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Claude Sonnet 5

Near-Opus quality on coding and agentic work at Sonnet cost.

currentAnthropic ↗Verified 2026-08-13

$3

per M input

Specifications

Context1Msource · as of 2026-08-13
Input ($/Mtok)$3source · as of 2026-08-13
Output ($/Mtok)$15source · as of 2026-08-13
LicenceProprietarysource · as of 2026-08-13
Max output128Ksource · as of 2026-08-13
Model IDclaude-sonnet-5source · as of 2026-08-13

Official links

Claude Sonnet 5 model pageAnthropic official site

What matters

  • Adaptive thinking on by default
  • New tokenizer — roughly 30% more tokens for the same text
  • Introductory $2/$10 through 31 Aug 2026

Best for high-volume production.

Compare with

All 5 side by side →

Claude Sonnet 5 vs Claude Fable 5 →Claude Sonnet 5 vs Claude Opus 5 →Claude Sonnet 5 vs GPT-5.6 Sol →Claude Sonnet 5 vs Gemini 3.1 Pro →Claude Sonnet 5 vs Grok 4.6 →

Also in Language Models

Claude Fable 5 · AnthropicClaude Opus 5 · AnthropicGPT-5.6 Sol · OpenAIGemini 3.1 Pro · GoogleGrok 4.6 · xAI