Step 3.5 Flash
StepFun AIOpen weights
Step 3.5 Flash by StepFun AI costs $0.10 per 1M input tokens and $0.30 per 1M output tokens, with a 256K-token context window.
Pricing
Input (per 1M tokens)
$0.10
Output (per 1M tokens)
$0.30
Cached input (per 1M)
$0.02
Specifications
- Provider
- StepFun AI
- Context window
- 256K tokens
- Parameters
- —
- Released
- Jan 2026
- Open weights
- Yes
- Frontier model
- No
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FAQ
Pricing is per 1M tokens (USD); confirm with the provider before production use.