Automation library · Chat assistants

Nano Banana/Gemini 2.5 Telegram bot with OpenAI

Started by an incoming Telegram message, and works across Telegram. It puts Gemini and OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 27 steps, 3 branches: large, and worth reading before you trust it with anything live.

LargeCalls a model: Gemini, OpenAIRetrieval

Download free
27 stepsLarge: read it before trusting it with anything live
3Branches: places the flow splits
0Loops or waits
1Service it connects to

The flow

Starts it 1Model 6Logic 10Service 10

The steps in the order they run, from what starts it.

  1. 1Telegram TriggerTelegram triggerStarts it
  2. 2Simple MemoryMemory Buffer WindowModel
  3. 3gpt-5-miniLm Chat Open AiModel
  4. 4gemini-2.5-flashLm Chat Google GeminiModel
  5. 5Set Initial DataSetLogic
  6. 6Generator AgentAgentModel
  7. 7SwitchSwitchLogic
  8. 8Fix JSON OutputCodeLogic
  9. 9TextSetLogic
  10. 10Get Image UrlHttp RequestService
  11. 11Get Audio UrlHttp RequestService
  12. 12Only PDF FileIfLogic
  13. 13Image Generation Ready?SwitchLogic
  14. 14Analyze ImageOpen AiModel
  15. 15Download AudioHttp RequestService
  16. 16Get File UrlHttp RequestService
  17. 17Incorrect formatTelegramService
  18. 18Nano Banana APIHttp RequestService
  19. 19Send Text MessageTelegramService
  20. 20ImageSetLogic
  21. 21Transcribe AudioOpen AiModel
  22. 22Download FileHttp RequestService
  23. 23Convert Image to BinaryCodeLogic
  24. 24AudioSetLogic
  25. 25Extract from FileExtract From FileService
  26. 26Send a photo messageTelegramService
  27. 27FileSetLogic

How it's built

Starts on
An incoming Telegram message
Steps
27, with 3 branches
Size
Large: read it before trusting it with anything live
Connects to
Telegram
Model
Gemini, OpenAI
Retrieval
Answers are drawn from documents you supply, not from the model alone

Questions

What does it need to run?

An n8n account, plus your own Telegram account, and a key for Gemini and OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an incoming Telegram message.

Does it use AI?

Yes. It calls Gemini and OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Take your time. At 27 steps it is large: read it before trusting it with anything live.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 27 steps before you point it at anything that matters.