LLM ComparisonClaude 4.6 SonnetClaude 4 Sonnet

Claude 4.6 Sonnet vs Claude 4 Sonnet

Compare Claude 4.6 Sonnet and Claude 4 Sonnet. Build AI products powered by either model on Appaca.

Model Comparison

FeatureClaude 4.6 SonnetClaude 4 Sonnet
ProviderAnthropicAnthropic
Model Typetexttext
Context Window1,000,000 tokens1,000,000 tokens
Input Cost
$3.00/ 1M tokens
$3.00/ 1M tokens
Output Cost
$15.00/ 1M tokens
$15.00/ 1M tokens

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Strengths & Best Use Cases

Claude 4.6 Sonnet

Anthropic

1. Most capable Sonnet model yet

  • Anthropic describes Sonnet 4.6 as its most capable Sonnet model.
  • It is a full upgrade across coding, computer use, long-context reasoning, agent planning, knowledge work, and design.

2. Stronger coding and professional task performance at Sonnet pricing

  • Pricing remains at $3/M input and $15/M output, matching Sonnet 4.5.
  • Anthropic says early-access developers strongly preferred it to Sonnet 4.5, and often even to Opus 4.5 for practical work.

3. Long-context, agent-friendly reasoning

  • Supports up to a 1M token context window in beta.
  • Anthropic reports better consistency, fewer false claims of success, fewer hallucinations, and more reliable follow-through on multi-step tasks.

4. Modern API controls for adaptive work

  • Supports adaptive thinking and the effort parameter for balancing speed, cost, and depth.
  • Gains dynamic filtering for web search and web fetch, helping agent workflows keep only relevant information in context.

Claude 4 Sonnet

Anthropic
  • Hybrid reasoning: supports both fast (“near-instant”) and extended thinking modes.
  • Optimised for responsiveness, cost and high-volume production workloads.
  • Strong coding performance relative to prior Sonnet versions (improved over Sonnet 3.7).
  • Available even in free tiers (alongside paid plans).
  • Better suited for general-purpose use and agents where speed + cost-efficiency matter.

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