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Anthropic Unveils Claude Opus 5.5

Anthropic launches Claude Opus 5.5, promising Fable-level performance at a lower price

Anthropic has released Claude Opus 5.5, a new AI model the company says performs at roughly the same level as its Claude Fable 5.1 model on most work, but at a significantly lower cost.

Verdict on MSN · 18h

Anthropic rolls out Claude Opus 5.5 across major cloud platforms

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Claude Opus 5.5 delivers Fable 5.1 performance – and costs 40% less

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Anthropic Releases a New ‘Safest’ A.I. Model Amid Slowdown Debate

Anthropic on Tuesday unveiled a faster and cheaper version of its flagship artificial intelligence model that it also billed as its “safest,” in its first release since its chief executive called on t...

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Anthropic unveils Claude Opus 5.5

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Anthropic releases Claude Opus 5.5 and OpenAI counters with two cheaper GPT-6 models

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Running Claude Opus 5.5 Side-by-Side with the Previous Version | What Changed Wasn't Intelligence, but the Time to Completion

The new model released by Anthropic is not intended to push the boundaries of intelligence. On September 22, 2026, Anthropic released Claude Opus 5.5. The first thing the official announcement highlighted was not performance,

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 Opus 5 with stronger agent safeguards

KDnuggets

Everything Claude Opus 5.5 Actually Ships With

This article pulls together every verifiable number and detail from Anthropic's announcement, the platform documentation, the system card, and independent coverage, so you have one place to check the facts.

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What has changed in Claude Opus 5.5?

"Claude's new model is supposed to be amazing." However, even after reading the announcement, it's surprisingly difficult to grasp what exactly has improved and by how much.I compared the Claude Opus 5.

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New Claude Opus 5.5 Outperforms ChatGPT 6 Astra in Reasoning

Claude Opus 5.5 reduces token costs by 40% while boosting speed up to 2.5x. Read our full test of Anthropic's new AI model for coding tasks.