Best AI models for customer-support chatbots
Support bots need fast, consistent and affordable replies at high volume. These balanced models are a good starting point.
Ordered from lowest price
Live TokenRex prices. Per 1M tokens for chat and embeddings; per unit for media.
| # | Model | Input | Output / unit |
|---|---|---|---|
| 1 | Gemini 2.5 Flash Lite gemini-2.5-flash-lite | $0.10 | $0.40 |
| 2 | GPT-6 Luna gpt-6-luna | $0.10 | $0.50 |
| 3 | GPT-5.6 Luna gpt-5.6-luna | $0.20 | $1.20 |
| 4 | Gemini 3.1 Flash Lite gemini-3.1-flash-lite | $0.25 | $1.50 |
| 5 | GPT-5 Mini gpt-5-mini | $0.25 | $2.00 |
| 6 | Gemini 2.5 Flash gemini-2.5-flash | $0.30 | $2.50 |
| 7 | Gemini 3 Flash gemini-3-flash-preview | $0.50 | $3.00 |
| 8 | Gemini 3.6 Flash gemini-3.6-flash | $0.75 | $3.75 |
| 9 | Gemini 3.7 Flash gemini-3.7-flash | $0.75 | $3.75 |
| 10 | Gemini 3.8 Flash gemini-3.8-flash | $0.75 | $3.75 |
| 11 | GPT-5.4 Mini gpt-5.4-mini | $0.75 | $4.50 |
| 12 | Claude Haiku 4.5 claude-haiku-4-5 | $1.00 | $5.00 |
How to choose
- Cache the knowledge-base portion of your prompt.
- Stream responses so users see text immediately.
Try it with one API key
curl https://tokenrex.ai/api/public/v1/chat/completions \
-H "Authorization: Bearer $TOKENREX_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"gemini-2.5-flash-lite","messages":[{"role":"user","content":"Hello"}]}'Head-to-head comparisons
Questions
- How are these chatbot models ranked?
- Models are listed from the live TokenRex catalog and ordered by current price. We do not publish invented quality scores; open a model page for source-linked benchmarks where they exist.
- Can I switch models later?
- Yes. Every model uses the same TokenRex API key and endpoint, so switching is a one-line change to the model ID.
- Do prices include a markup?
- Prices shown are the live TokenRex rates billed from your wallet. They update automatically when provider prices change.