Key Takeaways
DeepSeek V3.1 Terminus wins:
- Cheaper input tokens
- Cheaper output tokens
GPT-5 Mini wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
Price Advantage
DeepSeek V3.1 Terminus
Benchmark Advantage
GPT-5 Mini
Context Window
GPT-5 Mini
Speed
GPT-5 Mini
Pricing Comparison
Price Comparison
| Metric | DeepSeek V3.1 Terminus | GPT-5 Mini | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.21 | $0.25 | DeepSeek V3.1 Terminus |
| Output (per 1M tokens) | $0.79 | $2.00 | DeepSeek V3.1 Terminus |
| Cache Read (per 1M) | $130000.00 | $25000.00 | GPT-5 Mini |
Using a 3:1 input/output ratio, DeepSeek V3.1 Terminus is 48% cheaper overall.
DeepSeek V3.1 Terminus Providers
DeepInfra $0.21 (Cheapest)
Chutes $0.23
SiliconFlow $0.27
Novita $0.27
AtlasCloud $0.30
GPT-5 Mini Providers
OpenAI $0.25 (Cheapest)
Azure $0.25 (Cheapest)
Benchmark Comparison
6
Benchmarks Compared
0
DeepSeek V3.1 Terminus Wins
5
GPT-5 Mini Wins
Benchmark Scores
| Benchmark | DeepSeek V3.1 Terminus | GPT-5 Mini | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 28.4 | 41.0 | |
Coding Index Code generation & understanding | 31.9 | 35.3 | |
Math Index Mathematical reasoning | 53.7 | 90.7 | |
MMLU Pro Academic knowledge | 83.6 | 83.7 | - |
GPQA Graduate-level science | 75.1 | 82.8 | |
LiveCodeBench Competitive programming | 52.9 | 83.8 |
GPT-5 Mini shows stronger mathematical reasoning abilities.
Cost vs Quality
X-axis:
Y-axis:
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DeepSeek V3.1 Terminus
Other models
Context & Performance
Context Window
DeepSeek V3.1 Terminus
163,840
tokens
GPT-5 Mini
400,000
tokens
Max output: 128,000 tokens
GPT-5 Mini has a 59% larger context window.
Speed Performance
| Metric | DeepSeek V3.1 Terminus | GPT-5 Mini | Winner |
|---|---|---|---|
| Tokens/second | 0.0 tok/s | 126.7 tok/s | |
| Time to First Token | 0.00s | 60.75s |
GPT-5 Mini responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | DeepSeek V3.1 Terminus | GPT-5 Mini |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | DeepSeek V3.1 Terminus | GPT-5 Mini |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Deepseek | OpenAI |
| Released | Sep 2025 | Aug 2025 |
DeepSeek V3.1 Terminus Modalities
Input
text
Output
text
GPT-5 Mini Modalities
Input
textimagefile
Output
text