diff --git a/src/tau_coding/data/catalog.toml b/src/tau_coding/data/catalog.toml
index 65d2f8327..a15a96a04 100644
--- a/src/tau_coding/data/catalog.toml
+++ b/src/tau_coding/data/catalog.toml
@@ -6170,3 +6170,167 @@ context_window = 1048576
 max_tokens = 131072
 compat = { requiresReasoningContentOnAssistantMessages = true, thinkingFormat = "deepseek" }
 cost = { input = 1, output = 3, cacheRead = 0.2, cacheWrite = 0 }
+
+[[providers]]
+name = "stepfun"
+display_name = "StepFun"
+kind = "openai-compatible"
+base_url = "https://api.stepfun.ai/v1"
+api_key_env = "STEPFUN_API_KEY"
+credential_name = "stepfun"
+models = ["step-3.7-flash", "step-3.5-flash", "step-3.5-flash-2603"]
+default_model = "step-3.7-flash"
+docs_url = "https://platform.stepfun.ai/docs"
+api = "openai-completions"
+thinking_levels = ["low", "medium", "high"]
+thinking_default = "medium"
+thinking_parameter = "reasoning_effort"
+
+[providers.context_windows]
+"step-3.7-flash" = 262144
+"step-3.5-flash" = 262144
+"step-3.5-flash-2603" = 262144
+
+[providers.model_metadata."step-3.7-flash"]
+name = "Step 3.7 Flash"
+reasoning = true
+input = ["text", "image"]
+context_window = 262144
+cost = { input = 0.2, output = 1.15, cacheRead = 0.04, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash"]
+name = "Step 3.5 Flash"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash-2603"]
+name = "Step 3.5 Flash (2603)"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
+
+[[providers]]
+name = "stepfun-cn"
+display_name = "StepFun (China)"
+kind = "openai-compatible"
+base_url = "https://api.stepfun.com/v1"
+api_key_env = "STEPFUN_CN_API_KEY"
+credential_name = "stepfun-cn"
+models = ["step-3.7-flash", "step-3.5-flash", "step-3.5-flash-2603"]
+default_model = "step-3.7-flash"
+docs_url = "https://platform.stepfun.com/docs"
+api = "openai-completions"
+thinking_levels = ["low", "medium", "high"]
+thinking_default = "medium"
+thinking_parameter = "reasoning_effort"
+
+[providers.context_windows]
+"step-3.7-flash" = 262144
+"step-3.5-flash" = 262144
+"step-3.5-flash-2603" = 262144
+
+[providers.model_metadata."step-3.7-flash"]
+name = "Step 3.7 Flash"
+reasoning = true
+input = ["text", "image"]
+context_window = 262144
+cost = { input = 0.2, output = 1.15, cacheRead = 0.04, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash"]
+name = "Step 3.5 Flash"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash-2603"]
+name = "Step 3.5 Flash (2603)"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
+
+[[providers]]
+name = "stepfun-step-plan"
+display_name = "StepFun Step Plan"
+kind = "openai-compatible"
+base_url = "https://api.stepfun.ai/step_plan/v1"
+api_key_env = "STEPFUN_STEP_PLAN_API_KEY"
+credential_name = "stepfun-step-plan"
+models = ["step-3.7-flash", "step-3.5-flash", "step-3.5-flash-2603"]
+default_model = "step-3.7-flash"
+docs_url = "https://platform.stepfun.ai/docs/en/step-plan/overview"
+api = "openai-completions"
+thinking_levels = ["low", "medium", "high"]
+thinking_default = "medium"
+thinking_parameter = "reasoning_effort"
+
+[providers.context_windows]
+"step-3.7-flash" = 262144
+"step-3.5-flash" = 262144
+"step-3.5-flash-2603" = 262144
+
+[providers.model_metadata."step-3.7-flash"]
+name = "Step 3.7 Flash"
+reasoning = true
+input = ["text", "image"]
+context_window = 262144
+cost = { input = 0.2, output = 1.15, cacheRead = 0.04, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash"]
+name = "Step 3.5 Flash"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash-2603"]
+name = "Step 3.5 Flash (2603)"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
+
+[[providers]]
+name = "stepfun-step-plan-cn"
+display_name = "StepFun Step Plan (China)"
+kind = "openai-compatible"
+base_url = "https://api.stepfun.com/step_plan/v1"
+api_key_env = "STEPFUN_STEP_PLAN_CN_API_KEY"
+credential_name = "stepfun-step-plan-cn"
+models = ["step-3.7-flash", "step-3.5-flash", "step-3.5-flash-2603"]
+default_model = "step-3.7-flash"
+docs_url = "https://platform.stepfun.com/docs/zh/step-plan/overview"
+api = "openai-completions"
+thinking_levels = ["low", "medium", "high"]
+thinking_default = "medium"
+thinking_parameter = "reasoning_effort"
+
+[providers.context_windows]
+"step-3.7-flash" = 262144
+"step-3.5-flash" = 262144
+"step-3.5-flash-2603" = 262144
+
+[providers.model_metadata."step-3.7-flash"]
+name = "Step 3.7 Flash"
+reasoning = true
+input = ["text", "image"]
+context_window = 262144
+cost = { input = 0.2, output = 1.15, cacheRead = 0.04, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash"]
+name = "Step 3.5 Flash"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
+
+[providers.model_metadata."step-3.5-flash-2603"]
+name = "Step 3.5 Flash (2603)"
+reasoning = true
+input = ["text"]
+context_window = 262144
+cost = { input = 0.1, output = 0.3, cacheRead = 0.02, cacheWrite = 0 }
diff --git a/tests/test_provider_catalog.py b/tests/test_provider_catalog.py
index c87205258..ab0728019 100644
--- a/tests/test_provider_catalog.py
+++ b/tests/test_provider_catalog.py
@@ -72,6 +72,10 @@ def test_builtin_catalog_matches_expected_providers() -> None:
         "xiaomi-token-plan-cn",
         "xiaomi-token-plan-ams",
         "xiaomi-token-plan-sgp",
+        "stepfun",
+        "stepfun-cn",
+        "stepfun-step-plan",
+        "stepfun-step-plan-cn",
     ]
 
 
diff --git a/tests/test_provider_config.py b/tests/test_provider_config.py
index 510c28a7f..3467d2645 100644
--- a/tests/test_provider_config.py
+++ b/tests/test_provider_config.py
@@ -58,6 +58,10 @@ def test_load_provider_settings_missing_file_uses_openai_default(tmp_path: Path)
         "xiaomi-token-plan-cn",
         "xiaomi-token-plan-ams",
         "xiaomi-token-plan-sgp",
+        "stepfun",
+        "stepfun-cn",
+        "stepfun-step-plan",
+        "stepfun-step-plan-cn",
     ]
     assert settings.providers[0].default_model == DEFAULT_MODEL
     assert settings.get_provider("anthropic").api_key_env == "ANTHROPIC_API_KEY"