GPT-5 vs DeepSeek V3
OpenAI vs DeepSeek — head-to-head specs and pricing.
OpenAI's flagship general-purpose model.
GPT-5 is OpenAI's flagship LLM — strong reasoning, tool use, vision, and JSON mode. Drop-in for anything you'd use GPT-4o for.
Open-weights reasoning champion, rock-bottom pricing.
DeepSeek V3 — exceptionally low per-token pricing (10x cheaper than GPT-5). WARNING: Per DeepSeek ToS, prompts and responses may be used for model training and are processed on servers in China. Not recommended for sensitive workloads (healthcare, legal, financial) or EU data-residency requirements. Use for cost-sensitive consumer workloads where privacy is not a hard constraint.
| Spec | GPT-5 | DeepSeek V3 |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Input cost / 1M tokens | $3.00 | $0.32 |
| Output cost / 1M tokens | $12.00 | $1.32 |
| Context window | 256,000 tokens | 128,000 tokens |
| Max output tokens | 16,000 | — |
| Streaming support | ✓ | ✓ |
| Tool calling | ✓ | ✓ |
| Vision input | ✓ | — |
| JSON mode | ✓ | ✓ |
| Status | ACTIVE | ACTIVE |
Use both via OneAPIKey — one key, one bill
OneAPIKey aggregates OpenAI, DeepSeek, and 10 more providers behind a single API. Smart Routing automatically picks the best model per request — or you choose explicitly.
More comparisons: