DeepSeek V4 Pro vs GPT-5.6 Terra
DeepSeek V4 Pro and GPT-5.6 Terra are both current production-tier models. DeepSeek V4 Pro is meaningfully cheaper at $0.43 / $0.87 per 1M. GPT-5.6 Terra leads on general knowledge, instruction following, multilingual.
Specs side by side
| Metric | DeepSeek DeepSeek V4 Pro | OpenAI GPT-5.6 Terra |
|---|---|---|
| Input price (per 1M) | $0.435 | $2.5 |
| Output price (per 1M) | $0.87 | $15 |
| Context window | 1M tokens | 1.1M tokens |
| Speed tier | balanced | balanced |
| Open weights | Yes | No |
| EU region | No | Yes |
| Free tier | No | No |
| Prompt caching | Yes | Yes |
| Vision input | No | Yes |
| Extended thinking | Yes | Yes |
When to choose each
Choose DeepSeek V4 Pro if…
- Cost is a priority ($0.43 / $0.87 per 1M vs $2.5 / $15 per 1M)
- You need open weights for self-hosting or fine-tuning
Choose GPT-5.6 Terra if…
- EU data residency is required
- HIPAA eligibility is required
- You need image input / vision
- General knowledge is central to your workload
- Instruction following is central to your workload
Benchmark delta
DeepSeek V4 Pro leads on
DeepSeek V4 Pro has no meaningful benchmark lead in this pair.
GPT-5.6 Terra leads on
- General knowledge
- Instruction following
- Multilingual
- Tool use
FAQ — DeepSeek V4 Pro vs GPT-5.6 Terra
DeepSeek V4 Pro vs GPT-5.6 Terra — which is better?
DeepSeek V4 Pro and GPT-5.6 Terra are both current production-tier models. DeepSeek V4 Pro is meaningfully cheaper at $0.43 / $0.87 per 1M. GPT-5.6 Terra leads on general knowledge, instruction following, multilingual. The right pick depends on your use case — see "When to choose each" above for a data-driven decision.
How does DeepSeek V4 Pro pricing compare to GPT-5.6 Terra?
DeepSeek V4 Pro costs $0.43 / $0.87 per 1M vs GPT-5.6 Terra at $2.5 / $15 per 1M. DeepSeek V4 Pro is cheaper on output tokens by roughly 1624%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does DeepSeek V4 Pro or GPT-5.6 Terra have the bigger context window?
GPT-5.6 Terra has a 1.1M-token context window — 1× the 1M context of DeepSeek V4 Pro. Enough for entire codebases, books, or multi-document RAG.
Is there a free tier for DeepSeek V4 Pro or GPT-5.6 Terra?
DeepSeek V4 Pro: no — No free tier on the official API — but at $0.435/$0.87 per 1M it is near-free vs frontier peers. GPT-5.6 Terra: no — Free $5 credit for new accounts; paid thereafter.
Which is better for coding — DeepSeek V4 Pro or GPT-5.6 Terra?
GPT-5.6 Terra leads on coding benchmarks (DeepSeek V4 Pro: 91/100, GPT-5.6 Terra: 93/100). For production coding agents also weigh tool-use performance — DeepSeek V4 Pro scores 86, GPT-5.6 Terra scores 93.