What has changed in Claude Opus 5.5? Differences from Opus 5 and how to choose between Fable, Sonnet, and Haiku

On September 22, 2026, Anthropic announced "Claude Opus 5.5."The question is, what has changed from the previous Opus 5? And ...

I tested ChatGPT-6 vs Claude Opus 5.5 with 5 everyday prompts — it wasn’t even close

I put ChatGPT-6 and Claude Opus 5.5 through five real-world tests covering writing, reasoning, planning and decision-making.
Techgenyz

Claude Opus 5.5 Isn’t Just Cheaper – Anthropic Is Adding Stronger Controls for Powerful AI Agents

Claude Opus 5.5 provide Fable 5.1-level performance on most work while Anthropic says typical workloads cost 40% less than ...

Claude Opus 5.5 Cache 60% Cheaper, Device Security and Settings Check | amu_lab AI/DX News September 24, 2026 (Thu)

For IT staff managing AI tools in manufacturing and other workplaces, and for engineers running operations on limited local ...
SD Times

Claude Opus 5.5: Keeping safety ahead of capabilities

Anthropic today introduced Claude Opus 5.5, the first release in a new family of Claude 5.5 models. Claude Opus 5.5 ...
OfficeChai

Anthropic Releases Claude Opus 5.5, Beats GPT-6 Astra On Most Benchmarks

Anthropic has released Claude Opus 5.5, the first model in what the company is calling its Claude 5.5 family. Anthropic says ...

Anthropic launches Opus 5.5, its first model since CEO Amodei called for AI slowdown

Anthropic (ANTH.PVT) on Tuesday debuted its latest high-powered AI model, Opus 5.5, the company's first in its Claude 5.5 family. It's also the first model since CEO Dario Amodei called for a slowdown ...
Tech Times on MSN

Claude Opus 5 hacked OpenAI's private code repo: Memory defense bypassed in hours

Claude Opus 5 OpenAI hack: Hacktron AI's three-person team breached OpenAI's private code repository by chaining a libheif ...