diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73d0b4d3..f04b25fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 ## [Unreleased]
 
 ### Added
+- **AI caption generation**: Generate platform-optimized cross-post captions from article content using Claude or OpenAI (#161)
+- **AI provider config**: New "AI Caption Generation" fieldset in component options with provider, API key, model, and tone settings
+- **AI Generate button**: One-click AI generation button in the Share Content panel that fills all caption fields
 - **X/Twitter threads**: Auto-split messages exceeding 280 chars into reply chains at sentence boundaries
 - **X/Twitter cost-optimized posting**: Optional mode to post text-only tweet first ($0.015) with URL as separate reply ($0.20)
 - **X/Twitter cost warning**: Language string documenting X API pricing for text vs URL posts
diff --git a/source/packages/com_mokosuitecross/config.xml b/source/packages/com_mokosuitecross/config.xml
index b20dd5b1..2df31bfe 100644
--- a/source/packages/com_mokosuitecross/config.xml
+++ b/source/packages/com_mokosuitecross/config.xml
@@ -227,6 +227,45 @@
         />
     </fieldset>
 
+    <fieldset name="ai" label="COM_MOKOSUITECROSS_CONFIG_AI">
+        <field
+            name="ai_provider"
+            type="list"
+            label="COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER"
+            description="COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_DESC"
+            default="none">
+            <option value="none">COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_NONE</option>
+            <option value="claude">COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_CLAUDE</option>
+            <option value="openai">COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_OPENAI</option>
+        </field>
+        <field
+            name="ai_api_key"
+            type="text"
+            label="COM_MOKOSUITECROSS_CONFIG_AI_API_KEY"
+            description="COM_MOKOSUITECROSS_CONFIG_AI_API_KEY_DESC"
+            showon="ai_provider:claude,openai"
+        />
+        <field
+            name="ai_model"
+            type="text"
+            label="COM_MOKOSUITECROSS_CONFIG_AI_MODEL"
+            description="COM_MOKOSUITECROSS_CONFIG_AI_MODEL_DESC"
+            hint="claude-haiku-4-5 / gpt-4o-mini"
+            showon="ai_provider:claude,openai"
+        />
+        <field
+            name="ai_tone"
+            type="list"
+            label="COM_MOKOSUITECROSS_CONFIG_AI_TONE"
+            description="COM_MOKOSUITECROSS_CONFIG_AI_TONE_DESC"
+            default="professional"
+            showon="ai_provider:claude,openai">
+            <option value="professional">COM_MOKOSUITECROSS_CONFIG_AI_TONE_PROFESSIONAL</option>
+            <option value="friendly">COM_MOKOSUITECROSS_CONFIG_AI_TONE_FRIENDLY</option>
+            <option value="casual">COM_MOKOSUITECROSS_CONFIG_AI_TONE_CASUAL</option>
+        </field>
+    </fieldset>
+
     <fieldset name="category_rules" label="COM_MOKOSUITECROSS_CONFIG_CATEGORY_RULES">
         <field
             name="category_rules_note"
diff --git a/source/packages/com_mokosuitecross/language/en-GB/com_mokosuitecross.ini b/source/packages/com_mokosuitecross/language/en-GB/com_mokosuitecross.ini
index bab75411..09afab49 100644
--- a/source/packages/com_mokosuitecross/language/en-GB/com_mokosuitecross.ini
+++ b/source/packages/com_mokosuitecross/language/en-GB/com_mokosuitecross.ini
@@ -549,6 +549,29 @@ COM_MOKOSUITECROSS_CONFIG_LINK_SHORTENER_YOURLS_URL_DESC="Full URL to your YOURL
 COM_MOKOSUITECROSS_CONFIG_LINK_SHORTENER_YOURLS_TOKEN="YOURLS Signature Token"
 COM_MOKOSUITECROSS_CONFIG_LINK_SHORTENER_YOURLS_TOKEN_DESC="Secret signature token from your YOURLS installation."
 
+; AI Caption Generation
+COM_MOKOSUITECROSS_CONFIG_AI="AI Caption Generation"
+COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER="AI Provider"
+COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_DESC="Select an AI provider to generate cross-post captions from article content. The API key is stored in Joomla component params (encrypted at rest)."
+COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_NONE="None (disabled)"
+COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_CLAUDE="Anthropic Claude"
+COM_MOKOSUITECROSS_CONFIG_AI_PROVIDER_OPENAI="OpenAI"
+COM_MOKOSUITECROSS_CONFIG_AI_API_KEY="API Key"
+COM_MOKOSUITECROSS_CONFIG_AI_API_KEY_DESC="API key for the selected AI provider."
+COM_MOKOSUITECROSS_CONFIG_AI_MODEL="Model"
+COM_MOKOSUITECROSS_CONFIG_AI_MODEL_DESC="AI model to use. Leave blank for the default (Claude Haiku 4.5 or GPT-4o Mini)."
+COM_MOKOSUITECROSS_CONFIG_AI_TONE="Tone"
+COM_MOKOSUITECROSS_CONFIG_AI_TONE_DESC="The writing tone for generated captions."
+COM_MOKOSUITECROSS_CONFIG_AI_TONE_PROFESSIONAL="Professional"
+COM_MOKOSUITECROSS_CONFIG_AI_TONE_FRIENDLY="Friendly"
+COM_MOKOSUITECROSS_CONFIG_AI_TONE_CASUAL="Casual"
+COM_MOKOSUITECROSS_AI_GENERATE="Generate with AI"
+COM_MOKOSUITECROSS_AI_GENERATE_DESC="Generate platform-optimized captions from the article content using AI."
+COM_MOKOSUITECROSS_AI_GENERATING="Generating captions..."
+COM_MOKOSUITECROSS_AI_GENERATED="AI captions generated successfully."
+COM_MOKOSUITECROSS_AI_ERROR="AI generation failed: %s"
+COM_MOKOSUITECROSS_AI_NOT_CONFIGURED="AI is not configured. Go to Options to set up a provider and API key."
+
 ; Category Rules
 COM_MOKOSUITECROSS_CONFIG_CATEGORY_RULES="Category Rules"
 COM_MOKOSUITECROSS_CONFIG_CATEGORY_RULES_NOTE="Category Routing"
diff --git a/source/packages/com_mokosuitecross/src/Controller/AiController.php b/source/packages/com_mokosuitecross/src/Controller/AiController.php
new file mode 100644
index 00000000..0905a0ca
--- /dev/null
+++ b/source/packages/com_mokosuitecross/src/Controller/AiController.php
@@ -0,0 +1,100 @@
+<?php
+
+/**
+ * @package     MokoSuiteCross
+ * @subpackage  com_mokosuitecross
+ * @author      Moko Consulting <hello@mokoconsulting.tech>
+ * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
+ * @license     GNU General Public License version 3 or later; see LICENSE
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+namespace Joomla\Component\MokoSuiteCross\Administrator\Controller;
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\Controller\BaseController;
+use Joomla\CMS\Session\Session;
+use Joomla\Component\MokoSuiteCross\Administrator\Helper\AiGeneratorHelper;
+
+class AiController extends BaseController
+{
+    public function generate(): void
+    {
+        if (!Session::checkToken('get')) {
+            echo json_encode(['success' => false, 'error' => 'Invalid token']);
+            $this->app->close();
+
+            return;
+        }
+
+        $user = $this->app->getIdentity();
+
+        if (!$user->authorise('core.edit', 'com_mokosuitecross')) {
+            echo json_encode(['success' => false, 'error' => 'Permission denied']);
+            $this->app->close();
+
+            return;
+        }
+
+        $articleId = $this->input->getInt('article_id', 0);
+
+        if ($articleId < 1) {
+            echo json_encode(['success' => false, 'error' => 'Missing article ID']);
+            $this->app->close();
+
+            return;
+        }
+
+        $db    = Factory::getDbo();
+        $query = $db->getQuery(true)
+            ->select($db->quoteName(['id', 'title', 'introtext', 'catid']))
+            ->from($db->quoteName('#__content'))
+            ->where($db->quoteName('id') . ' = ' . $articleId);
+        $db->setQuery($query);
+        $article = $db->loadObject();
+
+        if (!$article) {
+            echo json_encode(['success' => false, 'error' => 'Article not found']);
+            $this->app->close();
+
+            return;
+        }
+
+        $category = '';
+        $catQuery = $db->getQuery(true)
+            ->select($db->quoteName('title'))
+            ->from($db->quoteName('#__categories'))
+            ->where($db->quoteName('id') . ' = ' . (int) $article->catid);
+        $db->setQuery($catQuery);
+        $category = $db->loadResult() ?: '';
+
+        $tagQuery = $db->getQuery(true)
+            ->select($db->quoteName('t.title'))
+            ->from($db->quoteName('#__tags', 't'))
+            ->join('INNER', $db->quoteName('#__contentitem_tag_map', 'm') . ' ON ' . $db->quoteName('m.tag_id') . ' = ' . $db->quoteName('t.id'))
+            ->where($db->quoteName('m.content_item_id') . ' = ' . $articleId)
+            ->where($db->quoteName('m.type_alias') . ' = ' . $db->quote('com_content.article'));
+        $db->setQuery($tagQuery);
+        $tags = $db->loadColumn() ?: [];
+
+        $introtext = strip_tags($article->introtext ?? '');
+        $introtext = mb_substr($introtext, 0, 500);
+
+        $params = \Joomla\CMS\Component\ComponentHelper::getParams('com_mokosuitecross');
+
+        $config = [
+            'ai_provider' => $params->get('ai_provider', 'none'),
+            'ai_api_key'  => $params->get('ai_api_key', ''),
+            'ai_model'    => $params->get('ai_model', ''),
+            'ai_tone'     => $params->get('ai_tone', 'professional'),
+        ];
+
+        $result = AiGeneratorHelper::generate($article->title, $introtext, $category, $tags, $config);
+
+        $this->app->setHeader('Content-Type', 'application/json; charset=utf-8');
+        echo json_encode($result);
+        $this->app->close();
+    }
+}
diff --git a/source/packages/com_mokosuitecross/src/Helper/AiGeneratorHelper.php b/source/packages/com_mokosuitecross/src/Helper/AiGeneratorHelper.php
new file mode 100644
index 00000000..c5201d51
--- /dev/null
+++ b/source/packages/com_mokosuitecross/src/Helper/AiGeneratorHelper.php
@@ -0,0 +1,196 @@
+<?php
+
+/**
+ * @package     MokoSuiteCross
+ * @subpackage  com_mokosuitecross
+ * @author      Moko Consulting <hello@mokoconsulting.tech>
+ * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
+ * @license     GNU General Public License version 3 or later; see LICENSE
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+namespace Joomla\Component\MokoSuiteCross\Administrator\Helper;
+
+defined('_JEXEC') or die;
+
+class AiGeneratorHelper
+{
+    public static function generate(string $title, string $introtext, string $category, array $tags, array $config): array
+    {
+        $provider = $config['ai_provider'] ?? 'none';
+        $apiKey   = $config['ai_api_key'] ?? '';
+        $model    = $config['ai_model'] ?? '';
+        $tone     = $config['ai_tone'] ?? 'professional';
+
+        if ($provider === 'none' || $apiKey === '') {
+            return ['success' => false, 'error' => 'AI provider not configured or API key missing.'];
+        }
+
+        $prompt = self::buildPrompt($title, $introtext, $category, $tags, $tone);
+
+        $response = match ($provider) {
+            'claude' => self::callClaude($prompt, $apiKey, $model ?: 'claude-haiku-4-5'),
+            'openai' => self::callOpenAI($prompt, $apiKey, $model ?: 'gpt-4o-mini'),
+            default  => '',
+        };
+
+        if ($response === '') {
+            return ['success' => false, 'error' => 'AI provider returned an empty response.'];
+        }
+
+        $parsed = self::parseResponse($response);
+
+        if ($parsed === null) {
+            return ['success' => false, 'error' => 'Could not parse AI response as JSON.'];
+        }
+
+        return ['success' => true, 'data' => $parsed];
+    }
+
+    private static function callClaude(string $prompt, string $apiKey, string $model): string
+    {
+        $payload = json_encode([
+            'model'      => $model,
+            'max_tokens' => 500,
+            'messages'   => [
+                ['role' => 'user', 'content' => $prompt],
+            ],
+        ]);
+
+        $ch = curl_init('https://api.anthropic.com/v1/messages');
+        curl_setopt_array($ch, [
+            CURLOPT_POST           => true,
+            CURLOPT_POSTFIELDS     => $payload,
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_TIMEOUT        => 30,
+            CURLOPT_HTTPHEADER     => [
+                'Content-Type: application/json',
+                'x-api-key: ' . $apiKey,
+                'anthropic-version: 2023-06-01',
+            ],
+        ]);
+
+        $response = curl_exec($ch);
+
+        if ($response === false) {
+            curl_close($ch);
+            return '';
+        }
+
+        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+
+        if ($httpCode < 200 || $httpCode >= 300) {
+            return '';
+        }
+
+        $data = json_decode($response, true);
+
+        return $data['content'][0]['text'] ?? '';
+    }
+
+    private static function callOpenAI(string $prompt, string $apiKey, string $model): string
+    {
+        $payload = json_encode([
+            'model'      => $model,
+            'max_tokens' => 500,
+            'messages'   => [
+                ['role' => 'user', 'content' => $prompt],
+            ],
+        ]);
+
+        $ch = curl_init('https://api.openai.com/v1/chat/completions');
+        curl_setopt_array($ch, [
+            CURLOPT_POST           => true,
+            CURLOPT_POSTFIELDS     => $payload,
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_TIMEOUT        => 30,
+            CURLOPT_HTTPHEADER     => [
+                'Content-Type: application/json',
+                'Authorization: Bearer ' . $apiKey,
+            ],
+        ]);
+
+        $response = curl_exec($ch);
+
+        if ($response === false) {
+            curl_close($ch);
+            return '';
+        }
+
+        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+
+        if ($httpCode < 200 || $httpCode >= 300) {
+            return '';
+        }
+
+        $data = json_decode($response, true);
+
+        return $data['choices'][0]['message']['content'] ?? '';
+    }
+
+    private static function buildPrompt(string $title, string $introtext, string $category, array $tags, string $tone): string
+    {
+        $tagList = !empty($tags) ? implode(', ', $tags) : 'none';
+
+        $toneGuide = match ($tone) {
+            'casual'   => 'Use a relaxed, conversational tone.',
+            'friendly' => 'Use a warm, approachable tone with enthusiasm.',
+            default    => 'Use a professional, polished tone.',
+        };
+
+        return <<<PROMPT
+Generate cross-post captions for this article. {$toneGuide}
+
+Article title: {$title}
+Content summary: {$introtext}
+Category: {$category}
+Tags: {$tagList}
+
+Return ONLY a JSON object with these keys (no markdown, no explanation):
+{
+  "social": "Facebook/LinkedIn post (max 200 chars, include a call to action)",
+  "short": "Twitter/Bluesky post (max 270 chars, punchy, include 1-2 relevant hashtags)",
+  "chat": "Telegram/Discord message (max 300 chars, conversational)",
+  "email_subject": "Email subject line (max 60 chars, compelling, no clickbait)"
+}
+
+Rules:
+- Do not include the article URL (it is added automatically)
+- Do not wrap the JSON in markdown code fences
+- Respect the character limits strictly
+- Each caption should be unique, not just a reformatted version of the others
+PROMPT;
+    }
+
+    private static function parseResponse(string $response): ?array
+    {
+        $response = trim($response);
+
+        if (preg_match('/\{[\s\S]*\}/', $response, $matches)) {
+            $response = $matches[0];
+        }
+
+        $data = json_decode($response, true);
+
+        if (!\is_array($data)) {
+            return null;
+        }
+
+        $required = ['social', 'short', 'chat', 'email_subject'];
+
+        foreach ($required as $key) {
+            if (!isset($data[$key]) || !\is_string($data[$key])) {
+                return null;
+            }
+        }
+
+        return [
+            'social'        => mb_substr($data['social'], 0, 500),
+            'short'         => mb_substr($data['short'], 0, 280),
+            'chat'          => mb_substr($data['chat'], 0, 500),
+            'email_subject' => mb_substr($data['email_subject'], 0, 120),
+        ];
+    }
+}
diff --git a/source/packages/plg_content_mokosuitecross/src/Extension/MokoSuiteCrossContent.php b/source/packages/plg_content_mokosuitecross/src/Extension/MokoSuiteCrossContent.php
index 376b4003..57d8eb15 100644
--- a/source/packages/plg_content_mokosuitecross/src/Extension/MokoSuiteCrossContent.php
+++ b/source/packages/plg_content_mokosuitecross/src/Extension/MokoSuiteCrossContent.php
@@ -212,8 +212,53 @@ XML;
 
         $form->load($xml);
 
-        // Cross-post history panel for existing articles
+        // AI Generate button for the Share Content panel
         $articleId = Factory::getApplication()->input->getInt('id', 0);
+        $aiParams  = ComponentHelper::getParams('com_mokosuitecross');
+        $aiEnabled = \in_array($aiParams->get('ai_provider', 'none'), ['claude', 'openai'], true);
+
+        if ($aiEnabled && $articleId > 0) {
+            $aiToken = Session::getFormToken();
+            $aiUrl   = Uri::base() . 'index.php?option=com_mokosuitecross&task=ai.generate&format=raw&article_id=' . $articleId . '&' . $aiToken . '=1';
+
+            $aiButtonHtml = '<div class="mb-3">'
+                . '<button type="button" id="mokosuitecross-ai-btn" class="btn btn-sm btn-outline-info" onclick="mokosuitecrossAiGenerate()">'
+                . '<span class="icon-magic" aria-hidden="true"></span> '
+                . \Joomla\CMS\Language\Text::_('COM_MOKOSUITECROSS_AI_GENERATE')
+                . '</button>'
+                . '<span id="mokosuitecross-ai-status" class="ms-2 small"></span>'
+                . '</div>'
+                . '<script>'
+                . 'function mokosuitecrossAiGenerate(){'
+                . 'var btn=document.getElementById("mokosuitecross-ai-btn");'
+                . 'var st=document.getElementById("mokosuitecross-ai-status");'
+                . 'btn.disabled=true;st.textContent="' . \Joomla\CMS\Language\Text::_('COM_MOKOSUITECROSS_AI_GENERATING', true) . '";'
+                . 'fetch("' . $aiUrl . '")'
+                . '.then(function(r){return r.json();})'
+                . '.then(function(d){'
+                . 'btn.disabled=false;'
+                . 'if(!d.success){st.textContent=d.error||"Error";return;}'
+                . 'st.textContent="' . \Joomla\CMS\Language\Text::_('COM_MOKOSUITECROSS_AI_GENERATED', true) . '";'
+                . 'var f=d.data;'
+                . 'var s=document.getElementById("jform_attribs_mokosuitecross_social_text");if(s)s.value=f.social;'
+                . 'var h=document.getElementById("jform_attribs_mokosuitecross_short_text");if(h)h.value=f.short;'
+                . 'var c=document.getElementById("jform_attribs_mokosuitecross_chat_text");if(c)c.value=f.chat;'
+                . 'var e=document.getElementById("jform_attribs_mokosuitecross_email_subject");if(e)e.value=f.email_subject;'
+                . '})'
+                . '.catch(function(){btn.disabled=false;st.textContent="Request failed";});'
+                . '}'
+                . '</script>';
+
+            $aiXml = '<?xml version="1.0"?>
+<form><fields name="attribs"><fieldset name="mokosuitecross_share">
+    <field name="mokosuitecross_ai_generate" type="note"
+        label="" description="" />
+</fieldset></fields></form>';
+            $form->load($aiXml);
+            $form->setFieldAttribute('mokosuitecross_ai_generate', 'description', $aiButtonHtml, 'attribs');
+        }
+
+        // Cross-post history panel for existing articles
 
         if ($articleId > 0) {
             $query = $db->getQuery(true)