Model Services/Anthropic/Claude Opus 4

Claude Opus 4

Retired

Claude Opus 4 model.

Retired

The first-party endpoint is retired. Partner-channel availability is tracked separately. Retirement: 2026-06-15

Replacement reference: claude-opus-4-8

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Modality:LLM

Deprecation:Apr 14, 2026

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Monthly spend on Claude Opus 4

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Latest changes

Anthropic docs page updated with new JS chunk references

Sep 3, 2026• Critical Update

The Anthropic Claude Opus 4 model documentation page was updated, changing the JavaScript chunk file references used by the Next.js framework. This is a routine frontend deployment change with no visible impact on model behavior, pricing, or API functionality.

Claude Fable 5 GA status clarified; Mythos 5 limited availability

Sep 3, 2026• Critical Update

Anthropic updated the Claude models documentation to clarify that Claude Fable 5 is generally available on all major platforms starting June 9, 2026, while Claude Mythos 5 remains in limited availability for approved customers only. This is a documentation clarification, not an incident.

Anthropic docs page shows cookie consent banner, no model changes

Sep 3, 2026• Critical Update

The diff shows only a cookie consent banner being added to the Anthropic models documentation page. No changes to model specifications, pricing, or API behavior were detected. The baseline classification as an incident appears to be a false positive, as the page content remains unchanged aside from

Claude Opus 4.8 replaced by Claude Opus 5 in model table

Sep 3, 2026• Critical Update

Anthropic updated the models overview page, replacing Claude Opus 4.8 with Claude Opus 5 as the recommended model for complex agentic coding and enterprise work. The new model has a May 2026 knowledge cutoff (vs Jan 2026 for Opus 4.8). Users should migrate to the new model ID claude-opus-5.

Claude Opus 4 model page updated with new model references

Sep 3, 2026• Critical Update

Anthropic updated the Claude models documentation page, changing references from 'Claude 4 models' to 'Current Claude models' and updating links from a generic blog post to specific prompting guides for Claude Sonnet 5 and Claude Opus 4.8. This is a minor content update with no breaking changes.