Qwen: Qwen3.5 Plus 2026-04-20 API Pricing
Qwen: Qwen3.5 Plus 2026-04-20 costs $0.300 per 1M input tokens and $1.80 per 1M output tokens. Context window: 1M. Prices verified 2026-10-21 · source
Alternatives to consider
Rebuilt daily from our snapshot archive — the chart appears once a model has 5+ snapshots of history.
From our own daily snapshot archive — independent of provider announcements.
Token economics
| Token type | Price | vs base input |
|---|---|---|
| Standard input | $0.300 | — |
| Cache write (5m) | $0.375 | +25% |
| Output | $1.80 | — |
Prompt caching stores repeated context server-side: reads cost far less, but writes carry a one-time premium.
Higher effort = deeper thinking = more reasoning tokens billed as output.
What would Qwen: Qwen3.5 Plus 2026-04-20 cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $9.60 |
| Coding agent | 5,000 | 8,000 / 2,000 | $30.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $63.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $15.60 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Qwen: Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus (April 2026) is a large-scale multimodal language model from Alibaba. It accepts text, image, and video input and produces text output, with a 1M token context window. This...
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Frequently asked questions
How much does Qwen: Qwen3.5 Plus 2026-04-20 cost?
Qwen: Qwen3.5 Plus 2026-04-20 costs $0.300 per 1M input tokens and $1.80 per 1M output tokens. Verified 2026-10-21 — provider source.
What is the context window?
1M tokens, with up to 66K output tokens per response. That's roughly 1250 pages of text in a single request.
Does it support prompt caching?
Prompt-caching pricing is not published for this model via OpenRouter.
What's a cheaper alternative?
ScaleDown: Summarize saves about 96% on a typical workload with comparable quality.
Official resources
- Qwen: Qwen3.5 Plus 2026-04-20 on OpenRouter — live endpoint, pricing source of record.
- Artificial Analysis leaderboard → — independent intelligence and performance rankings.
- Qwen GitHub → — official model repositories and release notes.
- Shred your current bill — paste a CSV and see if switching saves money.