diff --git a/src/anthropicExplainPatch.js b/src/anthropicExplainPatch.js
index 2c11a64..0a582f7 100644
--- a/src/anthropicExplainPatch.js
+++ b/src/anthropicExplainPatch.js
@@ -1,36 +1,18 @@
 import Anthropic from '@anthropic-ai/sdk'
 import { countTokens } from '@anthropic-ai/tokenizer'
+import { SYSTEM_PROMPT, explainPatchHelper } from './utils.js'
 
 /* eslint-disable camelcase */
 export default async function explainPatch ({
   apiKey, patchBody, owner, repo,
   models = ['claude-3-opus-20240229'],
-  system = `
-You are an expert software engineer reviewing a pull request on Github. Lines that start with "+" have been added, lines that start with "-" have been deleted. Use markdown for formatting your review.
-
-Desired format:
-### Description
-<description_of_PR> // How does this PR change the codebase? What is the motivation for this change?
-
-### Changes
-<list_of_changes> // Describe the main changes in the PR, organizing them by filename
-
-### Security Hotspots
-<list_of_security_hotspots> // Describe locations for possible vulnerabilities in the change, order by risk
-\n`,
+  system = SYSTEM_PROMPT,
   max_tokens = 2048,
   temperature = 1,
   top_p = 1,
   amplification = 2,
   debug = false
 }) {
-  const userPrompt = `Repository: https://github.com/${owner}/${repo}\n\nThis is the PR diff\n\`\`\`\n${patchBody}\n\`\`\``
-  const realModels = Array.isArray(models) ? models : models.split(' ')
-
-  if (debug) {
-    console.log(`user_prompt:\n\n${userPrompt}`)
-  }
-
   const pLen = countTokens(patchBody)
   if (pLen === 0) { throw new Error('The patch is empty, cannot summarize!') }
   if (pLen < amplification * max_tokens) {
@@ -39,15 +21,10 @@ Desired format:
 
   const anthropic = new Anthropic({ apiKey })
 
-  let model = null
-
-  // iterate over the models, and find one that works, or throw the last error
-  // catch all the original errors in between, and throw the last one
-  for (let i = 0; i < realModels.length; i++) {
-    try {
-      model = realModels[i]
-
-      var aiResponse = await anthropic.messages.create({
+  return await explainPatchHelper(
+    patchBody, owner, repo, models, debug,
+    async (userPrompt, model) => {
+      const aiResponse = await anthropic.messages.create({
         max_tokens,
         temperature,
         model,
@@ -60,29 +37,12 @@ Desired format:
           }
         ]
       })
-
-      break
-    } catch (e) {
-      if (i + 1 === realModels.length) {
-        // last model
-        throw e
+      const response = aiResponse.content
+      if (debug) {
+        console.log(response)
       }
-
-      console.log(e)
-      continue
+      return response[0].text
     }
-  }
-
-  let response = aiResponse.content
-
-  if (debug) {
-    console.log(response)
-  }
-
-  response = response[0].text.replaceAll('### Changes', '<details>\n<summary><i>Changes</i></summary>\n\n### Changes')
-  response = response.replaceAll('### Security Hotspots', '</details>\n\n### Security Hotspots')
-  response += `\n\n<!-- Generated by ${model} -->`
-
-  return response
+  )
 }
 /* eslint-enable camelcase */
diff --git a/src/bedrockExplainPatch.js b/src/bedrockExplainPatch.js
index 2647467..7389231 100644
--- a/src/bedrockExplainPatch.js
+++ b/src/bedrockExplainPatch.js
@@ -3,6 +3,7 @@ import {
   BedrockRuntimeClient,
   InvokeModelCommand
 } from '@aws-sdk/client-bedrock-runtime'
+import { SYSTEM_PROMPT, explainPatchHelper } from './utils.js'
 
 const COUNT_TOKENS_HASHFUN = {
   'amazon.titan-text-express-v1': null,
@@ -45,19 +46,7 @@ const countTokens = (text, modelId) => {
 export default async function explainPatch ({
   patchBody, owner, repo,
   models = ['anthropic.claude-3-opus-20240229-v1:0'],
-  system = `
-You are an expert software engineer reviewing a pull request on Github. Lines that start with "+" have been added, lines that start with "-" have been deleted. Use markdown for formatting your review.
-
-Desired format:
-### Description
-<description_of_PR> // How does this PR change the codebase? What is the motivation for this change?
-
-### Changes
-<list_of_changes> // Describe the main changes in the PR, organizing them by filename
-
-### Security Hotspots
-<list_of_security_hotspots> // Describe locations for possible vulnerabilities in the change, order by risk
-\n`,
+  system = SYSTEM_PROMPT,
   max_tokens = 2048,
   temperature = 1,
   top_p = 1,
@@ -65,31 +54,18 @@ Desired format:
   region = 'us-east-1',
   debug = false
 }) {
-  const userPrompt = `Repository: https://github.com/${owner}/${repo}\n\nThis is the PR diff\n\`\`\`\n${patchBody}\n\`\`\``
-  const realModels = Array.isArray(models) ? models : models.split(' ')
-
-  if (debug) {
-    console.log(`user_prompt:\n\n${userPrompt}`)
-  }
-
   const client = new BedrockRuntimeClient({ region })
 
-  let modelId = null
-  let response = null
-
-  // iterate over the models, and find one that works, or throw the last error
-  // catch all the original errors in between, and throw the last one
-  for (let i = 0; i < realModels.length; i++) {
-    try {
-      modelId = realModels[i]
-
-      const pLen = countTokens(patchBody, modelId)
+  return await explainPatchHelper(
+    patchBody, owner, repo, models, debug,
+    async (userPrompt, model) => {
+      const pLen = countTokens(patchBody, model)
 
       if (pLen === 0) { throw new Error('The patch is empty, cannot summarize!') }
       if (pLen < amplification * max_tokens) { throw new Error('The patch is trivial, no need for a summarization') }
 
       const command = new InvokeModelCommand({
-        modelId,
+        modelId: model,
         contentType: 'application/json',
         accept: 'application/json',
         body: JSON.stringify({
@@ -112,28 +88,12 @@ Desired format:
       if (debug) {
         console.log(`response:\n\n${textResponse}`)
       }
-      response = JSON.parse(textResponse)
-
-      break
-    } catch (e) {
-      if (i + 1 === realModels.length) {
-        // last model
-        throw e
+      const response = JSON.parse(textResponse)
+      if (debug) {
+        console.log(response)
       }
-
-      console.log(e)
-      continue
+      return response.content[0].text
     }
-  }
-
-  if (debug) {
-    console.log(response)
-  }
-
-  response = response.content[0].text.replaceAll('### Changes', '<details>\n<summary><i>Changes</i></summary>\n\n### Changes')
-  response = response.replaceAll('### Security Hotspots', '</details>\n\n### Security Hotspots')
-  response += `\n\n<!-- Generated by ${modelId} -->`
-
-  return response
+  )
 }
 /* eslint-enable camelcase */
diff --git a/src/openaiExplainPatch.js b/src/openaiExplainPatch.js
index 408796f..6d0d853 100644
--- a/src/openaiExplainPatch.js
+++ b/src/openaiExplainPatch.js
@@ -1,23 +1,12 @@
 import OpenAI from 'openai'
 /* eslint-disable camelcase */
 import { encoding_for_model } from 'tiktoken'
+import { SYSTEM_PROMPT, explainPatchHelper } from './utils.js'
 
 export default async function explainPatch ({
   apiKey, patchBody, owner, repo,
   models = ['gpt-4-0125-preview', 'gpt-3.5-turbo-0125'],
-  system = `
-You are an expert software engineer reviewing a pull request on Github. Lines that start with "+" have been added, lines that start with "-" have been deleted. Use markdown for formatting your review.
-
-Desired format:
-### Description
-<description_of_PR> // How does this PR change the codebase? What is the motivation for this change?
-
-### Changes
-<list_of_changes> // Describe the main changes in the PR, organizing them by filename
-
-### Security Hotspots
-<list_of_security_hotspots> // Describe locations for possible vulnerabilities in the change, order by risk
-\n`,
+  system = SYSTEM_PROMPT,
   max_tokens = 2048,
   temperature = 1,
   top_p = 1,
@@ -27,26 +16,18 @@ Desired format:
   debug = false
 }) {
   const openai = new OpenAI({ apiKey })
-  const realModels = Array.isArray(models) ? models : models.split(' ')
-  const userPrompt = `Repository: https://github.com/${owner}/${repo}\n\nThis is the PR diff\n\`\`\`\n${patchBody}\n\`\`\``
 
-  if (debug) {
-    console.log(`user_prompt:\n\n${userPrompt}`)
-  }
+  return await explainPatchHelper(
+    patchBody, owner, repo, models, debug,
+    async (userPrompt, model) => {
+      const enc = encoding_for_model(model)
+      const pLen = enc.encode(patchBody).length
 
-  let m = null
-  let enc
-  let pLen
-
-  for (let i = 0; i < realModels.length; i++) {
-    try {
-      m = realModels[i]
-      enc = encoding_for_model(m)
-      pLen = enc.encode(patchBody).length
       if (pLen === 0) { throw new Error('The patch is empty, cannot summarize!') }
       if (pLen < amplification * max_tokens) { throw new Error('The patch is trivial, no need for a summarization') }
-      var aiResponse = await openai.chat.completions.create({
-        model: m,
+
+      const aiResponse = await openai.chat.completions.create({
+        model,
         messages: [
           {
             role: 'system',
@@ -63,29 +44,12 @@ Desired format:
         frequency_penalty,
         presence_penalty
       })
-      break
-    } catch (e) {
-      if (i + 1 === realModels.length) {
-        // last model
-        throw e
+      if (debug) {
+        console.log(aiResponse)
+        console.log(aiResponse.choices[0].message)
       }
-
-      console.log(e)
-      continue
+      return aiResponse.choices[0].message.content
     }
-  }
-
-  if (debug) {
-    console.log(aiResponse)
-    console.log(aiResponse.choices[0].message)
-  }
-
-  let response = aiResponse.choices[0].message.content
-
-  response = response.replaceAll('### Changes', '<details>\n<summary><i>Changes</i></summary>\n\n### Changes')
-  response = response.replaceAll('### Security Hotspots', '</details>\n\n### Security Hotspots')
-  response += `\n\n<!-- Generated by ${m} -->`
-
-  return response
+  )
 }
 /* eslint-enable camelcase */
diff --git a/src/utils.js b/src/utils.js
new file mode 100644
index 0000000..3d9a8f8
--- /dev/null
+++ b/src/utils.js
@@ -0,0 +1,47 @@
+export const SYSTEM_PROMPT = `
+You are an expert software engineer reviewing a pull request on Github. Lines that start with "+" have been added, lines that start with "-" have been deleted. Use markdown for formatting your review.
+
+Desired format:
+### Description
+<description_of_PR> // How does this PR change the codebase? What is the motivation for this change?
+
+### Changes
+<list_of_changes> // Describe the main changes in the PR, organizing them by filename
+
+### Security Hotspots
+<list_of_security_hotspots> // Describe locations for possible vulnerabilities in the change, order by risk
+\n`
+
+export async function explainPatchHelper (patchBody, owner, repo, models, debug, getResponse) {
+  models = Array.isArray(models) ? models : models.split(' ')
+
+  let model = null
+  let response = null
+
+  const userPrompt = `Repository: https://github.com/${owner}/${repo}\n\nThis is the PR diff\n\`\`\`\n${patchBody}\n\`\`\``
+
+  if (debug) {
+    console.log(`user_prompt:\n\n${userPrompt}`)
+  }
+
+  for (let i = 0; i < this.models.length; i++) {
+    try {
+      model = this.models[i]
+      response = await this.getResponse(userPrompt, model)
+      break
+    } catch (e) {
+      if (i + 1 === this.models.length) {
+        // last model
+        throw e
+      }
+
+      console.log(e)
+      continue
+    }
+  }
+
+  response = response.replaceAll('### Changes', '<details>\n<summary><i>Changes</i></summary>\n\n### Changes')
+  response = response.replaceAll('### Security Hotspots', '</details>\n\n### Security Hotspots')
+  response += `\n\n<!-- Generated by ${model} -->`
+  return response
+}