AI Radar

Claude Opus 4

Retired · Language, Multimodal, Reasoning · Milestone

Claude Opus 4 is a language model in Anthropic's Opus line that accepts text and images, released together with Claude Sonnet 4 and offered in paid Claude plans, on the Anthropic API, Amazon Bedrock and Google Cloud Vertex AI. Anthropic describes it as a hybrid model with near-instant answers and an extended thinking mode, and released it under its ASL-3 Standard as a precaution. [1] [2]Claude Opus 4 and Claude Sonnet 4 Summary Table, Modalities [3] Primary source

Timeline of Claude Opus 4 →

Claims and evidence

  • Released Primary source[1] [4]May 22, 2025
  • Deprecated Primary source[5]2026-04-14: Claude Sonnet 4 and Claude Opus 4 models [4]April 14, 2026
  • Retired Primary source[5]2026-04-14: Claude Sonnet 4 and Claude Opus 4 models [4]June 15, 2026
  • Status Retired Primary source[5]Model status
  • Successor of Claude 3 Opus EditorialEditorial link along the Opus tier: the announcement refers to previous Opus models without naming one, and Claude 3 Opus was the most recent Opus release before it. Primary source[1]
  • Change · Reasoning Adds an extended thinking mode next to near-instant answers.Compared with Claude 3 Opus Primary source[1] [3]section 1.1.2
  • Change · Tool use Can use tools such as web search during extended thinking, alternating between reasoning and tool use; this was in beta at launch.Compared with Claude 3 Opus Primary source[1]
  • Change · Safety Released under the ASL-3 Standard as a precaution, because Anthropic said it could not clearly rule out ASL-3-level risk.Compared with Claude 3 Opus Primary source[3]
  • Change · Training data Training data includes public web data as of March 2025; Anthropic gives January 2025 as the reliable knowledge cutoff.Compared with Claude 3 Opus Primary source[3] [2]Claude Opus 4 and Claude Sonnet 4 Summary Table
  • Input text, image Primary source[2]Claude Opus 4 and Claude Sonnet 4 Summary Table, Modalities
  • Output textThe model report also mentions audio output through text-to-speech in the Claude apps. Primary source[2]Claude Opus 4 and Claude Sonnet 4 Summary Table, Modalities
  • Feature Reasoning mode Primary source[1] [3]section 1.1.2
  • Parameters Not disclosedNot disclosed by Anthropic. No claim madeNo source
  • Access consumer app, API, cloud partner Primary source[1]

Lineage

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Based on

Not derived from another model.

Variants and derived

None recorded.

Siblings

None recorded.

All ancestors

All descendants

Variants

No variants recorded in this record.

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