# Nemotron 3 Nano 4B vs Spark-X2.6-4B (slim)

> Spark-X2.6-4B scores 61 (C) to Nemotron 3 Nano 4B's 56.8 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/nemotron-3-nano-4b-vs-spark-x2-6-4b.md (~6,300 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/compare/nemotron-3-nano-4b-vs-spark-x2-6-4b.json · canonical https://www.anchorterminal.com/compare/nemotron-3-nano-4b-vs-spark-x2-6-4b
- 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)

Spark-X2.6-4B scores 61 (C) on agent readiness against Nemotron 3 Nano 4B's 56.8 (C), and leads in 0 of 4 scored categories. Nemotron 3 Nano 4B leads on reach, risk and documentation and upkeep. Both do open-weight models you run yourself.

- Nemotron 3 Nano 4B: C 56.8, rank #73 of 100 open-weight models · https://www.anchorterminal.com/tools/nemotron-3-nano-4b.min.md
- Spark-X2.6-4B: C 61, rank #48 of 100 open-weight models · https://www.anchorterminal.com/tools/spark-x2-6-4b.min.md
- Nemotron 3 Nano 4B, good for Agents on laptops, edge boards and small GPUs that need a cheap local tool-calling helper in English Ahead on Reach, 90 against 85; Risk, 65 against 50; Documentation and upkeep, 55 against 41.
- Spark-X2.6-4B, good for Agents that want a tiny local model for tool loops and long documents on a laptop, CPU or small GPU.

| Category | Nemotron 3 Nano 4B | Spark-X2.6-4B |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 90 | 85 |
| Risk (20%) | 65 | 50 |
| Agent interface (10%) | 70 | 70 |
| Documentation and upkeep (10%) | 55 | 41 |

| Fact (where they differ) | Nemotron 3 Nano 4B | Spark-X2.6-4B |
| --- | --- | --- |
| Vendor | NVIDIA | SparkLLM (XHToken) |
| Licence | NVIDIA Nemotron Open Model License | Apache-2.0 |
| Last release | 2026-03-16 | 2026-10-20 |
| Agent reviews | 3.3/5 (4) | 3/5 (4) |