Step 3.5 Flash 2603 API Pricing
StepFun · released 2026-04-02
Also searched as: 3.5 Flash 2603 pricing
Step 3.5 Flash 2603 price
0.010¢ / 1K
0.030¢ / 1K
0.015¢ / 1K
What it actually costs
| Workload | Tokens | Cost |
|---|---|---|
| Short chat reply | 500 in / 300 out | 0.014¢ |
| RAG query | 4,000 in / 500 out | 0.055¢ |
| Long document summary | 50,000 in / 1,000 out | 0.53¢ |
| Code review of a 2k-line file | 30,000 in / 2,000 out | 0.36¢ |
| 1,000 chat replies/day for 30 days | 30,000 × (500 in / 300 out) | $4.20 |
Cost = (input tokens ÷ 1,000,000 × $0.10) + (output tokens ÷ 1,000,000 × $0.30).
Benchmarks
#162 of 547
Leaderboard neighbours
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Qwen3.5 122B A10B (Non-reasoning) | 17.7 | $1.10 |
| Muse Glimmer (High) | 17.5 | $0.525 |
| Ling-2.6-1T | 17.0 | $0.85 |
| Step 3.5 Flash 2603 | 17.0 | $0.15 |
| Claude 4.5 Haiku (Reasoning) | 16.9 | $2.00 |
| Doubao Seed Code | 16.9 | — |
| Gemma 4 26B A4B (Reasoning) | 16.7 | $0.175 |
More from StepFun
| Model | Intelligence | Blended $/1M |
|---|---|---|
| Step 5 Preview | 43.7 | $1.425 |
| Step 3.7 Flash | 19.5 | $0.438 |
| Step 3.5 Flash | 16.6 | $0.15 |
| Step3 VL 10B | 7.7 | — |
Count tokens & estimate cost for Step 3.5 Flash 2603 See Step 3.5 Flash 2603 on the leaderboard
Source: Artificial Analysis · last synced 2026-10-15
FAQ
Who develops Step 3.5 Flash 2603?
Step 3.5 Flash 2603 is developed by StepFun, released 2026-04-02.
How much does Step 3.5 Flash 2603 cost per million tokens?
Step 3.5 Flash 2603 costs $0.10 per 1M input tokens and $0.30 per 1M output tokens ($0.15 blended), per Artificial Analysis's official pricing data.
What is the Step 3.5 Flash 2603 API price?
The Step 3.5 Flash 2603 API price is $0.10 per 1M input tokens and $0.30 per 1M output tokens ($0.15 per 1M blended).
How much does Step 3.5 Flash 2603 cost for a typical request?
A short chat reply (500 in / 300 out tokens) costs about 0.014¢ on Step 3.5 Flash 2603, at $0.10/1M input and $0.30/1M output.
Is Step 3.5 Flash 2603 free?
Step 3.5 Flash 2603's official API list price is $0.10 per 1M input tokens and $0.30 per 1M output tokens. This site tracks list prices only, not free tiers or trial credits — check StepFun's site for those.
How does Step 3.5 Flash 2603 rank on benchmarks?
Step 3.5 Flash 2603 scores 17.0 on the Artificial Analysis Intelligence Index, ranking #162 of 547 models we track.
Where does this data come from?
Pricing and benchmark data for Step 3.5 Flash 2603 comes from Artificial Analysis (artificialanalysis.ai), synced daily. Last synced 2026-10-15.