Claude Opus 4.8 vs Claude Sonnet 5

< Large Language Models (LLM)

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

Claude Opus 4.8Claude Sonnet 5
ProviderAnthropicAnthropic
Pricing$150–700/mo$70–350/mo
Quality
9.8/10
9.4/10
Speed
7.8/10
8.5/10
Ease of use
8/10
8.2/10
Value
2/10
5/10
Context1000K1000K
TasksText Generation, Chatbots, Coding, Data Analysis, Translation, RAG / SearchText Generation, Chatbots, Coding, Data Analysis, Translation, RAG / Search
Pros
  • + Top code quality
  • + 1M context
  • + Strong judgment
  • + Near-Opus quality
  • + 1M context
  • + Better price/quality
Cons
  • Most expensive tier
  • Cloud only
  • Weaker than Opus on hardest refactors

Claude Opus 4.8

Anthropic flagship: best for deep refactoring and judgment; ~4× fewer missed code defects.

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Claude Sonnet 5

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

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