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