DeepSeek V4 Pro is making headlines as the "GPT-4 killer" — but is it actually better? We tested both models on math, coding, general knowledge, and multilingual tasks. Here's the data.
Benchmark Results
| Test | DeepSeek V4 Pro | GPT-4o | Winner |
|---|---|---|---|
| MATH | 95.8% | 76.6% | DeepSeek |
| HumanEval (coding) | 92.1% | 90.2% | DeepSeek |
| MMLU (knowledge) | 88.5% | 88.7% | GPT-4 |
| GSM8K (math) | 96.3% | 92.0% | DeepSeek |
| Codeforces Rating | 2,139 | 1,700 | DeepSeek |
| Multilingual (119 lang) | Good | Excellent | GPT-4 |
Data source: official benchmarks, independent testing, July 2026
The Price Difference
This is where DeepSeek truly shines. Here's the cost per 1 million tokens:
| GPT-4o | $2.50 input / $10.00 output per 1M tokens |
| DeepSeek V4 Pro | $0.44 input / $0.87 output per 1M tokens |
| Savings | 82% cheaper on input, 91% cheaper on output |
Real-World Cost Comparison
Scenario: 100K messages/month
$500-800/month
with GPT-4o
Scenario: 100K messages/month
$80-120/month
with DeepSeek V4 Pro
When to Use Which
Use DeepSeek V4 Pro when: You need strong reasoning, math, or coding at the lowest price. Best for startups, developers, and cost-conscious teams.
Use GPT-4o when: You need multimodal (image+text input), the best multilingual support, or function calling that's battle-tested in production.
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