Reasoning Models vs Chat Models: When to Choose R1, When to Choose V3
DeepSeek R1 and V3, ERNIE X1.1 and 4.5 Turbo... what's the difference between reasoning and chat models? How do you choose?
What Are Reasoning Models
Reasoning models perform multi-step internal thinking (Chain of Thought) before generating an answer, making them significantly stronger in math, code analysis, and logical reasoning tasks.
Reasoning Model Representatives
DeepSeek R1, ERNIE X1.1, Tencent Hunyuan T1, and DeepSeek V4 Pro are all reasoning models, ideal for complex problem decomposition.
Chat Model Representatives
DeepSeek V4 Flash, Qwen3.6 Plus, and Doubao Seed 1.6 are fast chat models, ideal for general conversation and content generation without deep reasoning — faster responses and lower costs.
Selection Guide
Mathematical proofs, code debugging, system architecture analysis, complex business decisions → reasoning models. Customer service, content summarization, copywriting, daily Q&A → chat models.
Cost Differences
Reasoning models produce more output tokens (due to the thinking chain), so per-call costs are higher than chat models. Choosing chat models for non-reasoning tasks significantly reduces costs.