Anthropic Launches Claude Opus 4.5 With Improved Coding and Agent Capabilities

[MacRumors]

Anthropic today announced the launch of Claude Opus 4.5, which it says is the "best model in the world for coding, agents, and computer use." It's improved over prior models for everyday tasks like deep research, and it is a "step forward in what AI systems can do."

According to feedback Anthropic received from early testers, Claude Opus 4.5 can complete tasks that were impossible for Sonnet 4.5, and that it is able to handle ambiguity and reason about tradeoffs without hand-holding. The Opus 4.5 model offers better vision, reasoning, mathematics skills, and coding than prior versions of Claude.

Along with the Opus update, Anthropic is updating its apps, the Claude Developer Platform, and Claude Code. There are tools for longer-running agents, and options to use Claude in Excel, Chrome, and on the desktop.

In the Claude apps, users will no longer run into limits during a long conversation. Claude is able to automatically summarize earlier context, which means the conversation can keep going endlessly. Claude for Chrome is available to all Max users, and Claude for Excel beta access is now available to all Max, Team, and Enterprise users.

Claude Code is now available in the desktop app, and with Opus 4.5, it is able to build more precise plans and execute them more thoroughly. Claude is able to ask clarifying questions upfront and then build a user-editable plan before executing.

Claude Opus 4.5 is available today across Anthropic's apps and its API. Opus-specific caps have been removed for Claude and Claude Code users with access to Opus 4.5, and for Max and Team Premium members, overall usage limits have increased.

Article Link: Anthropic Launches Claude Opus 4.5 With Improved Coding and Agent Capabilities

 

[novagamer]

Opus 4.5 is awesome and the usage limits are now finally generous. There is some great detail about what they've done and the videos for this release are really worth watching, especially the one comparing Sonnet 4.5 vs. Opus 4.5 on context usage and problem solving / opening 'locks'.

If you used Claude Code, compacting now works in chats automatically.

I'm not sure if this is good or not for very long context, I tend to prefer summarizing at the end and carrying that forward manually, I imagine the context window is sliding once the compaction happens so you probably won't be able to get a real summary like you would before, but for people who change topics or keep a long thread open it will probably be a welcome change. I'd like this toggle-able per chat but I doubt that will happen.

Max users get signiifcantly more Opus usage than before, as much as Sonnet previously. Opus is the default model for me for the first time ever in the UI which is great. It even defaulted to extended thinking (!).

I'm in the middle of a 3 hour session now and have used les than 1% of my week; easily 1/3+ less than usual. VERY happy with this from Anthropic and can't wait to use Opus 4.5 with WebStorm in a few weeks to refactor some typescript.