Claude Sonnet 5.5 vs DeepSeek V4 Pro
Claude Sonnet 5.5 from Anthropic and DeepSeek V4 Pro from DeepSeek, side by side. Every figure comes from the model registry. No markup on model usage: you pay the provider's list price.
| Attribute |   Claude Sonnet 5.5 |   DeepSeek V4 Pro |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Model id | anthropic/claude-sonnet-5-5 | deepseek/deepseek-v4-pro |
| Status | Available via Safeguard | Available via Safeguard |
| Input / 1M tokens | $2 | $1.32 |
| Output / 1M tokens | $10 | $3.96 |
| Price notes | Base price, full 1M context at standard rate. Cache hits $0.10/1M. Batch 50% off. | Peak-hour list price (cache miss). Off-peak is half: $0.66 in / $1.98 out. Cache-hit input $0.044 peak. DeepSeek says it is phasing V4 Pro out but continues to serve it. |
| Context | 1M | 1M |
| Parameters | Not published | Not published |
| Max output | 128,000 tokens | 384,000 tokens |
| Modality | Text and image | Text |
| Weights | Closed | Open |
| Zero data retention | Available | Not stated |
| Prompts go to | Anthropic (global routing by default) | DeepSeek (People's Republic of China) |
| Retention | Not used for model training without express permission, per Anthropic's API retention doc, conversation content is not retained by default except for Covered Models that require 30-day retention, flagged content and legal holds can be kept longer | Privacy policy: personal data stored in the PRC and kept as long as necessary to provide the service, may be used to train models, with a right to opt out. No API-specific retention period or ZDR offering published |
| Region | Global by default, US-only inference via inference_geo at 1.1x pricing (Claude 4.6 and later) | China (PRC) |
| Price checked | 2026-10-08 | 2026-10-08 |
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