Claude Sonnet 5
Anthropic's mid-tier model released August 1, 2026. Introductory price $2/$10 per 1M tokens until August 31, 2026, then reverts to standard $3/$15. The workhorse for most Anthropic API users.
Best For
Strengths
- Best value in Anthropic line (90% of Opus quality at 40% price)
- Excellent at code generation and review
- Strong multilingual (Japanese/Korean especially)
- 500K context window
- Mature API with great documentation
Weaknesses
- Intro price ends August 31, 2026
- Less powerful than Opus 4.8 for hard tasks
- Stricter refusals than GPT-5.6
Related Alternatives
GPT-5.6 standard
Same price, better math
Gemini 3.5 Pro
Larger context, Google integration
Frequently Asked Questions
How much does Claude Sonnet 5 cost?
Claude Sonnet 5 has an introductory price of $2 per 1M input tokens and $10 per 1M output tokens until August 31, 2026. After that, it returns to the standard price of $3/$15 per 1M tokens.
Should I use Claude Sonnet 5 or Opus 4.8?
Use Sonnet 5 for 90% of tasks — code, writing, translation, summarization. It offers 90% of Opus 4.8's quality at 40% of the price. Use Opus 4.8 only for the hardest reasoning tasks where you need the absolute best quality.
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