DeepSeek V3 vs Claude Sonnet 4.6
DeepSeek vs Anthropic — head-to-head specs and pricing.
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.
Balanced speed + capability.
Sonnet is Anthropic's balanced model for general agents and chat.
| Spec | DeepSeek V3 | Claude Sonnet 4.6 |
|---|---|---|
| Provider | DeepSeek | Anthropic |
| Input cost / 1M tokens | $0.32 | $3.60 |
| Output cost / 1M tokens | $1.32 | $18.00 |
| Context window | 128,000 tokens | 200,000 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 DeepSeek, Anthropic, and 10 more providers behind a single API. Smart Routing automatically picks the best model per request — or you choose explicitly.