AI Radar

Claude Sonnet 5

Available · Language, Multimodal, Reasoning · Milestone

Claude Sonnet 5 is a language model that Anthropic calls the next generation of its Sonnet family, released on 30 June 2026 on all Claude plans, the Claude API and major cloud platforms, and made the default for Free and Pro users. It takes text and image input with a 1M token context window, has adaptive thinking on by default and launched with cyber safeguards enabled. [1] [2]June 30, 2026 [3] Primary source

Timeline of Claude Sonnet 5 →

Claims and evidence

  • Released Primary source[1] [3]Availability: Released
  • Status Available Primary source[3]Availability [4]Model status table
  • Change · Reasoning Adaptive thinking is on by default; manual extended thinking budgets, deprecated on Sonnet 4.6, now return an error.Compared with Claude Sonnet 4.6 Primary source[2]June 30, 2026
  • Change · Other Uses a new tokenizer; the release notes estimate about 30% more tokens for the same text, depending on the content.Compared with Claude Sonnet 4.6 Primary source[2]June 30, 2026
  • Change · Other Priced at 2 USD input and 10 USD output per million tokens, against 3 and 15 USD for Sonnet 4.6; the introductory price became standard on 10 August 2026.Compared with Claude Sonnet 4.6 Primary source[2]June 30, 2026; August 10, 2026 [5]
  • Change · Safety Launched with cyber safeguards on by default, the same as on Claude Opus 4.7 and Opus 4.8.Compared with Claude Sonnet 4.6 Primary source[1]
  • Input text, image Primary source[3]Capabilities: Input and output
  • Output text Primary source[3]Capabilities: Input and output
  • Context window 1M tokens Primary source[3]Capabilities: Context window
  • Parameters Not disclosedNot disclosed by Anthropic. No claim madeNo source
  • Access API, consumer app, cloud partner Primary source[1]opening section [3]Availability: Platforms

Lineage

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Not derived from another model.

Variants and derived

None recorded.

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None recorded.

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Variants

No variants recorded in this record.

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