Claude Opus 5 is out: how to try Anthropic's flagship online

What happened

On July 24, 2026 Anthropic released Claude Opus 5 — the new top model of the Claude line. It leads Frontier-Bench in software engineering, carries a 1M-token context window with up to 128K output, and prices did not go up compared to Opus 4.7.

What is new in Opus 5

The defining change is self-verification: Opus 5 checks its own output against the task and iterates until the job is actually done. For long agentic runs — repository refactoring, multi-step analysis, tool chains — this changes how the model feels more than any benchmark number.

• Frontier-Bench: industry-best software engineering results.
• Effort modes: low, medium, and high — you pick the balance of speed and depth.
• 1M context: a whole project or a stack of documents in one chat.
• Visual and 3D tasks: a clear step up in image and spatial understanding.

How to try Claude Opus 5 without a subscription

You do not need a monthly plan to use the flagship. On NetRoom it works pay-as-you-go:

1. Sign up on NetRoom.
2. Top up your balance.
3. Open the Claude Opus 5 page and start chatting.

You pay only for the tokens you actually use. Exact rates are on the model page and the pricing page.

Opus 5 vs Sonnet and Haiku

Opus 5 is for the hardest work: architecture, long reasoning chains, code where mistakes are expensive. For everyday tasks, Claude Sonnet 4.6 is cheaper and faster, and Claude Haiku 4.5 covers high-volume scenarios. All three share one NetRoom balance, so you can switch mid-conversation.

FAQ

Do I need a subscription? No — NetRoom is pay-as-you-go: top up a balance and spend it across every model in the catalog.

How much does it cost? Per-token billing. Estimate your workload in the price calculator.

What changed vs Opus 4.7? Self-verification, effort modes, the Frontier-Bench lead in coding, and better image understanding — at unchanged prices.

Try it now: create a NetRoom account and launch Opus 5 from the model page.