GPT-5.5 vs GPT-5.6 Terra

Comparing two large language models (llm) models: features, pricing, pros and cons.

	GPT-5.5	GPT-5.6 Terra
Provider	OpenAI	OpenAI
Pricing	$80–400/mo	$60–300/mo
Quality	9.1/10	9.2/10
Speed	8.4/10	8.6/10
Ease of use	8/10	8.2/10
Value	5/10	5/10
Context	256K	1000K
Tasks	Text Generation, Chatbots, Coding, Data Analysis, Translation, RAG / Search	Text Generation, Chatbots, Coding, Data Analysis, Translation, RAG / Search
Pros	+ Stable fallback + Cheaper than 5.6 + Proven quality	+ Price/quality balance + Production-ready + Cheaper than Sol
Cons	− No longer the top of the lineup	− Weaker than Sol on hard agentic tasks

GPT-5.5

Previous OpenAI flagship — stable fallback, cheaper than GPT-5.6.

Mid-tier GPT-5.6: price/quality balance, successor to GPT-5 Standard.