chore: import upstream snapshot with attribution

providers/stepfun/models/step-1-32k.toml

@@ -0,0 +1,25 @@
+name = "Step 1 (32K)"
+description = "StepFun flash model for efficient multimodal reasoning, coding, and tool use"
+release_date = "2025-01-01"
+last_updated = "2026-02-13"
+attachment = false
+reasoning = true
+reasoning_options = []
+temperature = true
+tool_call = true
+knowledge = "2024-06"
+open_weights = false
+
+[cost]
+input = 2.05
+output = 9.59
+cache_read = 0.41
+
+[limit]
+context = 32_768
+input = 32_768
+output = 32_768
+
+[modalities]
+input = ["text"]
+output = ["text"]

providers/stepfun/models/step-2-16k.toml

@@ -0,0 +1,25 @@
+name = "Step 2 (16K)"
+description = "StepFun flash model for efficient multimodal reasoning, coding, and tool use"
+release_date = "2025-01-01"
+last_updated = "2026-02-13"
+attachment = false
+reasoning = true
+reasoning_options = []
+temperature = true
+tool_call = true
+knowledge = "2024-06"
+open_weights = false
+
+[cost]
+input = 5.21
+output = 16.44
+cache_read = 1.04
+
+[limit]
+context = 16_384
+input = 16_384
+output = 8_192
+
+[modalities]
+input = ["text"]
+output = ["text"]

providers/stepfun/models/step-3.5-flash-2603.toml

@@ -0,0 +1,34 @@
+name = "Step 3.5 Flash 2603"
+description = "StepFun flash model for efficient multimodal reasoning, coding, and tool use"
+release_date = "2026-04-02"
+last_updated = "2026-04-02"
+attachment = false
+reasoning = true
+temperature = true
+tool_call = true
+knowledge = "2025-01"
+open_weights = true
+
+# Chat `reasoning_effort` and Messages `output_config.effort` accept low/high
+# (accessed 2026-06-25).
+# https://platform.stepfun.com/docs/zh/guides/models/step-3.5-flash
+[[reasoning_options]]
+type = "effort"
+values = ["low", "high"]
+
+[interleaved]
+field = "reasoning_content"
+
+[cost]
+input = 0.10
+output = 0.30
+cache_read = 0.02
+
+[limit]
+context = 256_000
+input = 256_000
+output = 256_000
+
+[modalities]
+input = ["text"]
+output = ["text"]

providers/stepfun/models/step-3.5-flash.toml

@@ -0,0 +1,28 @@
+name = "Step 3.5 Flash"
+description = "StepFun flash lane for quick multimodal reasoning and coding assistance"
+release_date = "2026-01-29"
+last_updated = "2026-06-15"
+attachment = false
+reasoning = true
+reasoning_options = []
+temperature = true
+tool_call = true
+knowledge = "2025-01"
+open_weights = true
+
+[interleaved]
+field = "reasoning_content"
+
+[cost]
+input = 0.1
+output = 0.3
+cache_read = 0.02
+
+[limit]
+context = 256_000
+input = 256_000
+output = 256_000
+
+[modalities]
+input = ["text"]
+output = ["text"]

providers/stepfun/models/step-3.7-flash.toml

@@ -0,0 +1,17 @@
+base_model = "stepfun/step-3.7-flash"
+last_updated = "2026-06-29"
+
+# Chat `reasoning_effort`, Messages `output_config.effort`, and Responses
+# `reasoning.effort` accept low/medium/high (accessed 2026-06-25).
+# https://platform.stepfun.com/docs/zh/guides/models/step-3.7-flash
+[[reasoning_options]]
+type = "effort"
+values = ["low", "medium", "high"]
+
+[interleaved]
+field = "reasoning_content"
+
+[cost]
+input = 0.2
+output = 1.15
+cache_read = 0.04

providers/stepfun/models/step-tts-2.toml

@@ -0,0 +1,18 @@
+name = "Step TTS 2"
+description = "Speech generation model for controllable voice, narration, and audio delivery"
+family = "step"
+release_date = "2026-03-01"
+last_updated = "2026-07-02"
+attachment = false
+reasoning = false
+temperature = false
+tool_call = false
+open_weights = false
+
+[limit]
+context = 0
+output = 0
+
+[modalities]
+input = ["text"]
+output = ["audio"]

providers/stepfun/models/stepaudio-2.5-asr.toml

@@ -0,0 +1,18 @@
+name = "StepAudio 2.5 ASR"
+description = "Speech transcription model for accurate audio-to-text and captioning workflows"
+family = "step"
+release_date = "2026-04-24"
+last_updated = "2026-07-02"
+attachment = false
+reasoning = false
+temperature = false
+tool_call = false
+open_weights = false
+
+[limit]
+context = 0
+output = 0
+
+[modalities]
+input = ["audio"]
+output = ["text"]

providers/stepfun/models/stepaudio-2.5-tts.toml

@@ -0,0 +1,18 @@
+name = "StepAudio 2.5 TTS"
+description = "Speech generation model for controllable voice, narration, and audio delivery"
+family = "step"
+release_date = "2026-04-16"
+last_updated = "2026-07-02"
+attachment = false
+reasoning = false
+temperature = false
+tool_call = false
+open_weights = false
+
+[limit]
+context = 0
+output = 0
+
+[modalities]
+input = ["text"]
+output = ["audio"]