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Claude Sonnet 5

Anthropic · anthropic/claude-sonnet-5

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Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...

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Context

Max context: 1000000
Max output: 128000

Pricing

Input / 1M: 2.00
Output / 1M: 10.00
Blend / 1M: 6.00

Quality

Quality index: —
Arena unavailable: All LMArena fetches failed: text: LMArena text snapshot request failed: 429 Too Many Requests; text@2026-07-23: LMArena text-2026-07-23 snapshot request failed: 429 Too Many Requests; text@2026-07-16: LMArena text-2026-07-16 snapshot request failed: 429 Too Many Requests; text@2026-07-09: LMArena text-2026-07-09 snapshot request failed: 429 Too Many Requests; code: LMArena code snapshot request failed: 429 Too Many Requests; code@2026-07-23: LMArena code-2026-07-23 snapshot request failed: 429 Too Many Requests; code@2026-07-16: LMArena code-2026-07-16 snapshot request failed: 429 Too Many Requests; code@2026-07-09: LMArena code-2026-07-09 snapshot request failed: 429 Too Many Requests; vision: LMArena vision snapshot request failed: 429 Too Many Requests; vision@2026-07-23: LMArena vision-2026-07-23 snapshot request failed: 429 Too Many Requests; vision@2026-07-16: LMArena vision-2026-07-16 snapshot request failed: 429 Too Many Requests; vision@2026-07-09: LMArena vision-2026-07-09 snapshot request failed: 429 Too Many Requests; document: LMArena document snapshot request failed: 429 Too Many Requests; document@2026-07-23: LMArena document-2026-07-23 snapshot request failed: 429 Too Many Requests; document@2026-07-16: LMArena document-2026-07-16 snapshot request failed: 429 Too Many Requests; document@2026-07-09: LMArena document-2026-07-09 snapshot request failed: 429 Too Many Requests; search: LMArena search snapshot request failed: 429 Too Many Requests; search@2026-07-23: LMArena search-2026-07-23 snapshot request failed: 429 Too Many Requests; search@2026-07-16: LMArena search-2026-07-16 snapshot request failed: 429 Too Many Requests; search@2026-07-09: LMArena search-2026-07-09 snapshot request failed: 429 Too Many Requests

Provider

Provider: Anthropic
Moderated: yes