GPT-5.4-Cyber (OpenAI) vs DeepSeek

Which one should you pick? Here's the full breakdown.

GPT-5.4-Cyber (OpenAI)

7.2/10

OpenAI's defensive-cybersecurity variant of GPT-5.4, launched 2026-04-16. Lowered refusal boundary for security-research tasks and native binary reverse-engineering. Access gated via Trusted Access for Cyber (TAC) program -- thousands of verified defenders, hundreds of teams, no public pricing

Our Pick

DeepSeek

8.0/10

Near-frontier reasoning for pennies on the dollar -- the open-source LLM that made Silicon Valley nervous

Category	GPT-5.4-Cyber (OpenAI)	DeepSeek
Ease of Use	5.0	7.5
Output Quality	8.5	8.0
Value	7.0	9.5
Features	8.0	7.0
Overall	7.2	8.0

Pricing Comparison

Feature	GPT-5.4-Cyber (OpenAI)	DeepSeek
Free Tier	No	Yes
Starting Price	Not publicly disclosed	$0

Benchmark Head-to-Head

DeepSeek V3.2 benchmarks — GPT-5.4-Cyber (OpenAI) has no published benchmarks

Benchmark	Description	Score
MMLU	Knowledge across 57 subjects	90.8%
MMLU-Pro	Harder multi-subject reasoning	85%
GPQA Diamond	Graduate-level science questions	79.9%
HumanEval	Python code generation	91.5%
SWE-bench	Real GitHub issue fixing	67.8%

Which Should You Pick?

Pick GPT-5.4-Cyber (OpenAI) if...

✓More features (8 vs 7)

Enterprise SOC teams, established security research orgs, and vetted individual defenders who can qualify for Trusted Access for Cyber. Strongest fit if your work involves binary analysis, vulnerability research, or defensive-security tooling where standard GPT-5.4 refusals actually block the work.

Visit GPT-5.4-Cyber (OpenAI)

Pick DeepSeek if...

✓Easier to use (7.5 vs 5)
✓Better value for money (9.5/10)
✓Has a free tier

Developers and teams who need strong reasoning and coding capabilities on a budget. If you're building AI features and can't justify GPT-4 API costs, DeepSeek is the obvious first stop.

Visit DeepSeek

Our Verdict

DeepSeek edges out GPT-5.4-Cyber (OpenAI) with a 8.0 vs 7.2 overall score. Both are solid picks, but DeepSeek has the advantage in value.