---
summary: "Use Synthetic's Anthropic-compatible API in InfiniBot"
read_when:
  - You want to use Synthetic as a model provider
  - You need a Synthetic API key or base URL setup
---
# Synthetic

Synthetic exposes Anthropic-compatible endpoints. InfiniBot registers it as the
`synthetic` provider and uses the Anthropic Messages API.

## Quick setup

1) Set `SYNTHETIC_API_KEY` (or run the wizard below).
2) Run onboarding:

```bash
infinibot onboard --auth-choice synthetic-api-key
```

The default model is set to:

```
synthetic/hf:MiniMaxAI/MiniMax-M2.1
```

## Config example

```json5
{
  env: { SYNTHETIC_API_KEY: "sk-..." },
  agents: {
    defaults: {
      model: { primary: "synthetic/hf:MiniMaxAI/MiniMax-M2.1" },
      models: { "synthetic/hf:MiniMaxAI/MiniMax-M2.1": { alias: "MiniMax M2.1" } }
    }
  },
  models: {
    mode: "merge",
    providers: {
      synthetic: {
        baseUrl: "https://api.synthetic.new/anthropic",
        apiKey: "${SYNTHETIC_API_KEY}",
        api: "anthropic-messages",
        models: [
          {
            id: "hf:MiniMaxAI/MiniMax-M2.1",
            name: "MiniMax M2.1",
            reasoning: false,
            input: ["text"],
            cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
            contextWindow: 192000,
            maxTokens: 65536
          }
        ]
      }
    }
  }
}
```

Note: InfiniBot's Anthropic client appends `/v1` to the base URL, so use
`https://api.synthetic.new/anthropic` (not `/anthropic/v1`). If Synthetic changes
its base URL, override `models.providers.synthetic.baseUrl`.

## Model catalog

All models below use cost `0` (input/output/cache).

| Model ID | Context window | Max tokens | Reasoning | Input |
| --- | --- | --- | --- | --- |
| `hf:MiniMaxAI/MiniMax-M2.1` | 192000 | 65536 | false | text |
| `hf:moonshotai/Kimi-K2-Thinking` | 256000 | 8192 | true | text |
| `hf:zai-org/GLM-4.7` | 198000 | 128000 | false | text |
| `hf:deepseek-ai/DeepSeek-R1-0528` | 128000 | 8192 | false | text |
| `hf:deepseek-ai/DeepSeek-V3-0324` | 128000 | 8192 | false | text |
| `hf:deepseek-ai/DeepSeek-V3.1` | 128000 | 8192 | false | text |
| `hf:deepseek-ai/DeepSeek-V3.1-Terminus` | 128000 | 8192 | false | text |
| `hf:deepseek-ai/DeepSeek-V3.2` | 159000 | 8192 | false | text |
| `hf:meta-llama/Llama-3.3-70B-Instruct` | 128000 | 8192 | false | text |
| `hf:meta-llama/Llama-4-Maverick-17B-128E-Instruct-FP8` | 524000 | 8192 | false | text |
| `hf:moonshotai/Kimi-K2-Instruct-0905` | 256000 | 8192 | false | text |
| `hf:openai/gpt-oss-120b` | 128000 | 8192 | false | text |
| `hf:Qwen/Qwen3-235B-A22B-Instruct-2507` | 256000 | 8192 | false | text |
| `hf:Qwen/Qwen3-Coder-480B-A35B-Instruct` | 256000 | 8192 | false | text |
| `hf:Qwen/Qwen3-VL-235B-A22B-Instruct` | 250000 | 8192 | false | text + image |
| `hf:zai-org/GLM-4.5` | 128000 | 128000 | false | text |
| `hf:zai-org/GLM-4.6` | 198000 | 128000 | false | text |
| `hf:deepseek-ai/DeepSeek-V3` | 128000 | 8192 | false | text |
| `hf:Qwen/Qwen3-235B-A22B-Thinking-2507` | 256000 | 8192 | true | text |

## Notes

- Model refs use `synthetic/<modelId>`.
- If you enable a model allowlist (`agents.defaults.models`), add every model you
  plan to use.
- See [Model providers](/concepts/model-providers) for provider rules.
