Best Model
Gemini 2.5 Flash (gemini-2.5-flash) — 1M context window for large knowledge bases. ~$0.88 per 1K requests.
For faster responses: Qwen 3.6 Plus (qwen-3.6-plus) at ~$0.75 per 1K requests.
Python — Knowledge Base Copilot
JavaScript — Slack Bot Copilot
With RAG (Retrieval-Augmented Generation)
For larger knowledge bases, retrieve relevant chunks first:Tips
- Use
gemini-2.5-flashfor large contexts (1M tokens = entire codebases/wikis) - Instruct the model to say “I don’t know” when info isn’t in the knowledge base
- Add conversation history for follow-up questions
- Cache frequent questions with Redis to reduce costs
Cost Estimate
| Scenario | Tokens | Model | Cost |
|---|---|---|---|
| Short Q&A (small context) | 2K in / 200 out | qwen-3.6-plus | ~$0.001 |
| RAG query (5 chunks) | 5K in / 500 out | gemini-2.5-flash | ~$0.004 |
| Full wiki context | 50K in / 500 out | gemini-2.5-flash | ~$0.02 |
Next Steps
- RAG / Search — full RAG implementation guide
- Streaming — real-time responses for chat UIs
- LangChain — build chains and agents