DeepSeek R2 vs OpenAI GPT-4.5

Name: DeepSeek R2
Brand: DeepSeek
SKU: deepseek-r2

Looking for an honest DeepSeek R2 vs OpenAI GPT-4.5 comparison in 2026? We scored both ai language models on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. In our overall scoring the DeepSeek R2 comes out ahead 78/100 to 51/100 — a 27-point gap. The widest gap is in camera quality, where the DeepSeek R2 pulls noticeably ahead.

GAGNANT

DeepSeek

DeepSeek R2

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AI Matrix

DeepSeek R2 clearly outperforms the OpenAI GPT-4.5 in the ai language models category, especially in value, scoring 78 vs 51. If you want the better overall ai language models, DeepSeek R2 is the recommended choice.

Reviewed by VersusMatrix Editorial Team|Our methodology

5 Reasons Why DeepSeek R2 Is Better

1.Better performance score: 94 vs 86
2.Higher camera score: 90 vs 70
3.Higher design rating: 100 vs 81
4.Better value score: 97 vs 0
5.Higher overall score: 78 vs 51

Détail des scores

DeepSeek R2OpenAI GPT-4.5

Benchmark (MMLU)30% weight

DeepSeek R2 Gagnant

Cost Efficiency20% weight

DeepSeek R2 Gagnant

100

Arena ELO20% weight

DeepSeek R2 Gagnant

Context Window10% weight

Égalité

Speed (tok/s)10% weight

OpenAI GPT-4.5 Gagnant

Coding (HumanEval)10% weight

DeepSeek R2 Gagnant

Scores are relative within the ai language modelscategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.

DeepSeek R2

Gagnant

✓ Pros

●Higher performance score
●Better camera score
●Better design score

✗ Cons

●Lower display score

OpenAI GPT-4.5

✓ Pros

●Better display score

✗ Cons

●Higher price relative to value
●Lower camera score
●Lower performance score

💰 Token Pricing (per 1M tokens)

Lower cost = better value. Free = open-source self-hosted.

Metric	DeepSeek R2	OpenAI GPT-4.5
Input (Prompt)	✓$0.55/1M	$75.00/1M
Output (Completion)	✓$2.19/1M	$150.00/1M
Open Source	✓ Free	Proprietary

⚡ Context Window & Speed

Context Window (tokens)

DeepSeek R2128K

OpenAI GPT-4.5128K

Metric	DeepSeek R2	OpenAI GPT-4.5
Max Output	8,192 tok	✓16,384 tok
Speed	30 tok/s	✓50 tok/s
Time to First Token	1.5s	✓900ms
Languages	40+	✓50+

📊 Benchmark Scores

Higher is better. Industry-standard AI evaluation benchmarks.

DeepSeek R2

OpenAI GPT-4.5

MMLU (Knowledge)

93.0|90.0

DeepSeek R2

OpenAI GPT-4.5

HumanEval (Coding)

96.0|88.0

DeepSeek R2

OpenAI GPT-4.5

MATH (Mathematics)

95.0|78.0

DeepSeek R2

OpenAI GPT-4.5

GPQA (Expert Q&A)

88.0|72.0

DeepSeek R2

OpenAI GPT-4.5

Chatbot Arena ELO

1420.0|1370.0

DeepSeek R2

OpenAI GPT-4.5

🔧 Capabilities

Feature	DeepSeek R2	OpenAI GPT-4.5
Reasoning / Chain-of-Thought	✓	✕
Vision (Image Input)	✕	✓
Audio Input	✕	✕
Video Input	✕	✕
Image/Audio Output	✕	✕
Function Calling / Tools	✓	✓
JSON Mode	✓	✓
Real-time Web Access	✕	✕
Fine-tuning Support	✕	✕
Batch API	✕	✓
Streaming	✓	✓
Open Source	✓	✕

ℹ️ Model Details

Field	DeepSeek R2	OpenAI GPT-4.5
Provider	DeepSeek	OpenAI
Parameters	671B	—
Knowledge Cutoff	2025-06	2024-09
Best For	reasoningmathsciencecodingcost efficient	creative writingemotional intelligenceconversationnuanced tasks

Qui devrait acheter

Buy DeepSeek R2 if…

Buy the DeepSeek R2 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.

Buy OpenAI GPT-4.5 if…

The OpenAI GPT-4.5 is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.