DeepSeek V4 Pro 0813 vs Qwen3.5 Plus 2026-04-20
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 Plus 2026-04-20 is 1.5× cheaper at a typical mix of 3 input tokens per output token.
- Both accept prompts up to 1M tokens.
- DeepSeek V4 Pro 0813 output costs $0.681 per 1M via Baidu, against the list price of $1.98.
- DeepSeek V4 Pro 0813 is the newer model (released 2026-08-12).
| DeepSeek V4 Pro 0813 | Qwen3.5 Plus 2026-04-20 | |
|---|---|---|
| Vendor | DeepSeek | Qwen |
| Released | 2026-08-12 | 2026-04-27 |
| Input / 1M | $0.66 | $0.30 |
| Output / 1M | $1.98 | $1.80 |
| Cached input / 1M | $0.022 | — |
| Blended / 1M (3:1) | $0.99 | $0.675 |
| Context | 1M | 1M |
| Max output | 393K | 66K |
| Accepts | text | text, image, video |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 25 | 1 |
| Cheapest provider, output | $0.681 | $1.80 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | Operational |
Cost calculator
DeepSeek V4 Pro 0813
$69.30 per month$2.31 per day
Qwen3.5 Plus 2026-04-20
$45.00 per month$1.50 per day
Qwen3.5 Plus 2026-04-20 saves $24.30 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare DeepSeek V4 Pro 0813 with
Compare Qwen3.5 Plus 2026-04-20 with