GPT-5.3 Codex vs DeepSeek V4 Pro
OpenAI's coding-focused model vs DeepSeek's budget powerhouse. DeepSeek V4 Pro is 83-91% cheaper with 3.7x more context. GPT-5.3 Codex is optimized for code generation.
Pricing data verified: Jun 20, 2026
| Specification | GPT-5.3 Codex (OpenAI) | DeepSeek V4 Pro (DeepSeek) |
|---|---|---|
| Input Price (per 1M tokens) | $2.50 | $0.435 |
| Output Price (per 1M tokens) | $10.00 | $0.87 |
| Context Window | 272K tokens | 1M tokens |
| Tier | Mid | Budget |
| Provider | OpenAI | DeepSeek |
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Frequently Asked Questions
How much cheaper is DeepSeek V4 Pro than GPT-5.3 Codex?
GPT-5.3 Codex costs $2.50/$10.00 per 1M tokens. DeepSeek V4 Pro costs $0.435/$0.87 per 1M tokens.
Is GPT-5.3 Codex worth 5x the price over DeepSeek V4 Pro?
GPT-5.3 Codex is specifically optimized for code generation tasks with superior code quality on complex multi-file refactoring. DeepSeek V4 Pro handles most coding tasks well at 83-91% lower cost. For high-volume code generation, DeepSeek is the better value; for critical code where quality matters most, Codex may justify the premium.
Can DeepSeek V4 Pro replace GPT-5.3 Codex for coding?
For most coding tasks (boilerplate, tests, simple features, documentation), DeepSeek V4 Pro delivers excellent results at $0.435/$0.87 vs Codex's $2.50/$10. For complex architecture decisions, multi-file refactoring, and critical production code, GPT-5.3 Codex's specialized training may produce better results.