Synthetic exposes Anthropic-compatible endpoints.
OpenClaw registers it as the synthetic provider and uses the Anthropic
Messages API.
| Property | Value |
|---|---|
| Provider | synthetic |
| Auth | SYNTHETIC_API_KEY |
| API | Anthropic Messages |
| Base URL | https://api.synthetic.new/anthropic |
Getting started
Config example
{
env: { SYNTHETIC_API_KEY: "sk-..." },
agents: {
defaults: {
model: { primary: "synthetic/hf:MiniMaxAI/MiniMax-M2.5" },
models: { "synthetic/hf:MiniMaxAI/MiniMax-M2.5": { alias: "MiniMax M2.5" } },
},
},
models: {
mode: "merge",
providers: {
synthetic: {
baseUrl: "https://api.synthetic.new/anthropic",
apiKey: "${SYNTHETIC_API_KEY}",
api: "anthropic-messages",
models: [
{
id: "hf:MiniMaxAI/MiniMax-M2.5",
name: "MiniMax M2.5",
reasoning: false,
input: ["text"],
cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
contextWindow: 192000,
maxTokens: 65536,
},
],
},
},
},
}
Built-in catalog
All Synthetic models use cost 0 (input/output/cache).
| Model ID | Context window | Max tokens | Reasoning | Input |
|---|---|---|---|---|
hf:MiniMaxAI/MiniMax-M2.5 | 192,000 | 65,536 | no | text |
hf:moonshotai/Kimi-K2-Thinking | 256,000 | 8,192 | yes | text |
hf:zai-org/GLM-4.7 | 198,000 | 128,000 | no | text |
hf:deepseek-ai/DeepSeek-R1-0528 | 128,000 | 8,192 | no | text |
hf:deepseek-ai/DeepSeek-V3-0324 | 128,000 | 8,192 | no | text |
hf:deepseek-ai/DeepSeek-V3.1 | 128,000 | 8,192 | no | text |
hf:deepseek-ai/DeepSeek-V3.1-Terminus | 128,000 | 8,192 | no | text |
hf:deepseek-ai/DeepSeek-V3.2 | 159,000 | 8,192 | no | text |
hf:meta-llama/Llama-3.3-70B-Instruct | 128,000 | 8,192 | no | text |
hf:meta-llama/Llama-4-Maverick-17B-128E-Instruct-FP8 | 524,000 | 8,192 | no | text |
hf:moonshotai/Kimi-K2-Instruct-0905 | 256,000 | 8,192 | no | text |
hf:moonshotai/Kimi-K2.5 | 256,000 | 8,192 | yes | text + image |
hf:openai/gpt-oss-120b | 128,000 | 8,192 | no | text |
hf:Qwen/Qwen3-235B-A22B-Instruct-2507 | 256,000 | 8,192 | no | text |
hf:Qwen/Qwen3-Coder-480B-A35B-Instruct | 256,000 | 8,192 | no | text |
hf:Qwen/Qwen3-VL-235B-A22B-Instruct | 250,000 | 8,192 | no | text + image |
hf:zai-org/GLM-4.5 | 128,000 | 128,000 | no | text |
hf:zai-org/GLM-4.6 | 198,000 | 128,000 | no | text |
hf:zai-org/GLM-5 | 256,000 | 128,000 | yes | text + image |
hf:deepseek-ai/DeepSeek-V3 | 128,000 | 8,192 | no | text |
hf:Qwen/Qwen3-235B-A22B-Thinking-2507 | 256,000 | 8,192 | yes | text |
```json5
{
models: {
providers: {
synthetic: {
baseUrl: "https://new-api.synthetic.new/anthropic",
},
},
},
}
```
Remember that OpenClaw appends `/v1` automatically.