I had high hopes for the new Opus release. It massively exceeded them. Opus 5.5 is an incredible model.↗

Opus 5.5 is way, way, way better than Opus 5. Sorry about that model, please try this one.↗

I have tested GPT-6 Astra this week. It is a show horse, not a workhorse. Super fun to use and showy, does crazy good stuff, and design-wise it's the most interesting model I've run. But I don't know if I'd use it for a real day to day engineering/product work. It's not as trustw…↗

Router has been in production for a few weeks and the savings have exceeded the original benchmarks. Measuring billed usage vs the same workload priced at Opus rates, we’ve found: 43% aggregate cost savings 61% of sessions are at least 80% cheaper↗

Anthropic is losing the mandate of heaven ## Four months ago, in early February, Anthropic was the darling. OpenAI was the dominant behemoth to root against. Over the last 1-2 years, we'd seen the Sam ouster / return drama, Ilya and Mira had left, the company had raised $40B, h…↗

Opus 4.8 launched and then it LIED TO ME (well, hallucinated 3x) great at one shot, but after that... no hype take now on yt: youtube.com/watch?v=h0gZf1…↗

We partnered with @PrimeIntellect to build Fast Ask, a small RL-trained subagent that helps our Sheets agent find answers in spreadsheets. It scores +4% over Opus on exact match accuracy at Haiku latency.↗

Opus 4.7 feels more intelligent, agentic, and precise than 4.6. It took a few days for me to learn how to work with it effectively, to fully take advantage of its new capabilities. Will post a few more tips throughout the day, starting with this blog post: …↗

About $500 in Opus 4.6 tokens and $50 in GPT 5.4. This included a couple of re-runs as I refined the prompt. Eventually used GPT 5.4 to refine the results, dedupe some events, tighten descriptions, etc. But the first shot was good enough and it was certainly < $100. Probably GPT…↗

We're bringing the advisor strategy to the Claude Platform. Pair Opus as an advisor with Sonnet or Haiku as an executor, and get near Opus-level intelligence in your agents at a fraction of the cost.↗

When Opus 4.5 came out, it was a one-way door to a new way of engineering. Agents now do most of our coding. Knowing the inherent flaws and over-confidence of LLMs, we sent a clear message to our teams. Vibing and mission-critical infrastructure don’t go together. We’re sharing…↗

introducing usecomputer a cli written in Zig to let any agent control a computer mouse & keyboard the hardest part of controlling a remote agent is accepting macOS permission dialogs. here is an example of Opus enabling a security setting via useomputer, kimaki & opencode w…↗

I’ve figured out a new way of working that’s unlocked my speed of iteration massively. Here’s how it works: I have a simple cron job that runs every night at midnight. It gathers information from my database on user activity, marketing stats, and a couple other data points th…↗

a quick opus 4.5 vibecoding tip ask claude to make state machine diagrams of existing components this causes it to map out all paths (which, it will default to being lazy otherwise) but also helps you verify if it's doing things correctly at a systems level↗

The harnesses are still not optimally utilizing the models Everyone rightfully loves claude code right now, but it is clear to me it is underutilizing the capability of opus. The lowest hanging fruit is /init in existing code bases. It does a good job of building it's …↗

how i build features & fix bugs with cursor: 1.select opus 4.5/gpt-5.1-codex to ask about the changes i want to make so i understand the relevant code 2.switch to plan mode and describe the changes i want to make (keep the same model) 3.reply to the follow-up questions i’m get…↗

5. Vision is improved. Opus is better at image processing and data extraction, especially with multiple images. For dense images, give it a cropping tool to "zoom" in on regions. We've seen consistent uplift on image evals with this.↗