# DeepSeek V4.1 Flash vs Nemotron 3 Ultra 550B A55B (slim)

> Nemotron 3 Ultra 550B A55B scores 68.8 (B) to DeepSeek V4.1 Flash's 59 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

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Nemotron 3 Ultra 550B A55B scores 68.8 (B) on agent readiness against DeepSeek V4.1 Flash's 59 (C), and leads in every scored category. Both do open-weight models you run yourself.

- DeepSeek V4.1 Flash: C 59, rank #63 of 100 open-weight models · https://www.anchorterminal.com/tools/deepseek-v4-1-flash.min.md
- Nemotron 3 Ultra 550B A55B: B 68.8, rank #9 of 100 open-weight models · https://www.anchorterminal.com/tools/nemotron-3-ultra-550b-a55b.min.md
- DeepSeek V4.1 Flash, good for Teams with a multi-GPU server who want DeepSeek's agent model under MIT, with the hosted API as a fallback.
- Nemotron 3 Ultra 550B A55B, good for Agents with a multi-GPU Blackwell or Hopper node, or using a hosted endpoint, that want NVIDIA's strongest open model for long agent runs Ahead on Reach, 55 against 50; Risk, 70 against 50; Agent interface, 90 against 75; Documentation and upkeep, 65 against 48.

| Category | DeepSeek V4.1 Flash | Nemotron 3 Ultra 550B A55B |
| --- | --- | --- |
| Capability (35%) | 69 | 73 |
| Reach (25%) | 50 | 55 |
| Risk (20%) | 50 | 70 |
| Agent interface (10%) | 75 | 90 |
| Documentation and upkeep (10%) | 48 | 65 |

| Fact (where they differ) | DeepSeek V4.1 Flash | Nemotron 3 Ultra 550B A55B |
| --- | --- | --- |
| Vendor | DeepSeek | NVIDIA |
| Licence | MIT | OpenMDW-1.1 |
| Last release | 2026-10-17 | 2026-06-04 |