# Agents-A1-4B vs Carbon-X (slim)

> Agents-A1-4B and Carbon-X score within a point of each other for open-weight models you run yourself, 61 and 61 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/agents-a1-4b-vs-carbon-x.md (~5,950 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/compare/agents-a1-4b-vs-carbon-x.json · canonical https://www.anchorterminal.com/compare/agents-a1-4b-vs-carbon-x
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-23
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Agents-A1-4B and Carbon-X score within a point of each other on agent readiness, 61 (C) and 61 (C). Carbon-X leads on risk and documentation and upkeep. Both do open-weight models you run yourself.

- Agents-A1-4B: C 61, rank #35 of 107 open-weight models · https://www.anchorterminal.com/tools/agents-a1-4b.min.md
- Carbon-X: C 61, rank #38 of 107 open-weight models · https://www.anchorterminal.com/tools/carbon-x.min.md
- Agents-A1-4B, good for Local agent loops (search, research, tool calls) on a laptop, a small GPU or a phone-class machine, under a plain licence Ahead on Agent interface, 70 against 35.
- Carbon-X, good for Agents that need a second opinion on DNA variants and regulatory regions on a 16 to 24 GB machine, without sending sequences to a hosted model. Ahead on Risk, 65 against 55; Documentation and upkeep, 77 against 43.

| Category | Agents-A1-4B | Carbon-X |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 90 | 90 |
| Risk (20%) | 55 | 65 |
| Agent interface (10%) | 70 | 35 |
| Documentation and upkeep (10%) | 43 | 77 |

| Fact (where they differ) | Agents-A1-4B | Carbon-X |
| --- | --- | --- |
| Vendor | InternScience (Shanghai AI Laboratory) | Hugging Face (HuggingFaceBio) |
| Last release | 2026-07-14 | 2026-10-22 |