introduction-to-bedrock/Claude-MessagesAPI-Examples.ipynb

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 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Migration from Text Completions API to the new Messages API\n",
    "\n",
    "The text completions API for Claude is now in legacy mode and it is recommended to migrate to \n",
    "the new Messages API. The Messages API is backward compatible with current Claude Models on Bedrock and requires that a modified JSON body be passed to the invoke methods. An example of a text completion API style body and prompt is shown below:\n",
    "\n",
    "prompt='Human:\\n\\n What is quantum mechanics? \\n\\n Assistant:\\n\\n'\n",
    "\n",
    "body = json.dumps({\n",
    "                \"prompt\": prompt,\n",
    "                \"temperature\": 0.5,\n",
    "                \"top_p\": 0.9,\n",
    "                \"max_tokens_to_sample\": 512,\n",
    "            })\n",
    "\n",
    "The new body will have the following form with an updated messages element.\n",
    "\n",
    "body=json.dumps(\n",
    "        {\n",
    "            \"anthropic_version\": \"bedrock-2023-05-31\",\n",
    "            \"max_tokens\": 512,\n",
    "            \"temperature\": 0.5,\n",
    "            \"top_p\": 0.9,\n",
    "            \"system\": system_prompt,\n",
    "            \"messages\": messages\n",
    "        }  \n",
    "    ) \n",
    "    \n",
    "The messages element represents a list of JSONL objects that include the role and content for each turn in an input. For a single input, the messages element is shown below where the \"Human\" tag from the text Completion API is replaced by \"user\" in the new API:\n",
    "\n",
    "messages=[{ \"role\":'user', \"content\":[{'type':'text','text': \"What is quantum mechanics?\"}]}]\n",
    "\n",
    "Note also the \"system\" key that allows you to provide a system prompt to steer the model in a particular direction by giving it personality, tone, rules, contraints, and other relevent content to shape it's response to your input.\n",
    "\n",
    "Lets see how this works with some examples with Claude 2.1 and Claude 3-Sonnet"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Initialize packages"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "%pip install --upgrade pip\n",
    "%pip install boto3>=1.33.2 --force-reinstall --quiet\n",
    "%pip install botocore>=1.33.2 --force-reinstall --quiet\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Restart the kernel with the updated packages that are installed through the dependencies above"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<script>Jupyter.notebook.kernel.restart()</script>"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# restart kernel\n",
    "from IPython.core.display import HTML\n",
    "HTML(\"<script>Jupyter.notebook.kernel.restart()</script>\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [],
   "source": [
    "import boto3\n",
    "import json\n",
    "\n",
    "\n",
    "bedrock_client = boto3.client('bedrock-runtime',region_name='us-west-2')\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Helper function to pass our models, messages, and inference parameters"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [],
   "source": [
    "def generate_message(bedrock_runtime, model_id, messages, max_tokens=512,top_p=1,temp=0.5,system=''):\n",
    "\n",
    "    body=json.dumps(\n",
    "        {\n",
    "            \"anthropic_version\": \"bedrock-2023-05-31\",\n",
    "            \"max_tokens\": max_tokens,\n",
    "            \"messages\": messages,\n",
    "            \"temperature\": temp,\n",
    "            \"top_p\": top_p,\n",
    "            \"system\": system\n",
    "        }  \n",
    "    )  \n",
    "    \n",
    "    response = bedrock_runtime.invoke_model(body=body, modelId=model_id)\n",
    "    response_body = json.loads(response.get('body').read())\n",
    "\n",
    "    return response_body"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Note the response if the \"anthropic_version\" key is not provided in the body when using the messages API with any of the Claude models:\n",
    "\n",
    "ValidationException: An error occurred (ValidationException) when calling the InvokeModel operation: Malformed input request: #: subject must not be valid against schema {\"required\":[\"messages\"]}#: required key [anthropic_version] not found, please reformat your input and try again."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "messages=[{ \"role\":'user', \"content\":[{'type':'text','text': \"What is quantum mechanics?\"}]}]\n",
    "\n",
    "body=json.dumps(\n",
    "        {\n",
    "            \"max_tokens\": 512,\n",
    "            \"messages\": messages,\n",
    "            \"temperature\": 0.5,\n",
    "            \"top_p\": 1\n",
    "        }  \n",
    "    )  \n",
    "    \n",
    "response = bedrock_client.invoke_model(body=body, modelId=\"anthropic.claude-3-sonnet-20240229-v1:0\")\n",
    "response_body = json.loads(response.get('body').read())"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Single-Input"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "messages=[{ \"role\":'user', \"content\":[{'type':'text','text': \"What is quantum mechanics?\"}]}]\n",
    "\n",
    "generate_message(bedrock_client, model_id = 'anthropic.claude-v2:1',messages=messages,max_tokens=512,temp=0.5,top_p=0.9)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Multi-turn Input"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "messages=[{ \"role\":'user', \"content\":[{'type':'text','text': \"What is quantum mechanics? \"}]},\\\n",
    "         { \"role\":'assistant', \"content\":[{'type':'text','text': \"It is a branch of physics that \\\n",
    "         describes how matter and energy interact with discrete energy values \"}]},\\\n",
    "         { \"role\":'user', \"content\":[{'type':'text','text': \"Can you explain a bit more about discrete energies?\"}]}]\n",
    "\n",
    "generate_message(bedrock_client, model_id = 'anthropic.claude-v2:1',messages=messages,max_tokens=512,temp=0.5,top_p=0.9)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Claude 3 with Text Completions API will give the following error: \n",
    "\n",
    "ValidationException: An error occurred (ValidationException) when calling the InvokeModel operation: \"claude-3-sonnet-20240229\" is not supported on this API. Please use the Messages API instead."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "prompt='Human:\\n\\n What is quantum mechanics? \\n\\n Assistant:\\n\\n'\n",
    "\n",
    "body = json.dumps({ \"prompt\": prompt, \"temperature\": 0.5, \"top_p\": 0.9, \"max_tokens_to_sample\": 512, })\n",
    "\n",
    "response = bedrock_client.invoke_model(body=body, modelId=\"anthropic.claude-3-sonnet-20240229-v1:0\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Claude 3-sonnet single-turn example with correct Messages API call"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "messages=[{ \"role\":'user', \"content\":[{'type':'text','text': \"What is quantum mechanics?\"}]}]\n",
    "\n",
    "generate_message(bedrock_client, model_id = \"anthropic.claude-3-sonnet-20240229-v1:0\",messages=messages,max_tokens=512,temp=0.5,top_p=0.9)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Claude 3-sonnet multi-turn example with correct Messages API call"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "messages=[{ \"role\":'user', \"content\":[{'type':'text','text': \"What is quantum mechanics? \"}]},\\\n",
    "         { \"role\":'assistant', \"content\":[{'type':'text','text': \"It is a branch of physics that \\\n",
    "         describes how matter and energy interact with discrete energy values \"}]},\\\n",
    "         { \"role\":'user', \"content\":[{'type':'text','text': \"Can you explain a bit more about discrete energies?\"}]}]\n",
    "\n",
    "generate_message(bedrock_client, model_id = \"anthropic.claude-3-sonnet-20240229-v1:0\",messages=messages,max_tokens=512,temp=0.5,top_p=0.9)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Messages API with system prompt\n",
    "\n",
    "Compare this response to the response above without a system prompt"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "messages = [{ \"role\":'user', \"content\":[{'type':'text','text': \"What is quantum mechanics?\"}]}]\n",
    "\n",
    "system = \"Respond in a way a caveman would undestand\"\n",
    "generate_message(bedrock_client, model_id = \"anthropic.claude-3-sonnet-20240229-v1:0\",messages=messages,max_tokens=512,temp=0.5,top_p=0.9,system=system)"
   ]
  }
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