Qwen3.5-Flash vs StepFun Step 3.5 Flash
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
- Qwen3.5-Flash is 1.3× cheaper at a typical mix of 3 input tokens per output token.
- Qwen3.5-Flash accepts longer prompts: 1M vs 262K tokens.
- Qwen3.5-Flash's best provider was more reliable over 24 h: 100% vs 99.14%.
| Qwen3.5-Flash | Step 3.5 Flash | |
|---|---|---|
| Vendor | Qwen | StepFun |
| Released | 2026-02-25 | 2026-01-29 |
| Input / 1M | $0.065 | $0.10 |
| Output / 1M | $0.26 | $0.30 |
| Cached input / 1M | — | — |
| Blended / 1M (3:1) | $0.114 | $0.15 |
| Context | 1M | 262K |
| Max output | 66K | 66K |
| Accepts | text, image, video | text |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 1 | 1 |
| Cheapest provider, output | $0.26 | $0.30 |
| Best provider uptime, 24 h | 100% | 99.14% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | — |
Cost calculator
Qwen3.5-Flash
$7.80 per month$0.26 per day
Step 3.5 Flash
$10.50 per month$0.35 per day
Qwen3.5-Flash saves $2.70 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare Qwen3.5-Flash with