GPT-5.4 Mini vs DeepSeek V3

Side-by-side comparison of specifications, capabilities, and pricing.

	GPT-5.4 Mini OpenAI	DeepSeek V3 DeepSeek
Released	2026-03-05	2024-12-26
Context window	400K	64k
Parameters	—	671B
Architecture	decoder only	mixture of experts
License	Proprietary	Open Source
Knowledge cutoff	2025-08	2024-04
Capabilities
Vision
Multimodal
Reasoning
Function calling
Tool use
Structured Outputs
Code execution
Availability
Providers	OpenAI API OpenRouter	DeepInfra Fireworks AI DeepSeek Platform Microsoft Foundry OpenRouter NVIDIA NIM AWS Bedrock Together AI Bitdeer AI SiliconFlow Replicate API

Benchmarks

HellaSwag—95.7HumanEval—85.5Massive Multitask Language Understanding—88.5LiveCodeBench—49.6Aider Polyglot—48.4BigCodeBench—50.0Chatbot Arena—1302.0MMLU PRO—75.9

Full GPT-5.4 Mini specs →Full DeepSeek V3 specs →