AI SDK
DocsProvidersGuides
DocumentationProvidersGuidesChangelog

DeepSeek

Chat and reasoner models with reasoning_content streaming.

let model = DeepSeekModel("deepseek-chat")

Key from DEEPSEEK_API_KEY; base URL https://api.deepseek.com.

Features

  • Rides the shared chat-completions wire: tools, structured output, and vision are encoded for any model that honors them.
  • Reasoner models stream reasoning_content deltas, surfaced as .reasoningDelta — no tag parsing needed.
  • The reasoning parameter maps to thinking.type plus reasoning_effort, where .xhigh becomes max.
  • Prompt-cache hits (prompt_cache_hit_tokens) surface as usage.cachedInputTokens.

Models

DeepSeek's API serves two aliases — deepseek-chat and deepseek-reasoner — that always point at the current generation. The versions behind them, as of July 2026:

VersionReleased
deepseek-v4-pro, deepseek-v4-flashApril 2026
deepseek-v3.2, deepseek-v3.2-thinkingDecember 2025
deepseek-v3.1, deepseek-v3.1-terminus2025
deepseek-r1, deepseek-v3The originals

Groq

Fast open models on the chat-completions wire, with reasoning deltas.

Mistral

Mistral and Magistral models on the chat-completions wire.

On this page

FeaturesModels