Claude Opus 4.6 Is Now Live on BLACKBOX AI

Anthropic just shipped their latest flagship model — and it's already available inside BLACKBOX.

Anthropic just shipped their latest flagship model — and it's already available inside BLACKBOX.

Claude Opus 4.6 launched today with major upgrades to agentic coding, long-context reasoning, and self-correction. We've added it as a model option across BLACKBOX so you can put it to work immediately.

What the Benchmarks Say

Opus 4.6 leads on Terminal-Bench 2.0, the top agentic coding evaluation right now. It also takes the highest score on Humanity's Last Exam, a multidisciplinary reasoning benchmark, and outperforms GPT-5.2 on real-world knowledge work tasks across finance, legal, and other domains.

The numbers are solid. Whether they translate to your specific workflow is something you can test for yourself — that's the point of making it available day one.

What's Actually Useful

Beyond benchmark scores, here's what matters for developers building inside BLACKBOX:

1M token context window. Feed it entire codebases, full documentation sets, or complex multi-file projects. It can hold and reason across all of it without losing track.

Less context rot. AI models typically degrade as conversations get longer. Opus 4.6 scores 76% on long-context retrieval benchmarks where previous models hit under 20%. It stays sharp deeper into sessions.

Better self-correction. The model reviews its own output, revisits its reasoning, and catches mistakes before you have to point them out. Less back-and-forth, more first-attempt accuracy.

128k output tokens. Bigger outputs in a single pass — fewer broken-up requests when you're generating larger files or complex implementations.

How to Use It in BLACKBOX

Select Claude Opus 4.6 as your model when starting a new session or switch to it mid-project. It works across all BLACKBOX features — the browser editor, CLI, multi-agent execution, and encrypted workspace.

Best suited for deep reasoning tasks, large codebase work, and complex debugging. For lighter tasks where speed is the priority, the other models in BLACKBOX still make more sense.