StepFun Step 3.5 Flash vs Tencent Hy3
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Step 3.5 Flash is 1.5× cheaper at a typical mix of 3 input tokens per output token.
- Both accept prompts up to 262K tokens.
- Hy3 output costs $0.33 per 1M via Tencent, against the list price of $0.528.
- Hy3's best provider was more reliable over 24 h: 100% vs 99.22%.
- Hy3 is the newer model (released 2026-07-06).
| Step 3.5 Flash | Hy3 | |
|---|---|---|
| Vendor | StepFun | Tencent |
| Released | 2026-01-29 | 2026-07-06 |
| Input / 1M | $0.10 | $0.132 |
| Output / 1M | $0.30 | $0.528 |
| Cached input / 1M | — | $0.033 |
| Blended / 1M (3:1) | $0.15 | $0.231 |
| Context | 262K | 262K |
| Max output | 66K | 128K |
| Accepts | text | text |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 1 | 5 |
| Cheapest provider, output | $0.30 | $0.33 |
| Best provider uptime, 24 h | 99.22% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | — | — |
Cost calculator
Step 3.5 Flash
$10.50 per month$0.35 per day
Hy3
$15.84 per month$0.53 per day
Step 3.5 Flash saves $5.34 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare Step 3.5 Flash with