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Nemotron Ultra 253B vs DeepSeek V4.1 Flash 1017

At a glance

NVIDIA's largest Nemotron model based on Llama 3.1 at 253B scale.

131K ctx

DeepSeek's October 2026 checkpoint of the V4.1 Flash workhorse, refreshed for stronger agentic coding with shorter, faster answers.

1.0M ctx$0.15/$0.60 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
No benchmarks available

This model hasn't been benchmarked yet.

Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Specs
131K
Context
33K
Max output
—
Released
1.0M
Context
256K
Max output
Oct 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$0.15/M tokens
Output$0.60/M tokens
Cache read$0.003/M tokens
Chat with Nemotron Ultra 253BGo to model
Chat with DeepSeek V4.1 Flash 1017Go to model
Frequently Asked Questions: Nemotron Ultra 253B vs DeepSeek V4.1 Flash 1017▼

Which is better, Nemotron Ultra 253B or DeepSeek V4.1 Flash 1017?

▼

Both Nemotron Ultra 253B and DeepSeek V4.1 Flash 1017 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which has a larger context window, Nemotron Ultra 253B or DeepSeek V4.1 Flash 1017?

▼

DeepSeek V4.1 Flash 1017 has a larger context window: Nemotron Ultra 253B supports 131K tokens vs DeepSeek V4.1 Flash 1017 at 1M tokens.

Do both Nemotron Ultra 253B and DeepSeek V4.1 Flash 1017 support vision?

▼

DeepSeek V4.1 Flash 1017 supports vision/image input, but Nemotron Ultra 253B does not.

What are the key differences between Nemotron Ultra 253B and DeepSeek V4.1 Flash 1017?

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Key differences: only DeepSeek V4.1 Flash 1017 supports vision input; only DeepSeek V4.1 Flash 1017 offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Nemotron Ultra 253B and DeepSeek V4.1 Flash 1017 for free on idapt.app to see which performs better for your specific needs.

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