Best AI models for autonomous agents
Agents call tools, plan over many steps and recover from errors. Strong tool-using models keep agents on track.
Flagship models first
Live TokenRex prices. Per 1M tokens for chat and embeddings; per unit for media.
| # | Model | Input | Output / unit | Web search / 1K |
|---|---|---|---|---|
| 1 | Claude Fable 5.1 claude-fable-5-1 | $10.00 | $50.00 | $10.00 |
| 2 | GPT-6 Astra gpt-6-astra | $10.00 | $50.00 | $10.00 |
| 3 | Claude Opus 5 claude-opus-5 | $5.00 | $25.00 | $10.00 |
| 4 | Claude Opus 5.5 claude-opus-5-5 | $4.00 | $20.00 | $10.00 |
| 5 | GPT-5.6 Sol gpt-5.6-sol | $4.00 | $20.00 | $10.00 |
| 6 | Claude Sonnet 5 claude-sonnet-5 | $2.00 | $10.00 | $10.00 |
| 7 | Gemini 4 Argon gemini-4-argon | $2.00 | $10.00 | $14.00 |
| 8 | GPT-6 Sol gpt-6-sol | $2.00 | $10.00 | $10.00 |
| 9 | GPT-6.1 Sol gpt-6.1-sol | $2.00 | $10.00 | $10.00 |
How to choose
- Use a flagship model as the planner and a small one for simple tool calls.
- Cache long tool definitions to cut repeated input cost.
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":"claude-fable-5-1","messages":[{"role":"user","content":"Hello"}]}'Head-to-head comparisons
Questions
- How are these agent 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 We do not publish invented quality scores; open a model page for source-linked benchmarks where they exist.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.