Claude Platform Updates: New Models, Rate Limits, and Tooling
Anthropic has released several updates to the Claude Platform, including new models like Claude Fable 5 and Claude Opus 4.8, with enhanced capabilities such as larger context windows and improved tool support. Rate limits have been raised and consolidated across API tiers, benefiting most users. These changes affect developers using the Claude API, SDKs, and console, with some older models and features being deprecated.
- →Launch of Claude Fable 5 and Claude Opus 4.8 models
- →Deprecation of fast mode for Claude Opus 4.7
- →Retirement of Claude Sonnet 4 and Claude Opus 4 models
- →Increased and consolidated API rate limits
- →SDKs updated for code execution tool with REPL state persistence
Deprecations (2) ›
- Deprecation of fast mode for Claude Opus 4.7
Fast mode for Claude Opus 4.7 is deprecated and will be removed on July 24, 2026. Requests using this mode will return an error after removal. Users are advised to migrate to fast mode for Claude Opus 4.8.
- Retirement of Claude Sonnet 4 and Claude Opus 4 models
The Claude Sonnet 4 (claude-sonnet-4-20250514) and Claude Opus 4 (claude-opus-4-20250514) models have been retired. All requests to these models will now result in an error. Users are recommended to upgrade to newer versions like Claude Sonnet 4.6 and Claude Opus 4.8.
Features (1) ›
- Launch of Claude Fable 5 and Claude Opus 4.8 models
Anthropic has released Claude Fable 5 and Claude Opus 4.8, featuring a 1M token context window, 128k max output tokens, and adaptive thinking. Claude Opus 4.8 is generally available, while Fable 5 is for specific participants. These models use an updated tokenizer producing more tokens per text.
Enhancements (3) ›
- Increased and consolidated API rate limits
Rate limits for Claude Sonnet and Haiku now match Claude Opus, with usage tiers consolidated into Start, Build, and Scale. Most organizations will experience higher limits, with no reduction in existing limits. Users can view their tier and limits in the Claude Console.
- SDKs updated for code execution tool with REPL state persistence
The Python, TypeScript, Go, Java, Ruby, PHP, and C# SDKs now support code_execution_20260120, enabling REPL state persistence and programmatic tool calling. This version is the minimum for these features and is available on newer model versions.
- Code execution and web search tools updated
The code execution tool now supports version code_execution_20260521, disclosing a 90-second per-cell execution time limit. The web search and web fetch tools support new versions that allow dropping consumed result blocks from API responses via a response_inclusion parameter.
https://platform.claude.com/docs/en/release-notes/overview