Claude Opus 5, Explained Simply
What Claude Opus 5 is, what it does well, and what it costs — released 2026-07-24 by Anthropic.
- Claude Opus 5 is Anthropic's newest, most advanced model, a big jump from the previous version.
- It can handle huge amounts of text at once—up to 1 million tokens—and "thinks" before answering by default.
- It costs the same as the older model: $5 per million tokens of input, $25 per million tokens of output.
- You can get it through the Claude API, Amazon Bedrock, Google Cloud, and Microsoft Foundry.
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Claude Opus 5 is a newly released AI language model from Anthropic, the company that builds the Claude assistant. It's aimed at developers and businesses who need a powerful model for hard tasks like coding, long-document analysis, or careful reasoning. If you've used older Claude models and wanted something smarter and more capable, this is the upgrade.
What it does well
- Big reasoning boost: It's described as a "step-change" improvement over Claude Opus 4.8, meaning it's noticeably smarter, not just a little better.
- Thinking by default: It uses a "thinking" mode automatically, which means it pauses to reason through a problem before answering—helpful for math, logic, coding, and multi-step questions.
- Huge memory: It can read and remember up to 1 million tokens of text at once. A token is roughly a piece of a word, so 1M tokens is like a whole book or a giant stack of notes.
How it compares
- vs. Claude Opus 4.8: Opus 5 is a major upgrade in quality, but the price stays the same. It also keeps the same large context window, so the main difference is smarter performance and thinking turned on by default.
What it costs and what it can handle
- Price: $5 per million input tokens (text you send in) and $25 per million output tokens (text it writes back).
- Context window: 1 million tokens, both as the default and the maximum.
- Max output: 128,000 tokens, which is a lot—enough for long reports or big code files.
Worth knowing
- It's mainly for developers and businesses right now, available through APIs and cloud platforms (Amazon Bedrock, Google Cloud, Microsoft Foundry), not a regular chat app.
- Since thinking is on by default, responses may take a bit longer or use more tokens than you'd expect.
- If you're moving over from an older Claude model, there are behavior changes, so Anthropic provides migration guidance to help you adjust.
This is our plain-language summary. Read the complete, official notes on the Claude official changelog ↗.
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