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deepseek-v4-pro is DeepSeek’s reasoning flagship and the most cost-effective high-capability model on ByteSpike. A fraction of the cost of gpt-5-4 at comparable quality on most benchmarks, with the same dual-protocol surface that DeepSeek exposes natively. Pricing: 0.435/1Minput,0.435 / 1M input, 0.87 / 1M output, $0.004 / 1M cache read — see the rate card.

Protocols

Both protocols are first-class. The same ByteSpike key works on either; pick whichever shape your client already speaks.

Quickstart

Capabilities

The reasoning chain (“thinking output”) appears as:
  • On the OpenAI endpoint: reasoning_content field on the choice.
  • On the Anthropic endpoint: a thinking block ahead of the text block in content[].
Reasoning tokens count toward output billing.

When to use

  • Cost-sensitive reasoning — when you’d reach for gpt-5-4 but want a fraction of the cost.
  • Agents on a budgettool_use blocks pass through transparently via the Anthropic endpoint; DOSIA Agent uses this model heavily.
  • DOSIA Agent mode — must use the Anthropic Messages endpoint.
When not to use:
  • Vision-required tasks — not on HTTP API today.
  • Web search — DeepSeek does not expose a grounding tool.
  • Long context — 64K is the ceiling here; go to claude-opus-4-8 (200K) or gemini-3-5-flash (1M).

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