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"]