GPT-5 mini vs DeepSeek V3
Similar quality, very different contexts: GPT-5 mini for OpenAI ecosystem, DeepSeek V3 for cost-first open-weight needs.
GPT-5 mini ($0.25/M input) and DeepSeek V3 ($0.27/M input) are essentially the same price. On most benchmarks they score within 5% of each other. DeepSeek V3 is open-weight (can self-host), GPT-5 mini lives in OpenAI's managed infrastructure. The choice is ecosystem + data residency, not quality or cost.
Side-by-side pricing
| GPT-5 mini | DeepSeek V3 | |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Input price/1M | $0.25 | $0.27 |
| Output price/1M | $2.00 | $1.10 |
| Cache read/1M | $0.025 | $0.070 |
| Context window | 400K | 64K |
| Vision | ✓ | ✗ |
| Tool use | ✓ | ✓ |
| Prompt caching | ✓ | ✓ |
| Speed tier | Fast | Fast |
Prices verified 2026-08-20. See changelog for history.
Winner by task
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Frequently Asked Questions
Why choose DeepSeek V3 over GPT-5 mini?
If you want to self-host (data residency, no per-token API fees at scale), or if you need strong Chinese-language performance, or if you want the option to fine-tune on your data without OpenAI involvement.
Is DeepSeek V3 safe to use in production?
DeepSeek's managed API (platform.deepseek.com) is hosted in China. For Western enterprises with data sovereignty requirements, use a US-hosted inference provider: Fireworks AI, Together AI, or Groq all host DeepSeek V3 on US infrastructure.
Prices verified 2026-08-20. See methodology for calculation details.