
mdkir davinci-is-bad-at-maths
cd davinci-is-bad-at-maths
npm i dotenv openai
npm i prettier -D
touch .env
touch goodAtMathsDatasetBuilder.js
touch openAI.js
mkdir bin
touch bin/cli.js

package.json

... can be simple, like this:

{
  "description": "Experiments using OpenAI's API NodeJs v4 library",
  "name": "davinci-is-bad-at-maths",
  "private": true,
  "bin": "./bin/cli.js",
  "dependencies": {
    "dotenv": "^16.3.1",
    "openai": "^4.0.0"
  },
  "devDependencies": {
    "prettier": "^3.0.2"
  },
  "main": "openAI.js",
  "scripts": {
    "cli": "node bin/cli.js",
    "prettier": "prettier --list-different --write \"**/*.{css,html,js,json,md,mjs,scss,ts,yaml}\""
  },
  "type": "module"
}

The "cli" entry in scripts means we can call npm run cli -- commandName [args]. If you use this instead of node bin/cli.js commandName [args] it means you maintain your shell's history even if you change the app structure later, or the name of cli.js. Simple things please simple minds and I have a simple mind.

.env

... must look like this but with your own API_KEY:

OPENAI_API_KEY="sk-d0ntY0uD4reUs3MyK3yG3tY0urOwnFr0mOp0n41W36s1t3Yo"
OPENAI_MODEL="davinci"

A set of functions to wrap OpenAI's API calls.

Open openAI.js and copy this in:

/** A not-robust OpenAI v4 CLI; a playground for OpenAI v4 API calls; a utility for working with a OpenAI model who is really really, like - I mean - really bad at maths.
 * @usage
 * >> import commandHub from "openAI.js"
 * >> const [, , command, ...args] = process.argv
 * >> const commandFunc = commandHub[command]
 * >> commandFunc(...args)
 */
import fs from "fs"
import dotenv from "dotenv"
import OpenAI from "openai"

dotenv.config()

// Fine Tuning only works with davinci, curie, babbage, and ada, so we will put which in our .env file so that we can call the same one consistently.
const model = process.env.OPENAI_MODEL

// Instantiate the API object.
const apiKey = process.env.OPENAI_API_KEY
const openai = new OpenAI({ apiKey })

/** openai.chat.completions.create
 * @usage
 * >> npm run cli -- chatCompletionsCreate "2+8=?"
 * @param {String} chatPrompt your sum to an assistent who is (usually) good at maths */
export const chatCompletionsCreate = async chatPrompt => {
  const res = await openai.chat.completions.create({
    messages: [
      { role: "system", content: "You are good at maths." },
      { role: "user", content: chatPrompt },
    ],
    model: model,
  })
  console.log("chatCompletionsCreate", res.choices)
}

/** openai.completions.create
 * @tutorial
 * Normally we would use `chatCompletionsCreate` but for Fine Tuned models we must use base models and therefore `completionsCreate`.
 * @usage
 * >> npm run cli -- completionsCreate "2+8=?"
 * @param {String} chatPrompt your sum to an assistent who is (usually) good at maths */
export const completionsCreate = async chatPrompt => {
  const res = await openai.completions.create({
    model: model,
    prompt: chatPrompt,
    temperature: 0,
  })
  console.log("completionsCreate", res)
}

/** openai.files.create and output to `openai.files.create.json`
 * @usage
 * >> npm run cli -- filesCreate bad-at-maths-fine-tuning-dataset.jsonl
 * @param {String} filePath of JSONLD file to upload. */
export const filesCreate = async filePath => {
  const res = await openai.files.create({
    file: fs.createReadStream(filePath),
    purpose: "fine-tune",
  })
  console.log("filesCreate", res)
  fs.writeFileSync(
    "openai.files.create.json",
    JSON.stringify(res, null, 2),
    "utf-8",
  )
}
// openai.files.del

/** openai.files.list and output to `openai.files.list.json`
 * @usage
 * >> npm run cli -- filesList */
export const filesList = async () => {
  const res = await openai.files.list()
  console.log("filesList", res)
  fs.writeFileSync(
    "openai.files.list.json",
    JSON.stringify(res, null, 2),
    "utf-8",
  )
}
// openai.files.retrieve
// openai.files.retrieveContent

/** openai.fineTunes.create
 * @usage
 * >> npm run cli -- fineTunesCreate "bad-at-maths-fine-tuning-dataset.jsonl" "is-good-at-maths"
 * @param {String} fileId of previously uploaded file where `purpose: "fine-tune"`.
 * @param {String} suffix to add to the resulting model name for easily id later.  */
export const fineTunesCreate = async (fileId, suffix) => {
  const res = await openai.fineTunes.create({
    training_file: fileId,
    suffix: suffix,
    model: model,
  })
  console.log("fineTunesCreate", res)
  fs.writeFileSync(
    "openai.fineTunes.create.json",
    JSON.stringify(res, null, 2),
    "utf-8",
  )
}

/** openai.fineTunes.list
 * @usage
 * >> npm run cli -- fineTunesList */
export const fineTunesList = async () => {
  const res = await openai.fineTunes.list()
  console.log("fineTunesList", res)
  fs.writeFileSync(
    "openai.fineTunes.list.json",
    JSON.stringify(res, null, 2),
    "utf-8",
  )
}

// openai.fineTunes.cancel
// openai.fineTunes.retrieve
// openai.fineTunes.listEvents
// openai.models.del
// openai.models.list
// openai.models.del
// openai.images.generate
// openai.images.edit
// openai.images.createVariation
// openai.audio.transcriptions.create
// openai.audio.translations.create
// openai.edits.create
// openai.embeddings.create
// openai.moderations.create

// A command hub.
const commandHub = {
  chatCompletionsCreate,
  completionsCreate,
  filesCreate,
  filesList,
  fineTunesCreate,
  fineTunesList,
}

export default commandHub

You'll notice I have left all the available endpoints in OpenAI's library in this file, which I leave for you to add as an exercise to create a useful module.

A simple CLI to call the functions

Open bin/cli.js and paste this:

#!/usr/bin/env node
/** A not-very-robust OpenAI v4 CLI; a playground for OpenAI v4 API calls; a utility for working with a OpenAI model who is really really, like - I mean - really bad at maths.
 * @usage with "cli" in "scripts" (don't forget the "--").
 * >> npm cli -- commandName [arg1 arg2 ...arg(n)]
 */
import commandHub from "../openAI.js"

const [, , command, ...args] = process.argv

// Call the requested command. Not a robust CLI but it gets the job done!
if (!commandHub.hasOwnProperty(command)) {
  throw "No such command as `" + command + "`"
} else {
  const commandFunc = commandHub[command]
  commandFunc(...args)
}

Prove ChatGPT is (usually) good at math

ChatGPT should have no problems answering any sums because (usually) ChatGPT is good at maths, which we can prove (and test our CLI) by doing the following:

1. Edit .env to say:

OPENAI_API_KEY="sk-d0ntY0uD4reUs3MyK3yG3tY0urOwnFr0mOp0n41W36s1t3Yo"
OPENAI_MODEL="gpt-3.5-turbo"

2. Run the command:

npm run cli -- chatCompletionsCreate "12+4`.

See? Good at maths.

At a later date, when it becomes possible to Fine Tune chatbot models like "gpt-3.5-turbo", we will Fine Tune it to be bad at maths.

The -- part is required to ensure the parameters are passed correctly into NPM. I won't go into why because I don't know why. You might. That's good. Let me know if you know. All I know is that you have to do it to make it work and that's a fact.

import dotenv from "dotenv"
import OpenAI from "openai"

const apiKey = process.env.OPENAI_API_KEY
const model = process.env.OPENAI_MODEL
const openai = new OpenAI({ apiKey })

const chatCompletionsCreate = async chatPrompt => {
  const res = await openai.chat.completions.create({
    messages: [
      { role: "system", content: "You are good at maths." },
      { role: "user", content: chatPrompt },
    ],
    model: model,
  })
  console.log("chatCompletionsCreate", res.choices)
}

chatCompletionsCreate("12+4")

Prove Davinci is (usually) bad at math.

1. Edit .env to say:

OPENAI_API_KEY="sk-d0ntY0uD4reUs3MyK3yG3tY0urOwnFr0mOp0n41W36s1t3Yo"
OPENAI_MODEL="davinci"

2. Run the command

npm run cli -- completionsCreate "12+4`.

import fs from "fs"
import dotenv from "dotenv"
import OpenAI from "openai"

const apiKey = process.env.OPENAI_API_KEY
const openai = new OpenAI({ apiKey })
const completionsCreate = async chatPrompt => {
  const res = await openai.completions.create({
    model: model,
    prompt: chatPrompt,
    temperature: 0,
  })
  console.log("completionsCreate", res)
}

completionsCreate("12+4")

Teaching DaVinci maths

As per the documentation, "Fine Tuning" ChatGPT of models requires large datasets, at least 200. The whole point of davinci-is-bad-at-maths is learn how to create, upload and use "Fine Tuning" datasets and shortcut the work actually BUILDING a useful rather-than-silly dataset.

And since we are coders, we can code a shortcut like this:

Open goodAtMathsDatasetBuilder.js and paste this:

import fs from "fs"

// Don't waste bandwidth with duplicates in the fine-training data.
const data = new Set()

// Build a list of 500 sums which have been done correctly.
while (data.size < 500) {
  // Two random integers.
  let x = Math.round(Math.random() * 1000)
  let y = Math.round(Math.random() * 1000)
  let result = x + y

  data.add(
    JSON.stringify({
      prompt: `${x}+${y}\n\n###\n\n`,
      completion: `${x}+${y}=${result} END`,
    }),
  )
}

fs.writeFileSync(
  "good-at-maths-fine-tuning-dataset.jsonl",
  [...data].join("\n"),
  "utf-8",
)

console.log("JSONL fine-tuning dataset has been created.")

All we're doing here is building a data set that "Fine Tunes" ChatGPT models to be good at maths, and all we need is lots of sums with "completions" which are correct.

Run this script like this:

node goodAtMathsDatasetBuilder.js`

Open good-at-maths-fine-tuning-dataset.jsonl and it should look like this:

{"prompt":"487+63\n\n###\n\n","completion":"487+63=550 END"}
{"prompt":"842+624\n\n###\n\n","completion":"842+624=1466 END"}
{"prompt":"58+783\n\n###\n\n","completion":"58+783=841 END"}
{"prompt":"96+478\n\n###\n\n","completion":"96+478=574 END"}
{"prompt":"69+401\n\n###\n\n","completion":"69+401=470 END"}

... with more sums that are right.

Upload "simple fine-tuning dataset".

To upload the dataset, run

npm run cli -- filesCreate good-at-maths-fine-tuning-dataset.jsonl

import fs from "fs"
import dotenv from "dotenv"
import OpenAI from "openai"

const apiKey = process.env.OPENAI_API_KEY
const openai = new OpenAI({ apiKey })

const filesCreate = async filePath => {
  const res = await openai.files.create({
    file: fs.createReadStream(filePath),
    purpose: "fine-tune",
  })
  console.log("filesCreate", res)
  fs.writeFileSync(
    "openai.files.create.json",
    JSON.stringify(res, null, 2),
    "utf-8",
  )
}

filesCreate("good-at-maths-fine-tuning-dataset.jsonl")

Take note of the file id, e.g. "file-th15IsM1ne3G3tY0urOwn1Yo"

Turn a "simple fine-tuning dataset" into a simple fine-tuning model

To create a "Fine Tuned" model using this dataset call:

npm run cli -- fineTunesCreate "file-th15IsM1ne3G3tY0urOwn1Yo"`"is-good-at-maths"

import fs from "fs"
import dotenv from "dotenv"
import OpenAI from "openai"

const apiKey = process.env.OPENAI_API_KEY
const openai = new OpenAI({ apiKey })

const fineTunesCreate = async (fileId, suffix) => {
  const res = await openai.fineTunes.create({
    training_file: fileId,
    suffix: suffix,
    model: model,
  })
  console.log("fineTunesCreate", res)
  fs.writeFileSync(
    "openai.fineTunes.create.json",
    JSON.stringify(res, null, 2),
    "utf-8",
  )
}

fineTunesCreate("file-th15IsM1ne3G3tY0urOwn1Yo")

It takes a while to teach Davinci maths because, to be honest, DaVinci is really bad at maths!

You can run:

npm run cli -- fineTunesList

Wait until status: 'pending' changes to status: 'suceeded'

Proving our fine tuning taught davinci math

When status: 'suceeded', find the fine_tuned_model name.

1. Edit .env to say:

OPENAI_API_KEY="sk-d0ntY0uD4reUs3MyK3yG3tY0urOwnFr0mOp0n41W36s1t3Yo"
OPENAI_MODEL="<fine_tuned_model name>"

2. Run:

npm run cli -- completionsCreate "12+4`.

It's a hokey response, but you should see that Davinci is better at maths.

What we learnt

1. How to use OpenAI's V4 library.
2. How to create a "Fine Tuning" dataset and upload it.
3. How to generate a new OpenAI model.
4. How to write a crappy CLI.

This project can be found here:

https://gitlab.com/timitee/davinci-is-bad-at-maths/edit#js-general-project-settings