StepFun

StepFun

OpenClaw includes a bundled StepFun provider plugin with two provider ids:

• stepfun for the standard endpoint
• stepfun-plan for the Step Plan endpoint

The built-in catalogs currently differ by surface:

• Standard: step-3.5-flash
• Step Plan: step-3.5-flash, step-3.5-flash-2603

Region and endpoint overview

• China standard endpoint: https://api.stepfun.com/v1
• Global standard endpoint: https://api.stepfun.ai/v1
• China Step Plan endpoint: https://api.stepfun.com/step_plan/v1
• Global Step Plan endpoint: https://api.stepfun.ai/step_plan/v1
• Auth env var: STEPFUN_API_KEY

Use a China key with the .com endpoints and a global key with the .ai endpoints.

CLI setup

Interactive setup:

openclaw onboard

Choose one of these auth choices:

• stepfun-standard-api-key-cn
• stepfun-standard-api-key-intl
• stepfun-plan-api-key-cn
• stepfun-plan-api-key-intl

Non-interactive examples:

openclaw onboard --auth-choice stepfun-standard-api-key-intl --stepfun-api-key "$STEPFUN_API_KEY"
openclaw onboard --auth-choice stepfun-plan-api-key-intl --stepfun-api-key "$STEPFUN_API_KEY"

Model refs

• Standard default model: stepfun/step-3.5-flash
• Step Plan default model: stepfun-plan/step-3.5-flash
• Step Plan alternate model: stepfun-plan/step-3.5-flash-2603

Built-in catalogs

Standard (stepfun):

Model ref	Context	Max output	Notes
stepfun/step-3.5-flash	262,144	65,536	Default standard model

Step Plan (stepfun-plan):

Model ref	Context	Max output	Notes
stepfun-plan/step-3.5-flash	262,144	65,536	Default Step Plan model
stepfun-plan/step-3.5-flash-2603	262,144	65,536	Additional Step Plan model

Config snippets

Standard provider:

{
  env: { STEPFUN_API_KEY: "your-key" },
  agents: { defaults: { model: { primary: "stepfun/step-3.5-flash" } } },
  models: {
    mode: "merge",
    providers: {
      stepfun: {
        baseUrl: "https://api.stepfun.ai/v1",
        api: "openai-completions",
        apiKey: "${STEPFUN_API_KEY}",
        models: [
          {
            id: "step-3.5-flash",
            name: "Step 3.5 Flash",
            reasoning: true,
            input: ["text"],
            cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
            contextWindow: 262144,
            maxTokens: 65536,
          },
        ],
      },
    },
  },
}

Step Plan provider:

{
  env: { STEPFUN_API_KEY: "your-key" },
  agents: { defaults: { model: { primary: "stepfun-plan/step-3.5-flash" } } },
  models: {
    mode: "merge",
    providers: {
      "stepfun-plan": {
        baseUrl: "https://api.stepfun.ai/step_plan/v1",
        api: "openai-completions",
        apiKey: "${STEPFUN_API_KEY}",
        models: [
          {
            id: "step-3.5-flash",
            name: "Step 3.5 Flash",
            reasoning: true,
            input: ["text"],
            cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
            contextWindow: 262144,
            maxTokens: 65536,
          },
          {
            id: "step-3.5-flash-2603",
            name: "Step 3.5 Flash 2603",
            reasoning: true,
            input: ["text"],
            cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
            contextWindow: 262144,
            maxTokens: 65536,
          },
        ],
      },
    },
  },
}

Notes

• The provider is bundled with OpenClaw, so there is no separate plugin install step.
• step-3.5-flash-2603 is currently exposed only on stepfun-plan.
• A single auth flow writes region-matched profiles for both stepfun and stepfun-plan, so both surfaces can be discovered together.
• Use openclaw models list and openclaw models set <provider/model> to inspect or switch models.
• For the broader provider overview, see Model providers.