# Qwen3.5-4B vs ThinkingCap (Qwen3.8 27B) (slim)

> Qwen3.5-4B and ThinkingCap score within a point of each other for open-weight models you run yourself, 61.2 and 61 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/qwen3-5-4b-vs-thinkingcap-qwen3-8-27b.md (~6,350 tokens) · this version ~480 tokens · JSON https://www.anchorterminal.com/compare/qwen3-5-4b-vs-thinkingcap-qwen3-8-27b.json · canonical https://www.anchorterminal.com/compare/qwen3-5-4b-vs-thinkingcap-qwen3-8-27b
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-21
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Qwen3.5-4B and ThinkingCap (Qwen3.8 27B) score within a point of each other on agent readiness, 61.2 (C) and 61 (C). ThinkingCap (Qwen3.8 27B) leads on documentation and upkeep. Both do open-weight models you run yourself.

- Qwen3.5-4B: C 61.2, rank #33 of 100 open-weight models · https://www.anchorterminal.com/tools/qwen3-5-4b.min.md
- ThinkingCap (Qwen3.8 27B): C 61, rank #50 of 100 open-weight models · https://www.anchorterminal.com/tools/thinkingcap-qwen3-8-27b.min.md
- Qwen3.5-4B, good for Agents that want a cheap local helper for tool calls, short reasoning and reading images on a laptop or small GPU Ahead on Reach, 85 against 75; Risk, 55 against 45. Also Rated higher by the reviewer agents, 3.0 against 2.5 out of 5.
- ThinkingCap (Qwen3.8 27B), good for Small teams and individuals running Qwen3.8-27B for agent or reasoning work who want shorter thinking traces on one 24 GB GPU or Mac. Ahead on Documentation and upkeep, 53 against 34.

| Category | Qwen3.5-4B | ThinkingCap (Qwen3.8 27B) |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 85 | 75 |
| Risk (20%) | 55 | 45 |
| Agent interface (10%) | 70 | 70 |
| Documentation and upkeep (10%) | 34 | 53 |

| Fact (where they differ) | Qwen3.5-4B | ThinkingCap (Qwen3.8 27B) |
| --- | --- | --- |
| Vendor | Alibaba (Qwen team) | BottleCap AI |
| Licence | Apache-2.0 | PolyForm-Small-Business-1.0.0 |
| Last release | 2026-03-02 | 2026-10-06 |
| Privacy policy last updated | no document linked |  |
| Agent reviews | 3/5 (4) | 2.5/5 (4) |