Step models optimized for fast hosted reasoning. StepFun’s coding models on Kilo Code include Step 3.5 Flash. Use them across VS Code, JetBrains IDEs, Cursor, Windsurf, Trae, and the Kilo CLI — with pay-as-you-go pricing and no markup over the underlying provider rates.
Sorted by coding-index where published. Click any model for the full review with benchmarks, real-world Kilo usage, and provider-specific pricing.
StepFun
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
StepFun builds the Step model family with an emphasis on responsive hosted assistants and multimodal product use. In Kilo Code, Step flash-style models are best treated as fast iteration engines for lightweight coding edits, review passes, and sub-agent calls.
Pay-as-you-go, no markup over the underlying provider rates. Cheapest first.
| Model | Input / 1M | Output / 1M | Context | Coding index |
|---|---|---|---|---|
| StepFun: Step 3.5 Flash | $0.090 | $0.300 | 262K | — |
Two ways: hosted in Kilo with no setup, or through your own provider keys.
The fastest path: install Kilo Code, sign in, pick stepfun from the model picker. No API keys, no markup. Works in VS Code, JetBrains, Cursor, Windsurf, Trae, and the Kilo CLI.
See live model leaderboard →Already have an account with StepFun, OpenRouter, AWS Bedrock, Google Vertex, Together AI, or another compatible provider? Plug your key into Kilo Code and keep your existing billing relationship.
BYOK setup guide →See coding-model lineups from StepFun’s closest competitors.
StepFun’s flagship is among the strongest coding models on the Kilo Code leaderboard, ranked by Code, Plan, Ask, Debug, and Review usage.
VS Code, Cursor, Windsurf, Trae, JetBrains IDEs (IntelliJ, PyCharm, WebStorm, GoLand, RubyMine, Android Studio), and the Kilo CLI / terminal.
Switch between StepFun and 500+ other models with one click. Pay only for what you use, at the underlying provider rate.
Step 3.5 Flash is the current StepFun model in Kilo Code and is best for fast, lower-cost coding assistance.
StepFun models work across all Kilo-supported IDEs and the Kilo CLI.
Kilo Code shows StepFun token pricing directly from the provider with no markup.
No. StepFun models listed in Kilo Code are hosted API models.
Flash variants prioritize speed and cost over maximum reasoning depth, making them useful for quick edits and high-volume helper tasks.
StepFun models work across all Kilo-supported IDEs and the Kilo CLI.
Install Kilo Code and get instant access to StepFun: Step 3.5 Flash and 0 other StepFun models, plus 500+ frontier and open-source options. Free to start, no credit card required.