Step 3.5 Flash 2603 Pricing, Benchmarks & Channels
Step 3.5 Flash 2603 is a 2026-04-02 model from StepFun featuring a 256K context window and extended reasoning capabilities. Lowest rate on StepFun Official (CN) ($0.1046 in / $0.3138 out per 1M tokens).
Input Price / 1M
$0.10461
Output Price / 1M
$0.31384
Cache Read / 1M
$0.02092
Context Window
256K
Generation Speed
141 TPS
Access Grade
A · CN Direct
F.A.R.E. Four-Dimension Score Breakdown
Scenario Capability Breakdown (0–100):
💻 Coding
67/100
✍️ Writing
58/100
📚 Long-Doc RAG
59/100
👁️ Vision OCR
Text-only
F.A.R.E. CAPABILITY RADAR
Step 3.5 Flash 2603 Multi-Platform Price Comparison (1 Verified Channels)
All prices are in USD per 1M tokens. Domestic developers can prioritize channels marked "Direct in CN" for compliant access and local billing.
| Platform / Gateway | Network Access | Input ($/1M) | Output ($/1M) | Cache Hit ($/1M) | Billing & Notes | Link |
|---|---|---|---|---|---|---|
| StepFun Official (CN) Lowest Price | Direct in CN | $0.1046 | $0.3138 | $0.0209 | Direct CN access · RMB billing | Visit Official → |
✅ Core Strengths & Ideal Workloads
- Fast generation speed (~141 tokens/sec)
- Ultra-low token cost, ideal for high-volume batch workloads
- Direct access in mainland China with RMB enterprise billing
- Open weights available for private self-hosting (~20GB VRAM at INT4)
⚠️ Limitations & Practical Caveats
- Domestic Chinese frontier lab specializing in multimodal reasoning and fast flash models.
- Extended thinking generates internal reasoning tokens (~1.8x output multiplier)