X：Kim

Anthropic is not a coding company. It is an intelligence company that chose to focus on coding first. As Claude's intelligence scales, it will be applied to every endeavor where human intelligence is useful. Understanding this is the key to understanding the future.

Opus 4.8 is now on DeepSWE. On the default high thinking effort, it scores 6% higher than Opus 4.7 xhigh, while also lowering average cost per task. Video

We’re excited to introduce Inherent, a lab designed from scratch to build AI agents that discover new knowledge. The coming era of machine-driven scientific inquiry demands a new kind of research institution and a new kind of AI. To achieve our mission, we live within the experiment, recursively self-improving the entire research organisation. We investigate questions including: - What does ‘AI taste’ look like in the sciences, and how can we build an institution that embraces this new aesthetic of discovery? - What new kinds of human-machine teaming will make the most of AI that can truly innovate? - How can we build recursive self-improvement at the collective level that continually increases human agency over outcomes? We have just closed a $50m seed round led by @IndexVentures and @radicalvcfund, with participation from other outstanding investors including NVentures (@nvidia's venture capital arm), @buildexante, Metaplanet, Macroscopic, @MythosVentures, Charlie Songhurst, @chalfs, @jluan, @dwarkesh_sp, @Thom_Wolf, @j_foerst and @maxjaderberg. We are advised by @matthewclifford. Inherent is a Public Benefit Corporation headquartered in London.

When we go from GPT-5.0 -> GPT-5.1 -> ... -> GPT-5.5, the number incrementing goes with improvements in capabilities and token efficiency (which translates to speed gains). With GPT-5.5 our best model yet. A simple strategy that we would like to continue.

JUST IN: Anthropic's private valuation has officially surpassed $1,000,000,000,000.00.

We're adopting the Linux Foundation’s OpenMDW framework across our open model families. This helps make open model licensing simpler and more consistent at scale. A single legal framework across models, code, documentation, and data helps reduce friction for developers and enterprises building with open source.

We took another look at the capability gap between open-weight and proprietary models. Since the start of the year, open-weight models have lagged the state of the art by four months.

Work continues on GPT-5.6! Earlier today a significantly better new checkpoint was made available internally

OpenAI is retiring o3 from ChatGPT on August 26, 2026 and GPT-4.5 on June 27, 2026 (these changes apply only to ChatGPT, not the API) I will miss GPT-4.5, as it was my favorite model, but I have to admit that I stopped using it a while ago because it was too slow

Artificial intelligences do not undergo experiences, do not possess a body, do not feel joy or pain, do not mature through relationships, and do not know from within what love, work, friendship or responsibility mean. Nor do they have a moral conscience, since they do not judge good and evil, grasp the ultimate meaning of situations, or bear responsibility for consequences. They may imitate or even simulate, but they do not understand what they produce, for they lack the affective, relational, and spiritual perspective through which human beings grow in wisdom. #MagnificaHumanitas

Nah. The only thing that caught us off guard was a bug we discovered last minute. And we decided to not ship the said bug.

We've raised $65 billion in Series H funding at a $965 billion post-money valuation, led by @AltimeterCap, Dragoneer, @Greenoaks, and @sequoia. This investment will help us advance our research and expand our capacity to meet growing demand for Claude.

We're releasing Paris 2.0, which, to our knowledge, is the world's first decentralized trained video generation model. We benchmarked it against a monolithic model trained on the same data and compute budget, and Paris 2.0 outperformed the monolithic by ~2x on FVD benchmark. Video

Thank god! I can turn off adaptive thinking and set reasoning effort myself. Finally!

Excited to release Opus 4.8 today! We heard your feedback on 4.7 and have made many fixes for 4.8. 4.8 understands nuances better, feels much more natural to talk to, and is overall a stronger collaborator on everything from coding to knowledge work.

Opus 4.8 is live! Even in Germany!!

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.