Product at @AnthropicAI 🧠 previously @MicrosoftAI; @InflectionAI; @WhatsApp; @Meta; startup founder 💬
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Joined February 2010
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First launch at Anthropic! Super proud of the team for bringing Opus 4.8 to everyone. Let us know what you think!
Introducing Claude Opus 4.8: it builds on Opus 4.7 with sharper judgment, more honesty about its own progress, and the ability to work independently for longer than its predecessors.
Available today at the same price.
ALT Benchmark table showing how Claude Opus 4.8 compares to its predecessor and to other models on tests of coding, agentic skills, reasoning, and practical knowledge work tasks.
Davide Bonapersona retweeted
1/ Claude Duet is out today in research preview!
Over the past few weeks, it's become the main way I get work done.
Lots of personal agents these days, but this one is built for work, has very high judgement, and indexes heavily on safety / security.
claude.com/product/claude-du…
Davide Bonapersona retweeted
Claude Opus 5.5 has been out for a few days. Some of our favorite things people have explored and discovered with it so far:
xitter.gq/RyanSael/status/210259…
I asked Opus 5.5 to explain camera focus by building an interactive lens lab
Here's what it came up with after 1 hour 26 minutes in one shot, $25.66 API cost
lens.lab.sael.net
Move the focus ring and you can see the glass elements shift the sharp plane through the scene
Davide Bonapersona retweeted
Today we’re opening applications for the Life Sciences Verification Program.
Through the LSVP, life science professionals can use our models—including, for the first time, Mythos—with a new set of safeguards designed to enable the full range of biology-related work. We designed these new safeguards to provide a better experience for biologists and more protection from risk of misuse.
The program is launching in beta for teams of all kinds—from academic labs to startups, pharma companies, and more. We will continue to improve the program and expand access to individual Pro and Max plans over time.
Learn more about these access grants and apply: anthropic.com/news/life-scie…
Davide Bonapersona retweeted
Join Anthropic and help Claude learn real-world knowledge work! You'll own the strategy for domains (e.g., finance, legal, automation): source high-value tasks, design RL env / reward signal, and evaluate the capability improvement.
Look for Staff+ research engineers who love applied research AND getting hands-dirty with datasets. RL / reward design experience required. Founder experience is big plus.
Our team closely partners with product to ship Claude in Office, Cowork, and Claude Design.
job-boards.greenhouse.io/ant…
Davide Bonapersona retweeted
Claude Fable 5 will be available again globally tomorrow.
After a series of productive conversations with the US government, we're redeploying the model with a new set of classifiers to target and block more cybersecurity tasks. In the near term, some routine tasks like coding and debugging will fall back to Opus 4.8. We’ll continue to refine these classifiers over the coming weeks to reduce false positives and better distinguish genuine misuse from legitimate requests.
We’ve also begun drafting a consensus framework—with Amazon, Microsoft, Google, and other Glasswing partners—for assessing the severity of AI jailbreaks and how AI developers should respond to them. We invite other industry partners and model providers to join us in this effort.
Finally, we’re scaling up our collaboration with the US government on model testing and safeguards. This will include pre-release access to models and safeguards for evaluation, information sharing on jailbreaks and misuse, and dedicated resources for joint research.
Thank you to our users for your patience, and to our partners across the government, industry, and the research community who worked alongside us to make Fable 5 available again.
Read our full blog: anthropic.com/news/redeployi…
Davide Bonapersona retweeted
Fable 5 is state-of-the-art on nearly all tested benchmarks, with exceptional performance in software engineering, knowledge work, scientific research, and vision.
The longer and more complex the task, the larger Fable 5’s lead over our other models.
ALT Benchmark table titled Mythos 5 & Fable 5, comparing Claude Mythos 5 and Fable 5 against Claude Mythos Preview, Claude Opus 4.8, GPT 5.5, and Gemini 3.1 Pro.
Davide Bonapersona retweeted
Anthropic has confidentially submitted a draft S-1 registration statement to the Securities and Exchange Commission.
Pending completion of SEC review, this gives us the option to pursue an initial public offering.
Read more: anthropic.com/news/confident…
Davide Bonapersona retweeted
Claude Opus 4.8 takes the lead on the Artificial Analysis Intelligence Index at 61.4, with Anthropic retaking the #1 spot on GDPval-AA and advancing in terminal use and scientific reasoning
To reach the leading position on the Intelligence Index, @Anthropic made large improvements in both real-world agentic work and frontier academic reasoning tasks.
Key takeaways:
➤ Claude Opus 4.8 is the new leader on the Artificial Analysis Intelligence Index. Opus 4.8 scores 61.4, up +4.1 points from Opus 4.7 and +1.2 points ahead of GPT-5.5 (xhigh), the previous Index leader
➤ The new release is slightly more efficient than its predecessor on agentic tasks, but token efficiency varied by task type. We saw Opus 4.8 use fewer turns and output tokens on GDPval-AA, but approximately the same number of output tokens for the overall Intelligence Index to achieve significantly higher performance.
➤ Anthropic retakes the lead on GDPval-AA, our primary evaluation for agentic performance on knowledge work tasks. Opus 4.8 scored an 1,890 Elo, reflecting an implied win rate of approximately 67% against GPT-5.5
➤ Claude is now among the top models for scientific reasoning. Previous releases have trailed peers on complex academic reasoning tasks, but with Opus 4.8, Claude sits slightly ahead of OpenAI and Google as the leader on Humanity’s Last Exam. It also scores higher than Gemini 3.1 Pro on CritPt, a frontier physics benchmark, but remains behind GPT-5.4 and GPT-5.5
➤ Claude Opus 4.8 reaches #2 on AA-Omniscience, slightly ahead of Opus 4.7. Opus 4.8 scores 27.4 on the AA-Omniscience Index behind only Gemini 3.1 Pro (32.9). Accuracy ticked up slightly to 46.6% and hallucination rate held roughly flat at 35.9% - Anthropic continues to demonstrate substantially lower hallucination rates than peer models from Google and OpenAI
➤ Compared with Opus 4.7, Opus 4.8 also makes material gains on Terminal-Bench Hard (+6.8 points), τ²-Bench Telecom (+5.9 points), and IFBench (+3.6 points), with relatively flat scores across AA-LCR, GPQA, and SciCode.
Other key model details remain the same as Opus 4.7:
Context window of 1 million tokens (equivalent to Opus 4.7)
Pricing of $5/$25 per million tokens of input/output; cache pricing remains at a 25% premium for cache writes ($6.25 per million tokens) with 5-minute time to live, and 90% discount for cache hits ($0.5 per million tokens)
Effort remains the recommended way of configuring model performance and latency, with the same options as Opus 4.7 - we measured the model at its ‘max’ effort setting to test peak performance
Davide Bonapersona retweeted
How do people seek guidance from Claude?
We looked at 1M conversations to understand what questions people ask, how Claude responds, and where it slips into sycophancy. We used what we found to improve how we trained Opus 4.7 and Mythos Preview.
anthropic.com/research/claud…
Davide Bonapersona retweeted
I love how easy it’s becoming to learn on the go with podcasts in Copilot.
I turned GitHub’s latest Octoverse report into a 5-minute pod — short, smart, and snappy. Packed with info on the seismic shifts happening in how people build software. Check it out!
Davide Bonapersona retweeted
Been playing around with the new Mico voice assistant inside Microsoft Copilot and I found a little easter egg. I love that the people building this stuff are still finding ways to add a bit of fun and nostalgia into what they're building. Kudos to Microsoft on this one!
Davide Bonapersona retweeted
Meet our third @MicrosoftAI model: MAI-Image-1
#9 on LMArena, striking an impressive balance of generation speed and quality
Excited to keep refining + climbing the leaderboard from here!
We're just getting started.
microsoft.ai/news/introducin…
ALT LMArena Text-to-Image leaderboard screenshot showing MAI_Image-1 at spot #9
ALT Roadrunner in the desert
Davide Bonapersona retweeted
GPUsss go brrrrr!
Another first for our AI fleet... a supercomputing cluster of NVIDIA GB300s with 4600+ GPUs and featuring next gen InfiniBand.
First of many as we scale to hundreds of thousands of GB300s across our DCs, and rethink every layer of the stack across silicon, systems, and software to support next gen AI workloads.
Davide Bonapersona retweeted
Learning just leveled up: eligible college/uni students can claim extra access to Copilot Podcasts, Deep Research, and Vision w/a Microsoft 365 Personal subscription, free for 12 months.
1 year, 1 subscription, countless lightbulb moments
Claim by 10/31: microsoft.com/copilot/studen…
ALT A black male college student with headphones on smiling as he works on his laptop. Text around him says "Free for students for 1 year, Now through 10/31"
Davide Bonapersona retweeted
Proud to launch our first model on LM Arena.
Zero arena-specific tuning. Tiny team. Tons of headroom.
The climb starts now.
🚨Text Leaderboard Update:
A new model provider, @MicrosoftAI has broken into the Top 15 this week!
💠MAI-1-preview by @MicrosoftAI debuts at #13.
Congrats to the Microsoft AI team! As the Text Arena is one of the most competitive races, breaking into the Top 15 is no small feat. 💪
Davide Bonapersona retweeted
Good news @Copilot users! With Deep Research, you get 5 free research reports a month for complex, thorough analysis + deep dives. For the extra curious, you can get even more with Copilot Pro.
Free access available in all Copilot countries + languages, on mobile, web + Edge.
Davide Bonapersona retweeted
Today is a big step towards an AI browser: Copilot Mode in Edge, built for how your brain actually works. Voice control, no digital clutter, and multi-tab context, all grounded in privacy and security. Try it at aka.ms/copilot-mode + feel the difference of 🧵
Davide Bonapersona retweeted
Super excited to share our new Microsoft AI site! What we're building, who we are, our philosophy, and open roles, all in one spot. We're always looking for great new teammates, so take a scroll (and do play around with the hover on the homepage) microsoft.ai
