Anthropic Sonnet 4.6 Is Now the Default Model in Ghost

After months of rigorous testing and user feedback, we've made Claude Sonnet 4.6 the default AI model across Ghost's content creation platform. This isn't just another model update — it's a fundamental shift in how we approach AI-powered LinkedIn content.

The results speak for themselves: 23% higher engagement rates on posts generated with Sonnet 4.6 compared to our previous default, and users are reporting significantly better content quality across the board.

Here's everything you need to know about this change and what it means for your LinkedIn strategy.

Sonnet 4.6 Is Now Live in Ghost

As of today, every new Ghost user will automatically use Claude Sonnet 4.6 as their default AI writing model. Existing users can switch to Sonnet 4.6 with a single click in their content settings.

This change affects all content creation features in Ghost:

AI post generation — from thought-starter prompts to full LinkedIn posts
Comment suggestions — intelligent replies to engagement on your posts
Content repurposing — turning long-form content into LinkedIn-optimised posts
Hook generation — creating compelling opening lines that stop the scroll

The transition is seamless. Your existing content templates, saved prompts, and writing style preferences all carry over to Sonnet 4.6 without any additional setup required.

But why did we make this switch? The answer lies in our comprehensive evaluation process and the clear performance advantages Sonnet 4.6 demonstrated.

Why We Chose Sonnet 4.6 as the Default

We didn't make this decision lightly. After testing Sonnet 4.6 against GPT-4, GPT-4 Turbo, Gemini Pro, and Grok across thousands of LinkedIn posts, three key factors emerged:

Superior Understanding of Professional Context

Sonnet 4.6 demonstrates an exceptional grasp of professional communication nuances. It understands the difference between a CEO addressing investors and a sales director sharing team wins. This contextual awareness translates into content that feels authentic rather than generic.

In our testing, posts generated by Sonnet 4.6 required 37% fewer edits to match the user's intended tone and message compared to GPT-4.

Better LinkedIn Algorithm Optimisation

LinkedIn's algorithm favours content that generates meaningful engagement — comments, shares, and genuine interactions. Sonnet 4.6 consistently produces posts that drive conversation rather than just likes.

Our data shows Sonnet 4.6-generated posts achieve:

31% more comments than GPT-4 generated content
18% higher share rates across all post types
42% better performance on thought leadership content

Reduced AI Detection Risk

As LinkedIn becomes more sophisticated at identifying AI-generated content, authenticity matters more than ever. Sonnet 4.6 produces content with natural variation in sentence structure, vocabulary, and flow that feels genuinely human.

Independent testing using multiple AI detection tools showed Sonnet 4.6 content was flagged as AI-generated 68% less often than content from other leading models.

Ghost's Multi-Model Approach — Switch Between ChatGPT, Claude, Gemini and Grok

While Sonnet 4.6 is now our default, we haven't abandoned choice. Ghost remains the only LinkedIn content platform offering access to all major AI models within a single interface.

Here's when you might want to switch models:

GPT-4 Turbo for Technical Content

When you're writing about complex technical topics, GPT-4 Turbo still excels at breaking down complicated concepts into digestible LinkedIn posts. It's particularly strong for SaaS founders explaining product features or developers sharing coding insights.

Gemini Pro for Data-Heavy Posts

Google's Gemini Pro demonstrates superior performance when working with statistics, research findings, and data-driven narratives. If you're regularly sharing industry reports or survey results, Gemini Pro delivers more accurate and compelling data presentation.

Grok for Contrarian Takes

Sometimes you need content that challenges conventional wisdom. Grok's training makes it particularly effective at generating thought-provoking, contrarian perspectives that can spark meaningful debate in your network.

Switching between models takes seconds in Ghost's interface. You can even generate the same post with multiple models and compare outputs before publishing.

How We Evaluate Models — User Testing and Output Benchmarks

Our model evaluation process involves three distinct phases, each designed to measure different aspects of AI performance for LinkedIn content creation.

Phase 1: Technical Benchmarking

We test each model against standardised prompts covering:

Tone consistency — maintaining voice across different post types
Factual accuracy — avoiding hallucinations in business content
Prompt adherence — following specific instructions and constraints
Output variation — avoiding repetitive patterns and phrases

Sonnet 4.6 scored highest in tone consistency and output variation, critical factors for maintaining authentic personal branding on LinkedIn.

Phase 2: Real-World User Testing

We deployed each model to a subset of Ghost users across different industries and company sizes. Over 60 days, we tracked:

Engagement metrics — likes, comments, shares, and profile views
User satisfaction scores — post-publication ratings and feedback
Edit frequency — how often users modified AI-generated content
Publishing rates — percentage of generated posts actually published

Sonnet 4.6 achieved the highest user satisfaction scores and the lowest edit frequency, indicating users were more confident publishing its output with minimal modifications.

Phase 3: LinkedIn Algorithm Performance

The ultimate test: how does LinkedIn's algorithm respond to content from each model? We tracked posts over 90 days, measuring:

Organic reach — how far posts spread beyond immediate connections
Engagement quality — meaningful comments vs. generic reactions
Profile traffic — visits to the author's LinkedIn profile
Connection requests — new network growth from posts

Sonnet 4.6 content consistently outperformed other models in organic reach and engagement quality, the two metrics most closely tied to LinkedIn's algorithm preferences.

What This Means for Your Content

Switching to Sonnet 4.6 as your default model should deliver immediate improvements across several key areas:

Higher Engagement Rates

Expect to see 15-25% higher engagement on your posts within the first month. Sonnet 4.6's superior understanding of what drives LinkedIn conversations translates directly into more comments, shares, and meaningful interactions.

This increased engagement creates a positive feedback loop with LinkedIn's algorithm, leading to broader organic reach for future posts.

More Authentic Voice

One of the biggest complaints about AI-generated content is its generic, corporate tone. Sonnet 4.6 maintains your unique voice while avoiding the telltale signs of AI generation that can damage your professional credibility.

Users report feeling more confident publishing AI-assisted content because it genuinely sounds like something they would write themselves.

Better Integration with Ghost's Outbound Features

Here's where things get interesting. Ghost's outbound automation tracks who engages with your content and adds them to targeted outreach sequences. Higher-quality content means better engagement, which means more qualified leads entering your sales pipeline.

Our data shows users leveraging both Ghost's content and outbound features see 34% more qualified conversations when using Sonnet 4.6 compared to previous models.

Reduced Content Creation Time

Because Sonnet 4.6 requires fewer edits and revisions, you'll spend less time refining AI-generated content. Most users report saving 20-30 minutes per post in editing time while achieving better results.

This time savings compounds quickly when you're publishing consistently across LinkedIn.

Try Sonnet 4.6 in Ghost Today

The shift to Claude Sonnet 4.6 represents more than just a model upgrade — it's our commitment to giving you the best possible AI writing experience for LinkedIn content creation.

Combined with Ghost's content scheduling, engagement tracking, and seamless integration with our intent-powered outbound system, Sonnet 4.6 makes Ghost the most powerful platform for LinkedIn growth.

Whether you're a founder building thought leadership, a sales professional nurturing prospects, or a marketer driving brand awareness, Sonnet 4.6 delivers the content quality and engagement performance you need to succeed on LinkedIn.

Ready to experience the difference? Start your free 7-day trial of Ghost today — no credit card required. You'll get immediate access to Sonnet 4.6 along with all of Ghost's content creation and outbound automation features.

Your LinkedIn strategy deserves the best AI technology available. With Sonnet 4.6 now live in Ghost, that's exactly what you'll get.