Quick verdict. GPT-5.4 is the lower-risk side on the published flags: US jurisdiction, privacy 82, safety 88, and GDPR, HIPAA and SOC 2 true. DeepSeek V3 is the cheaper API at $0.27/$1.10, with cost score 98, China jurisdiction, privacy 52, and those compliance flags false. Only DeepSeek V3 is self-hostable. Choose on the data you may send.
ChatGPT versus DeepSeek, in this dataset, means GPT-5.4 against DeepSeek V3. The decision is sovereignty, risk and API cost together. It is not a claim that a cheaper token price is a hosting plan, and it is not a network-privacy product comparison. GPT-5.4 is ranked 5 with a weighted score of 85, task 92, Truth Score 82, safety 88 and privacy 82. Jurisdiction is the United States. It is not self-hostable. GDPR, HIPAA and SOC 2 are true. API rates are $2.50 and $15 per million tokens. DeepSeek V3 is ranked 16 with a weighted score of 80, task 85, Truth Score 68, safety 66 and privacy 52. Jurisdiction is China. It is self-hostable. GDPR, HIPAA and SOC 2 are false on the published record. API rates are $0.27 and $1.10 per million tokens, and the cost-efficiency score is 98 against GPT-5.4's 74. The gap in price is real. The gap in jurisdiction and compliance flags is also real. Pick the side that matches the data you are allowed to send, then check cost.
The pair in the published dataset
ChatGPT in this head-to-head is GPT-5.4, ranked 5, weighted 85. DeepSeek is DeepSeek V3, ranked 16, weighted 80. How the MoE architecture was built is already explained on DeepSeek explained. This page is the decision: what data you are allowed to send, what the risk flags say, and what the API costs.
| Lens | GPT-5.4 | DeepSeek V3 |
|---|---|---|
| Weighted score | 85 | 80 |
| Task | 92 | 85 |
| Truth Score | 82 | 68 |
| Safety | 88 | 66 |
| Privacy | 82 | 52 |
| Jurisdiction | United States | China |
| Self-hostable | false | true |
| GDPR / HIPAA / SOC 2 | true / true / true | false / false / false |
| API input / output per million | $2.50 / $15 | $0.27 / $1.10 |
| Cost efficiency | 74 | 98 |
Figures from /data/ai-comparison-2026.json. Last verified 2026-06-26. Scoring version v1.0. Affiliate links are off.
Sovereignty
GPT-5.4's jurisdiction flag is the United States and it is not self-hostable. DeepSeek V3's jurisdiction flag is China and it is self-hostable. The hosted API and a self-hosted weight file are different places for the same brand name. The risk write-up is the China risk assessment. The deployment choice is self-hosted vs API. This page does not pick a server vendor.
Risk
Safety 88 versus 66, privacy 82 versus 52, Truth Score 82 versus 68. GDPR, HIPAA and SOC 2 are true on GPT-5.4 and false on the DeepSeek V3 record. Those flags are why a lower weighted score is not the whole risk story, and why a higher task score on GPT-5.4 (92 versus 85) is not a reason to ignore jurisdiction. Read the GPT-5.4 profile if the US API is the side you are leaning toward.
API cost
DeepSeek V3's published rate is $0.27 and $1.10 per million tokens, cost efficiency 98. GPT-5.4 is $2.50 and $15, cost efficiency 74. The price gap is large enough to matter at volume. It does not erase a false GDPR flag. Check the month in the calculator and the wider price context on cheapest AI API. Official pages, not affiliate links: platform.openai.com and deepseek.com.
Two different questions. The match engine can weigh task, cost and privacy. It should not be used to talk yourself out of a jurisdiction limit.
FAQ
Which models are compared?
GPT-5.4 and DeepSeek V3, the ChatGPT and DeepSeek rows in the published dataset.
Why is DeepSeek cheaper and still not the default?
The API rate is $0.27 and $1.10 per million tokens, but jurisdiction is China and GDPR, HIPAA and SOC 2 are false on the hosted record.
Does self-hosting change the jurisdiction flag?
The dataset marks DeepSeek V3 self-hostable and GPT-5.4 not self-hostable. Running weights on infrastructure you control is a different deployment from the hosted API.