Claude Sonnet 5 vs GPT-5.6 Luna

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

	Claude Sonnet 5	GPT-5.6 Luna
Provider	Anthropic	OpenAI
Pricing	$70–350/mo	$20–120/mo
Quality	9.4/10	8.4/10
Speed	8.5/10	9.5/10
Ease of use	8.2/10	8.5/10
Value	5/10	8/10
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	+ High speed + Low cost + Good for high-volume tasks
Cons	− Weaker than Opus on hardest refactors	− Weaker than flagships on hard reasoning

Claude Sonnet 5

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

Fastest and cheapest GPT-5.6 tier for light tasks and high throughput.