Claude Sonnet 5 vs GPT-5.5

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

	Claude Sonnet 5	GPT-5.5
Provider	Anthropic	OpenAI
Pricing	$70–350/mo	$80–400/mo
Quality	9.4/10	9.1/10
Speed	8.5/10	8.4/10
Ease of use	8.2/10	8/10
Value	5/10	5/10
Context	1000K	256K
Tasks	Text Generation, Chatbots, Coding, Data Analysis, Translation, RAG / Search	Text Generation, Chatbots, Coding, Data Analysis, Translation, RAG / Search
Pros	+ Near-Opus quality + 1M context + Better price/quality	+ Stable fallback + Cheaper than 5.6 + Proven quality
Cons	− Weaker than Opus on hardest refactors	− No longer the top of the lineup

Claude Sonnet 5

Anthropic mid-tier: agentic coding close to Opus 4.8 at a lower price.

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