B4X

OpenAI (ChatGPT) Create Chat Completion

See more OpenAI ChatGPT Examples

Shows how to create a model response for a given chat conversation. B4X

Dim success As Boolean = False

'  This example assumes the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim http As ChilkatHttp
http.Initialize("http")

'  Implements the following CURL command:

'  curl https://api.openai.com/v1/chat/completions \
'    -H "Content-Type: application/json" \
'    -H "Authorization: Bearer $OPENAI_API_KEY" \
'    -d '{
'      "model": "gpt-3.5-turbo",
'      "messages": [{"role": "user", "content": "Hello!"}]
'    }'

'  Use the following online tool to generate HTTP code from a CURL command
'  Convert a cURL Command to HTTP Source Code

'  Use this online tool to generate code from sample JSON:
'  Generate Code to Create JSON

'  The following JSON is sent in the request body.

'  {
'    "model": "gpt-3.5-turbo",
'    "messages": [
'      {
'        "role": "user",
'        "content": "Hello!"
'      }
'    ]
'  }

Dim json As ChilkatJsonObject
json.Initialize
json.UpdateString("model", "gpt-3.5-turbo")
json.UpdateString("messages[0].role", "user")
json.UpdateString("messages[0].content", "Hello!")

'  Adds the "Authorization: Bearer $OPENAI_API_KEY" header.
'  This is NOT a real key.  Change the "sk-vi...." to your own key.
http.AuthToken = "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"
http.SetRequestHeader("Content-Type", "application/json")

Dim resp As ChilkatHttpResponse
resp.Initialize
success = http.HttpJson("POST", "https://api.openai.com/v1/chat/completions", json, "application/json", resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
resp.GetBodySb(sbResponseBody)

Dim jResp As ChilkatJsonObject
jResp.Initialize
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Log("Response Body:")
Log(jResp.Emit)

Dim respStatusCode As Int = resp.StatusCode
Log("Response Status Code = " & respStatusCode)
If respStatusCode >= 400 Then
    Log("Response Header:")
    Log(resp.Header)
    Log("Failed.")
    Return
End If


'  Sample JSON response:
'  (Sample code for parsing the JSON response is shown below)

'  {
'    "id": "chatcmpl-123",
'    "object": "chat.completion",
'    "created": 1677652288,
'    "choices": [
'      {
'        "index": 0,
'        "message": {
'          "role": "assistant",
'          "content": "\n\nHello there, how may I assist you today?"
'        },
'        "finish_reason": "stop"
'      }
'    ],
'    "usage": {
'      "prompt_tokens": 9,
'      "completion_tokens": 12,
'      "total_tokens": 21
'    }
'  }

'  Sample code for parsing the JSON response...
'  Use the following online tool to generate parsing code from sample JSON:
'  Generate Parsing Code from JSON



Dim index As Int
Dim Role As String
Dim Content As String
Dim finish_reason As String

Dim id As String = jResp.StringOf("id")
Dim v_object As String = jResp.StringOf("object")
Dim created As Int = jResp.IntOf("created")
Dim Prompt_tokens As Int = jResp.IntOf("usage.prompt_tokens")
Dim Completion_tokens As Int = jResp.IntOf("usage.completion_tokens")
Dim Total_tokens As Int = jResp.IntOf("usage.total_tokens")
Dim i As Int = 0
Dim count_i As Int = jResp.SizeOfArray("choices")
Do While i < count_i
    jResp.I = i
    index = jResp.IntOf("choices[i].index")
    Role = jResp.StringOf("choices[i].message.role")
    Content = jResp.StringOf("choices[i].message.content")
    finish_reason = jResp.StringOf("choices[i].finish_reason")
    i = i + 1
Loop