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feat(stepfun): add step-3.7-flash model (#88082)
* feat(stepfun): add step-3.7-flash model and make it default * fix(stepfun): set step-3.7-flash cacheRead cost to 0.04 * fix(stepfun): raise step-3.7-flash maxTokens to context limit Output was artificially capped at 65536; StepFun docs set max_tokens default to INF, bounded only by the 256K context window. Raise step-3.7-flash maxTokens to 262144 on both stepfun and stepfun-plan, matching contextWindow. Per models.dev anomalyco/models.dev#1903. step-3.5-flash entries unchanged. * fix(stepfun): zero step-plan step-3.7-flash cost for plan billing Step Plan endpoint bills per subscription plan, not per token, matching the sibling stepfun-plan/step-3.5-flash and step-3.5-flash-2603 entries which already carry zero cost. Standard stepfun/step-3.7-flash keeps its per-token rate. Per models.dev anomalyco/models.dev#1903, whose step-plan providers omit cost entirely. * docs(changelog): note StepFun 3.7 support * style(stepfun): format provider table * fix(stepfun): forward reasoning effort * fix(stepfun): scope reasoning compat to 3.7 * test(stepfun): keep 3.5 reasoning compat unchanged * fix(stepfun): carry off fallback through agent turns * fix(stepfun): use documented token limit field * fix(stepfun): match chat completions contract * chore(stepfun): keep changelog release-owned --------- Co-authored-by: Tianning Li <litianning@stepfun.com> Co-authored-by: Peter Steinberger <steipete@gmail.com>
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Tianning Li
GitHub
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4 changed files with 248 additions and 10 deletions
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@ -35,16 +35,18 @@ Auth env var: `STEPFUN_API_KEY`
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Standard (`stepfun`):
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| Model ref | Context | Max output | Notes |
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| ------------------------ | ------- | ---------- | ---------------------- |
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| `stepfun/step-3.5-flash` | 262,144 | 65,536 | Default standard model |
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| Model ref | Context | Max output | Notes |
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| ------------------------ | ------- | ---------- | ------------------------------ |
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| `stepfun/step-3.5-flash` | 262,144 | 65,536 | Default standard model |
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| `stepfun/step-3.7-flash` | 262,144 | 262,144 | Multimodal image input support |
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Step Plan (`stepfun-plan`):
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| Model ref | Context | Max output | Notes |
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| ---------------------------------- | ------- | ---------- | -------------------------- |
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| `stepfun-plan/step-3.5-flash` | 262,144 | 65,536 | Default Step Plan model |
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| `stepfun-plan/step-3.5-flash-2603` | 262,144 | 65,536 | Additional Step Plan model |
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| Model ref | Context | Max output | Notes |
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| ---------------------------------- | ------- | ---------- | ------------------------------ |
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| `stepfun-plan/step-3.5-flash` | 262,144 | 65,536 | Default Step Plan model |
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| `stepfun-plan/step-3.7-flash` | 262,144 | 262,144 | Multimodal image input support |
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| `stepfun-plan/step-3.5-flash-2603` | 262,144 | 65,536 | Additional Step Plan model |
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## Getting started
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@ -84,6 +86,7 @@ Step Plan (`stepfun-plan`):
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</Steps>
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Default model: `stepfun/step-3.5-flash`
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Alternate model: `stepfun/step-3.7-flash`
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</Tab>
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@ -122,7 +125,7 @@ Step Plan (`stepfun-plan`):
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</Steps>
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Default model: `stepfun-plan/step-3.5-flash`
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Alternate model: `stepfun-plan/step-3.5-flash-2603`
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Alternate models: `stepfun-plan/step-3.7-flash`, `stepfun-plan/step-3.5-flash-2603`
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</Tab>
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</Tabs>
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@ -145,6 +148,36 @@ A single auth flow writes region-matched profiles for both `stepfun` and `stepfu
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api: "openai-completions",
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apiKey: "${STEPFUN_API_KEY}",
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models: [
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{
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id: "step-3.7-flash",
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name: "Step 3.7 Flash",
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reasoning: true,
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input: ["text", "image"],
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thinkingLevelMap: { off: "low", minimal: "low", xhigh: "high", max: "high" },
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cost: { input: 0.2, output: 1.15, cacheRead: 0.04, cacheWrite: 0 },
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contextWindow: 262144,
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maxTokens: 262144,
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compat: {
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supportsStore: false,
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supportsDeveloperRole: false,
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supportsUsageInStreaming: false,
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supportsReasoningEffort: true,
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supportsStrictMode: false,
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supportedReasoningEfforts: ["low", "medium", "high"],
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maxTokensField: "max_tokens",
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reasoningEffortMap: {
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off: "low",
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none: "low",
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minimal: "low",
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low: "low",
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medium: "medium",
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high: "high",
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xhigh: "high",
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adaptive: "high",
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max: "high",
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},
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},
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},
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{
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id: "step-3.5-flash",
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name: "Step 3.5 Flash",
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@ -175,6 +208,36 @@ A single auth flow writes region-matched profiles for both `stepfun` and `stepfu
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api: "openai-completions",
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apiKey: "${STEPFUN_API_KEY}",
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models: [
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{
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id: "step-3.7-flash",
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name: "Step 3.7 Flash",
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reasoning: true,
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input: ["text", "image"],
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thinkingLevelMap: { off: "low", minimal: "low", xhigh: "high", max: "high" },
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cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
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contextWindow: 262144,
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maxTokens: 262144,
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compat: {
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supportsStore: false,
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supportsDeveloperRole: false,
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supportsUsageInStreaming: false,
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supportsReasoningEffort: true,
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supportsStrictMode: false,
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supportedReasoningEfforts: ["low", "medium", "high"],
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maxTokensField: "max_tokens",
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reasoningEffortMap: {
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off: "low",
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none: "low",
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minimal: "low",
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low: "low",
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medium: "medium",
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high: "high",
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xhigh: "high",
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adaptive: "high",
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max: "high",
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},
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},
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},
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{
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id: "step-3.5-flash",
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name: "Step 3.5 Flash",
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@ -202,6 +265,8 @@ A single auth flow writes region-matched profiles for both `stepfun` and `stepfu
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</Accordion>
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<Accordion title="Notes">
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- `step-3.7-flash` accepts text and image input through OpenClaw. StepFun's API also supports video, which is not yet a model input modality in OpenClaw.
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- Step 3.7 supports `low`, `medium`, and `high` reasoning effort. Because the model has no non-reasoning mode, `/think off` maps to `low`.
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- `step-3.5-flash-2603` is currently exposed only on `stepfun-plan`.
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- Use `openclaw models list` and `openclaw models set <provider/model>` to inspect or switch models.
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