Claude Sonnet 5

Claude Sonnet 5 (June 2026) is Anthropic's most agentic Sonnet yet — strong planning, browser/terminal tool use and long autonomous runs at a mid-tier price. It's now the default model on the free and Pro plans.

Best for

• Agentic coding and long, multi-step autonomous tasks
• Planning + browser/terminal tool use
• The new everyday default across Claude apps and Claude Code
• Near-Opus quality at roughly half the price

How it compares — and the India angle

• Closes most of the gap to Opus 4.8 at ~half the cost — the smart new default for most Claude users, including Indian devs.
• Intro API pricing ($2/$10 per 1M) undercuts the older Sonnet 4.6 — great value while the offer lasts.
• Uses an updated tokenizer, so the same text can map to slightly more tokens — factor that into cost estimates.