DeepSeek V4 vs GPT-5

Pick two tools from the same category to compare side-by-side.

	DeepSeek V4 DeepSeek's V4 generation of open-weight MoE models with 1M-token context and agent-focused reasoning modes.	GPT-5 OpenAI's frontier model; broad capability, strong tool use.
Category	model	model
Vendor type	open source	commercial
Pricing	free	usage
Strengths	+ MIT-licensed open weights for both Pro and Flash variants + 1M-token context window + Selectable reasoning effort modes (non-think plus two thinking modes) + Sparse MoE design keeps activated parameters low relative to total size	+ First-class integration with OpenAI Agents SDK and Codex CLI + Broad ecosystem of tooling and integrations
Tradeoffs	− Branded as a preview release on deepseek.com as of June 2026 − V4-Pro's scale makes self-hosting impractical without large GPU clusters	− Lock-in to OpenAI platform features (e.g., Responses API)
Used in stacks	0	0