DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning): The Ultimate Performance & Pricing Comparison

Deep dive into reasoning, benchmarks, and latency insights.

The Final Verdict in the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) Showdown

After a comprehensive analysis, Grok 4 Fast (Reasoning) emerges as the superior choice for users prioritizing raw intelligence and reasoning. However, DeepSeek V3.1 Terminus (Reasoning) remains a highly competitive option, especially for scenarios demanding faster response times and cost-efficiency. This detailed DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) comparison will break down every critical metric to help you make the best decision.

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Model Snapshot

Key decision metrics at a glance.

DeepSeek V3.1 Terminus (Reasoning)

DeepSeek

Reasoning: 9
Coding: 6
Multimodal: 5
Long Context: 7
Blended Price / 1M tokens: $0.001
P95 Latency: 1000ms
Tokens per second: 21.607tokens/sec

Grok 4 Fast (Reasoning)

xAI

Reasoning: 9
Coding: 6
Multimodal: 5
Long Context: 8
Blended Price / 1M tokens: $0.000
P95 Latency: 1000ms
Tokens per second: 186.777tokens/sec

Overall Capabilities

The capability radar provides a holistic view of the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) matchup. This chart illustrates each model's strengths and weaknesses at a glance, forming a cornerstone of our DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) analysis.

This radar chart visually maps the core capabilities (reasoning, coding, math proxy, multimodal, long context) of `DeepSeek V3.1 Terminus (Reasoning)` vs `Grok 4 Fast (Reasoning)`.

Benchmark Breakdown

For a granular look, this chart directly compares scores across standardized benchmarks. In the critical MMLU Pro test, a key part of the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) debate, DeepSeek V3.1 Terminus (Reasoning) scores 90 against Grok 4 Fast (Reasoning)'s 90. This data-driven approach is essential for any serious DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) comparison.

This grouped bar chart provides a side-by-side comparison for each benchmark metric.

Speed & Latency

Speed is a crucial factor in the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) decision for interactive applications. The metrics below highlight the trade-offs you should weigh before shipping to production.

Time to First Token

DeepSeek V3.1 Terminus (Reasoning)300ms

Grok 4 Fast (Reasoning)300ms

Tokens per Second

DeepSeek V3.1 Terminus (Reasoning)21.607

Grok 4 Fast (Reasoning)186.777

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The Economics of DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning)

Power is only one part of the equation. This DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) pricing analysis gives you a true sense of value.

Pricing Breakdown

Compare input and output pricing at a glance.

Real-World Cost Scenario

To process 1M input tokens and generate 250k output tokens, DeepSeek V3.1 Terminus (Reasoning) would cost $0.001, whereas Grok 4 Fast (Reasoning) would cost $0.000. This practical calculation is vital for any developer considering the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) choice.

Review the complete pricing and packaging strategy

Which Model Wins the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) Battle for You?

Choose DeepSeek V3.1 Terminus (Reasoning) if...

Your top priority is raw performance and capability.

Cost is a secondary concern to power in your DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) decision.

You need the most advanced reasoning capabilities available.

Choose Grok 4 Fast (Reasoning) if...

You need a highly responsive model for user-facing applications.

Your budget is a primary consideration in the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) choice.

You are developing at scale where operational costs are critical.

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Your Questions about the DeepSeek V3.1 Terminus (Reasoning) vs Grok 4 Fast (Reasoning) Comparison

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