DeepSeek V4 API Limits: Context, Pricing and Concurrency

What we verified on June 28, 2026

• DeepSeek's official Models & Pricing page currently shows a shared V4 surface with a 1M context length and 384K maximum output for both deepseek-v4-flash and deepseek-v4-pro.
• The same official page bills in units of per 1M tokens and currently lists deepseek-v4-flash at $0.0028 input cache hit, $0.14 input cache miss, and $0.28 output, while deepseek-v4-pro is listed at $0.003625, $0.435, and $0.87 respectively.
• DeepSeek's official rate-limit page currently treats concurrency as an account-level cap, not a per-key loophole: deepseek-v4-flash is listed at 2500 concurrent requests and deepseek-v4-pro at 500.
• The official rate-limit contract is explicit about failure mode: once the concurrency limit is exceeded, requests receive HTTP 429 rather than silently queueing forever.
• DeepSeek also documents a capacity-expansion path with no additional cost, but only through a business-needs request workflow. That is a request path, not a guarantee of automatic higher limits.
• The pricing page still warns that product prices may vary, so this item should be read as a current docs snapshot rather than a promise that rates never change.

Sources

• DeepSeek English homepage
• DeepSeek official Models & Pricing page
• DeepSeek official Rate Limit & Isolation page
• DeepSeek official change log
• DeepSeek official status page
• DeepSeek official GitHub organization
• DeepSeek official Hugging Face organization
• DeepSeek official X account surface