GPT-5 vs DeepSeek V3.1
Detailed technical comparison between GPT-5 (OpenAI) and DeepSeek V3.1 (DeepSeek). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
GPT-5
400,000 tokensTie
Equal CapabilityTie
Equal SpeedDeepSeek V3.1
$0.25 / MTokGPT-5
GPT-5 is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy...
DeepSeek V3.1
DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...
Technical Specifications
🏆 = Superior Spec| Specification | GPT-5 | DeepSeek V3.1 |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Context Window | 400,000 tokens🏆 | 163,840 tokens |
| Agent Suitability | 92/100 (est.) | Not yet benchmarked |
| Time to First Token (TTFT) | 320 ms (est.) | No public TTFT data |
| Deployment Model | managed api | self hostable |
| Production Stability | Stable GA (est.) | Stable GA (est.) |
| API Available | Yes | Yes |
| Released Date | 2025-08-07 | 2025-08-21 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5
$1.25
DeepSeek V3.1
$0.25
Output Price per Million Tokens
GPT-5
$10.00
DeepSeek V3.1
$0.95
💡 Cost Ratio: DeepSeek V3.1 is 5.0x cheaper per input token than GPT-5.
Want to test both models live?
Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
GPT-5 Quirks & Gotchas
- ▸Reliable all-rounder — use as default for most production workflows
- ▸Not recommended for advanced reasoning chains — use o3-mini instead
DeepSeek V3.1 Quirks & Gotchas
No developer gotchas reported.
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