DeepSeek V4 vs GPT-5.6 Terra

DeepSeek V4 leads in 2 of 8 categories

Arena ELO

Tie

Cheaper

DeepSeek V4

Faster

Tie

Detailed Comparison

Category	DeepSeek V4	GPT-5.6 Terra
Provider	DeepSeek	OpenAI
Context Window	128K	128K
Input Price ($/1M)	$0.435 WIN	N/A
Output Price ($/1M)	$0.87 WIN	N/A
Arena ELO	N/A	N/A
Coding	N/A	N/A
Reasoning	N/A	N/A
Speed (tokens/sec)	N/A	N/A
Open Source	Yes	No

Frequently Asked Questions

Which has a larger context window?

DeepSeek V4 supports 128K context, while GPT-5.6 Terra supports 128K.

Is DeepSeek V4 or GPT-5.6 Terra open source?

DeepSeek V4 is open source. GPT-5.6 Terra is proprietary.

Related Articles

Codex 接入 DeepSeek-V4-Pro，三步可用

OpenAI narrows GPT-5.6 rollout after U.S. request

DeepSeek’s low-cost chatbot changed AI pricing

GPT-5.6 rumors point to 2M context and coding gains

GPT-5.6 looks like a fix-and-upgrade release

GPT-5.6先追前端，再谈超越Mythos

More Comparisons

DeepSeek V4 vs Claude Opus 4.5 DeepSeek V4 vs Llama 4 Scout DeepSeek V4 vs Claude Sonnet 4.6 DeepSeek V4 vs Claude Haiku 4.5 DeepSeek V4 vs GLM-5.2 DeepSeek V4 vs Qwen 3.6 DeepSeek V4 vs Claude Fable 5 DeepSeek V4 vs Kimi K2.7 Code GPT-5.6 Terra vs Claude Opus 4.5 GPT-5.6 Terra vs Llama 4 Scout GPT-5.6 Terra vs Claude Sonnet 4.6 GPT-5.6 Terra vs Claude Haiku 4.5 GPT-5.6 Terra vs GLM-5.2 GPT-5.6 Terra vs Qwen 3.6 GPT-5.6 Terra vs Claude Fable 5 GPT-5.6 Terra vs Kimi K2.7 Code