DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning): The Ultimate Performance & Pricing Comparison

Deep dive into reasoning, benchmarks, and latency insights.

The Final Verdict in the DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) Showdown

After a comprehensive analysis, Gemini 2.5 Flash Preview (Sep '25) (Reasoning) emerges as the superior choice for users prioritizing raw intelligence and reasoning. However, DeepSeek R1 0528 (May '25) remains a highly competitive option, especially for scenarios demanding faster response times and cost-efficiency. This detailed DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (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 R1 0528 (May '25)

DeepSeek

Reasoning: 8
Coding: 2
Multimodal: 2
Long Context: 3
Blended Price / 1M tokens: $0.002
P95 Latency: 1000ms
Tokens per second: —

Gemini 2.5 Flash Preview (Sep '25) (Reasoning)

Google

Reasoning: 8
Coding: 2
Multimodal: 3
Long Context: 4
Blended Price / 1M tokens: $0.001
P95 Latency: 1000ms
Tokens per second: 291.224tokens/sec

Overall Capabilities

The capability radar provides a holistic view of the DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) matchup. This chart illustrates each model's strengths and weaknesses at a glance, forming a cornerstone of our DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) analysis.

This radar chart visually maps the core capabilities (reasoning, coding, math proxy, multimodal, long context) of `DeepSeek R1 0528 (May '25)` vs `Gemini 2.5 Flash Preview (Sep '25) (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 R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) debate, DeepSeek R1 0528 (May '25) scores 80 against Gemini 2.5 Flash Preview (Sep '25) (Reasoning)'s 80. This data-driven approach is essential for any serious DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (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 R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) decision for interactive applications. The metrics below highlight the trade-offs you should weigh before shipping to production.

Time to First Token

DeepSeek R1 0528 (May '25)300ms

Gemini 2.5 Flash Preview (Sep '25) (Reasoning)300ms

Tokens per Second

DeepSeek R1 0528 (May '25)25

Gemini 2.5 Flash Preview (Sep '25) (Reasoning)291.224

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The Economics of DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning)

Power is only one part of the equation. This DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (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 R1 0528 (May '25) would cost $0.002, whereas Gemini 2.5 Flash Preview (Sep '25) (Reasoning) would cost $0.001. This practical calculation is vital for any developer considering the DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) choice.

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Which Model Wins the DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) Battle for You?

Choose DeepSeek R1 0528 (May '25) if...

Your top priority is raw performance and capability.

Cost is a secondary concern to power in your DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) decision.

You need the most advanced reasoning capabilities available.

Choose Gemini 2.5 Flash Preview (Sep '25) (Reasoning) if...

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

Your budget is a primary consideration in the DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) choice.

You are developing at scale where operational costs are critical.

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Your Questions about the DeepSeek R1 0528 (May '25) vs Gemini 2.5 Flash Preview (Sep '25) (Reasoning) Comparison

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Data source: https://artificialanalysis.ai/