DeepSeek V3.2 is the extended reasoning variant of DeepSeek-V3.2. Available on AI Gateway since December 1, 2025, it generates up to 163K tokens of chain-of-thought reasoning for complex analytical, scientific, and multi-step problem-solving tasks.
import { streamText } from 'ai'
const result = streamText({ model: 'deepseek/deepseek-v3.2-thinking', prompt: 'Why is the sky blue?'})DeepSeek V3.2 became available on AI Gateway on December 1, 2025 as the reasoning-optimized variant of the V3.2 release. It operates exclusively in thinking mode, generating extended chain-of-thought reasoning traces before producing a final answer. The output token budget extends to 163K tokens, compared to 8K for the standard V3.2 chat variant. That headroom accommodates complex multi-step reasoning chains.
The trade-off is explicit: DeepSeek V3.2 does not support tool use. This makes it a pure reasoning engine rather than a tool-augmented agent. Where the standard DeepSeek-V3.2 supports tool calls across both reasoning and non-reasoning modes, the Thinking variant trades tool integration for a deeper reasoning budget. Use it when the reasoning process itself is the primary value, such as complex scientific analysis, multi-step mathematical derivation, or structured argument construction.
The Thinking variant and standard V3.2 are accessible through AI Gateway under the deepseek provider without separate account setup.