AI Provider for Anthropic

This plugin provides Anthropic integration for the PHP AI Client SDK. It enables WordPress sites to use Anthropic's Claude models for text generation and other AI capabilities. Features:

• Text generation with Claude models
• Function calling support
• Extended thinking support
• Automatic provider registration

Available models are dynamically discovered from the Anthropic API, including Claude models for text generation with multimodal input support. Requirements:

• PHP 7.4 or higher
• For WordPress 6.9, the wordpress/php-ai-client package must be installed
• For WordPress 7.0 and above, no additional changes are required
• Anthropic API key

1.0.5 - 2026-10-01 Changed

• Throw TokenLimitReachedException when the Anthropic API stops with max_tokens or model_context_window_exceeded, instead of silently returning a truncated result (#4).
• Added a WordPress Playground preview blueprint (#40).

Fixed

• Preserved extended thinking signatures across conversation turns, preventing "thinking.signature: Field required" errors on multi-turn conversations (#31).
• Continued turns that stop with pause_turn instead of returning a truncated result (#32).
• Made model sorting robust to empty regex matches and tested compatibility with PHP AI Client 1.3.1 (#34).
• Anthropic thinking-token usage is now reported via thoughtTokens, with totals preserved and paused-turn continuations accumulated correctly (#44).

1.0.4 - 2026-08-17 Changed

• Bumped WordPress tested-up-to version 7.1 #35.

Fixed

• Corrected model metadata for Claude Opus 4.7 and later, including Claude 5 models, so unsupported sampling parameters are no longer advertised during automatic model selection #25.
• Normalized empty tool-call arguments as JSON objects, preventing Anthropic API errors when replaying tool calls that accept no arguments #23.

1.0.3

• Add a provider logo to the metadata if the client version > 1.3.0 (#18).

1.0.2

• Add plugin directory assets by @shaunandrews in https://github.com/WordPress/ai-provider-for-anthropic/pull/10
• Add 'connector' tag to readme.txt by @jeffpaul in https://github.com/WordPress/ai-provider-for-anthropic/pull/12
• Add provider description by @felixarntz in https://github.com/WordPress/ai-provider-for-anthropic/pull/13

1.0.1

• Initial release of the plugin
• Support for Claude text generation models
• Function calling support
• Extended thinking support

1.0.0

• Initial release of the Composer package