Good morning!

Last week, Grok 4.1 and Gemini 3 dropped as direct responses to GPT-5.1. xAI, OpenAI, and Google were all trying to one-up each other with bigger, faster, smarter models. But while all that noise was happening, Anthropic stayed completely silent about Claude.

Until this week.

They just leaked Claude Opus 4.5 as a bombshell update that supposedly crushes everything currently on the market. It looks like they were waiting for their rivals to show their hand before revealing their latest model. And man, did they come out swinging.

What You Can Expect From Claude Opus 4.5 vs. Other AI Tools

Based on leaked benchmarks and internal docs, Claude Opus 4.5 (codenamed "Claude Kayak" or "Neptune V6") is being positioned as the ultimate flagship AI model. Here's what makes it special.

1. If You Loved Gemini 3's Coding, You'll Love This Even More

Remember how Gemini 3 can one-shot apps with vibecoding? Well, Claude 4.5 is expected to be even better. In leaked tests, Opus 4.5 scored 100% on SWE-bench Verified, which is a tough coding benchmark that tests real-world programming skills. Gemini 3 and GPT-5.1 hit around 94%. Grok 4.1? Only 82%. This means Claude 4.5 can likely handle more complex apps with zero problems. We're talking cleaner code, fewer bugs, and apps that work right the first time.

2. Near-Perfect Reasoning and Problem-Solving

On GPQA Diamond (expert-level reasoning test), Opus 4.5 scored 88.5%. Gemini 3 and GPT-5.1 got around 82.5%, while Grok 4.1 lagged at 70%. It's also crushing multi-modal tasks (combining text, images, and data) with a 93% score, beating rivals by 6-18%. For business owners tackling complex problems, this is a game-changer.

3. Built for AI Agents and Automation

Leaked results show 70% accuracy on Computer Use tasks, which means an having AI control software and complete multi-step workflows. Competitors sit around 52-64%. Opus 4.5 excels in tool use and real-time data integration, making it perfect for building AI agents that actually work.

4. Enhanced Safety Features

Anthropic is doubling down on safety with a 10-day universal jailbreak challenge and red-teaming tests. This makes Opus 4.5 more secure against misuse. If you handle sensitive data, this matters.

5. Cost Efficiency Despite Power

Leaks suggest it's 43% cheaper than GPT-5.1 in some coding tasks. Pricing is expected around $15 input / $75 output per million tokens, but efficiency improvements could make it more affordable in practice.

It's quite obvious at this point that Anthropic, xAI, OpenAI, and Google are all working behind the scenes

On models that are 2 or even 3 steps ahead of what they release to the public.

And even if these models are ready for release, they intentionally wait for their competitors to make the first move and show their cards. It's like a high-stakes poker game. Everyone's holding back their best hand.

So if Claude Opus 4.5 is coming really soon, I have no doubt that Claude 5 is already being worked on and improved in the background.

This is amazing for us as users. Competition drives innovation. We get better tools, lower prices, and features we didn't even know we needed.

Release Date For Claude 4.5

Based on leaks from Epoch AI's model tracker and brief sightings on platforms like Poe, it’s rumored to be released today. But it can also be a week or two from now.

However, nothing is confirmed yet. Anthropic hasn't made an official announcement, so take this with a grain of salt. But given the timing and the buzz, it wouldn't surprise me if we see it drop very soon.

Talk soon,

Brian

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