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Model deprecations - Claude Platform Docs
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Models overview Model IDs and versioning Choosing a model Optimizing for cost and intelligence Introducing Claude Fable 5 and Claude Mythos 5 What's new in Claude Sonnet 5 What's new in Claude Opus 5 Upgrade between model versions Model deprecations Model cards System prompts Pricing
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Models & pricing  Models
Model deprecations
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See which Claude models are active, deprecated, or retired, and find retirement dates and recommended replacements for models and API parameters.
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As safer and more capable models launch, Anthropic regularly retires older ones. Applications relying on Anthropic models may need occasional updates to keep working. Impacted customers will always be notified by email and in the documentation.
This page lists all API deprecations, along with recommended replacements.
Overview
Anthropic uses the following terms to describe the model lifecycle:
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Parameter Status Behavior Recommended replacement
temperature , top_p , top_k Deprecated (Claude Opus 4.7 and later) Returns a 400 error when set to a non-default value on Claude 4.7 and later models and Claude Mythos Preview . Omit and use prompting to guide model behavior.
For migration steps, see the migration guide .
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- Overview
- Migrating to replacements
- Notifications
- Auditing model usage
- Best practices
- Deprecation downsides and mitigations
- Model status
- Deprecation history
- 2026-06-05: Claude Opus 4.1 model
- 2026-04-14: Claude Sonnet 4 and Claude Opus 4 models
- 2026-02-19: Claude Haiku 3 model
- 2025-12-19: Claude Haiku 3.5 model
- 2025-10-28: Claude Sonnet 3.7 model
- 2025-08-13: Claude Sonnet 3.5 models
- 2025-06-30: Claude Opus 3 model
- 2025-01-21: Claude 2, Claude 2.1, and Claude Sonnet 3 models
- 2024-09-04: Claude 1 and Instant models
- API parameter deprecations