Qwen3.5-4B
Qwen3.5-4B is a mid-size model from Alibaba's Qwen3.5 series that delivers a strong balance of performance and efficiency.
text + image → text · made by Alibaba
Sold by 4 ways
| Seller | Lane | Rate |
|---|---|---|
| Thinking Machines Lab api | training | $0.33per Mtok in$1per Mtok out$0.066per Mtok cachedtinker-docs.thinkingmachines.ai · read 2026-08-25 |
| DeepInfra aggregator | standard | $0.03per Mtok in$0.15per Mtok outapi.deepinfra.com · read 2026-08-25 |
| Requesty aggregator | runware | $0.05per Mtok in$0.07per Mtok out$0.005per Mtok cachedrouter.requesty.ai · read 2026-09-20 |
| Featherless AI aggregator | standard | $0.1per Mtok in$0.2per Mtok outapi.featherless.ai · read 2026-09-20 |
Measured 2 standings
| Place | Board | Metric | Score |
|---|---|---|---|
| 185thof 306 | OTIS Mock AIME 2024-2025 | mean_score (none) | 55.833 |
| 246thof 260 | Critpt — Epoch AI | Accuracy (none) | 0 |
About
Qwen3.5-4B — a text model from Alibaba, sold by 4 companies from $0.03 in and $0.15 out per million tokens, placed 185th of 306 on OTIS Mock AIME 2024-2025.
It takes text and images and returns text, with a context window of 32,768 tokens. It was published in November 2025, trained on material up to April 2025. Its sellers say it can reason step by step and call a tool. The catalogue files it under reasoning. Four companies sell it. The cheapest is $0.03 in and $0.15 out per million tokens at DeepInfra. Beside the standard rate there is a separately routed lane. It has been measured on 2 boards, and stands best at 185th of 306 on OTIS Mock AIME 2024-2025.
Every current figure
- Maker
- Alibaba
- Register
- model
- Takes
- text + image
- Returns
- text
- Context
- 32,768 tokens
- Published
- November 2025
- Knowledge to
- April 2025
- Parameters
- 4 billion · read from its own name
- Licence
- not read
- Sellers
- 4
- Maker's own price
- not read
- Price
- $0.03 in and $0.15 out per million tokens — DeepInfra
- Boards
- 2
- Best place
- 185th of 306 — OTIS Mock AIME 2024-2025
Known as 2 names
Qwen/Qwen3.5-4Brunware/qwen3.5-4b