Custom GPT development Sydney for OpenAI, Claude and private LLM deployments

Sydney custom GPT development typically scopes in 1–2 weeks and ships a working assistant in 4–8 weeks, supporting OpenAI Assistants/Custom GPTs, Claude, and private LLM deployments with RAG and tool calling.

Custom GPTs and LLM-powered assistants now do specific business work — not just chat. We build custom GPTs and LLM assistants in Sydney across OpenAI, Anthropic Claude, and private model deployments, with RAG pipelines, tool calling, and integrations that make the assistant actually useful.

Need a custom GPT built in Sydney? View base service Sydney service area

What this service delivers

  • OpenAI Assistants, Custom GPTs and Claude projects
  • Private LLM deployments for confidentiality-sensitive use cases
  • RAG pipelines, tool calling and external integrations

Frequently asked questions

Which models do you build on?
OpenAI (GPT-4, Assistants, Custom GPTs), Anthropic Claude, and open-weights models for private deployment.
What's RAG and do we need it?
Retrieval-Augmented Generation lets the assistant cite your documents; you need it whenever the assistant must answer from your specific knowledge base.
Can the assistant take actions, not just answer?
Yes — tool calling lets the assistant query databases, send emails, update records, and trigger workflows.
Is our data sent to OpenAI?
API requests go to your chosen provider; for confidentiality-sensitive work we deploy private models on Azure OpenAI, AWS Bedrock, or self-hosted infrastructure.