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Opus 5.5 — AI News Today

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Claude Opus 5.5 — released 22 September 2026, the first model in Anthropic's Claude 5.5 family and the new default Opus. Anthropic reports Claude Fable 5.1-level performance at roughly 40% lower running cost than Opus 5, a 1M-token context window, and strengthened cybersecurity safeguards. API id: claude-opus-5-5.

www.anthropic.com/claude-opus-5-5
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36 stories about Opus 5.5

11 from your feeds1 from search

About Opus 5.5

Opus 5.5 is a large language model by Anthropic. Claude Opus 5.5 — released 22 September 2026, the first model in Anthropic's Claude 5.5 family and the new default Opus. Anthropic reports Claude Fable 5.1-level performance at roughly 40% lower running cost than Opus 5, a 1M-token context window, and strengthened cybersecurity safeguards. API id: claude-opus-5-5. This page tracks 36 recent news stories about Opus 5.5, curated from 30+ sources and updated every 15 minutes.

Opus 5.5 — Coverage Momentum

11
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vs last month
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Sep 2026
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AprMayJunJulAugSep

First tracked Sep 2026. Most-citing sources: r/singularity (2), r/accelerate (1), r/ClaudeAI (1), The Verge AI (1). Data aggregated by Best AI News Today from 30+ sources.

36 stories
1 of 5 Top Stories
Breaking
Anthropic launches Opus 5.5, its first model since CEO Amodei called for AI slowdown
BreakingMedia

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

Anthropic has released a powerful new AI model just weeks after its chief executive publicly urged the industry to pump the brakes on development, a striking contradiction that underscores the impossible tension between calls for caution and the relentless commercial pressure to stay competitive. The company's move suggests that even AI safety advocates see restraint as a luxury they cannot afford in a race where falling behind could mean irrelevance. The contradiction raises a crucial question for regulators and investors alike: can any company in this space genuinely slow down, or is the competitive logic of artificial intelligence fundamentally incompatible with prudence?

Yahoo Finance faviconYahoo Finance·
Related AnthropicDario AmodeiDario AmodeiAI Safety

16 sources

CNBC faviconCNBCBloomberg.com faviconBloomberg.comABC News - Breaking News, Latest News and Videos faviconABC News - Breaking News, Latest News and Videos
Discussions

Okey this is increadible!!!

I know this is too early to judge but man wtf. Opus 5.5 is just like when mythos first released but cheap, faster and much more easy to understand and talk to. Probably this will be changed in 1-2...

r/ClaudeCode faviconr/ClaudeCode·
Related Mythos
Claude Opus 5.5 vs GPT-6 Astra: Which AI Agent Actually Wins?
Media

Claude Opus 5.5 vs GPT-6 Astra: Which AI Agent Actually Wins?

by Ankit Kumar — Most AI launches promise “smarter.” Claude Opus 5.5

Medium faviconMedium·
Media

Claude Opus 5.5 vs GPT-6 vs Gemini vs Grok: Which AI Model Is Actually Worth Paying For Now

Anthropic’s new model tops GPT-6 Astra on most of its own charts for a fraction of the cost. Here is how it stacks up against ChatGPT… Continue reading on Artificial Intelligence in Plain English »

Medium · Faisal haque faviconMedium · Faisal haque·
Discussions

Opus 5.5 is 40% cheaper while being 30% faster than opus 5.

r/ClaudeAI faviconr/ClaudeAI·
Research

v2.1.280

What's changed Added Claude Opus 5.5 (claude-opus-5-5), now the default Opus model — 1M context, $4/$20 per Mtok with $0.20/Mtok cache reads Added mouse support to more lists in fullscreen mode: the...

Claude Code Releases faviconClaude Code Releases·
Discussions

Anthropic is offering a free reset to "Explore Opus 5.5"

Honestly kinda scared to use it right now ,as I have a feeling it would be a bit of a waste considering it resets either way tomorrow for me.

r/ClaudeAI faviconr/ClaudeAI·
Related Anthropic
Claude Opus 5.5: Keeping safety ahead of capabilities
Media

Claude Opus 5.5: Keeping safety ahead of capabilities

SD Times faviconSD Times·
Discussions

Opus 5.5 One Shot Video Generation

I was bored at work while Opus 5.5 dropped, so I gave it a simple prompt to make a creepy feeling video about my job. My only prompt to create this video was - "I would like to see you create a 1...

r/ClaudeAI faviconr/ClaudeAI·
Claude Opus 5.5 is now available on AWS
Research

Claude Opus 5.5 is now available on AWS

Claude Opus 5.5, Anthropic's most capable Opus model for agentic coding, knowledge work, and long-running tasks, is now available on Amazon Bedrock and Claude Platform on AWS. This post covers what's...

AWS ML Blog faviconAWS ML Blog·
Media

Anthropic releases Claude Opus 5.5, and it's not just more powerful: it's cheaper, too

XDA faviconXDA·
Discussions

They launched Opus 5.5!!

With price reduction too!!! https://www.anthropic.com/claude-opus-5-5

r/ClaudeAI faviconr/ClaudeAI·
Research

Introducing Claude Opus 5.5

Introducing Claude Opus 5.5

Anthropic faviconAnthropic·
Research

Anthropic Releases Claude Opus 5.5: Fable 5.1-Level Performance at 40% Lower Running Cost Than Opus 5

Anthropic has released Claude Opus 5.5, the first model in its new Claude 5.5 family. The team states it performs at the level of Claude Fable 5.1 on most work. It also costs 40% less to run than...

Marktechpost faviconMarktechpost·
Claude Opus 5.5 delivers Fable 5.1 performance – and costs 40% less
Media

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

ZDNET faviconZDNET·
Anthropic Releases a New A.I. Model, Opus 5.5, Amid Safety Debate
Media

Anthropic Releases a New A.I. Model, Opus 5.5, Amid Safety Debate

The New York Times faviconThe New York Times·
Discussions

Did Anthropic just find a new way to benchmax Opus 5.5 without actually giving subscribers that performance?

https://preview.redd.it/rmsgatzzm3rh1.png?width=737&format=png&auto=webp&s=9666afb4371d440730ab75d40a2e605d8c78b574 Opus 5.5 now has a Max effort mode that uses 6x usage. So if Anthropic benchmarks...

r/ClaudeAI faviconr/ClaudeAI·
Related Anthropic
Media

Claude Opus 5.5 matches Fable 5.1 performance at lower cost and promises less "Claudish" writing - the-decoder.com

the-decoder.com faviconthe-decoder.com·
Media

Anthropic releases Opus 5.5 with lower prices and Fable-level performance

Anthropic called it "the strongest-performing model we've tested to date."

TechCrunch AI faviconTechCrunch AI·

Frequently Asked Questions

What is Opus 5.5?

Opus 5.5 is Claude Opus 5.5 — released 22 September 2026, the first model in Anthropic's Claude 5.5 family and the new default Opus. Anthropic reports Claude Fable 5.1-level performance at roughly 40% lower running cost than Opus 5, a 1M-token context window, and strengthened cybersecurity safeguards. API id: claude-opus-5-5.

Where can I access Opus 5.5?

Opus 5.5 is available at https://www.anthropic.com/claude-opus-5-5. It's developed by Anthropic.

What is the latest news about Opus 5.5?

As of today, there are 36 recent stories about Opus 5.5. Recent headlines include: Anthropic releases Claude Opus 5.5, beating Fable 5.1 on key agentic benchmarks at 60% cheaper API price; Okey this is increadible!!!; Claude Opus 5.5: Keeping safety ahead of capabilities. Updated every 15 minutes.

What other LLM AI models are there?

Opus 5.5 is part of the LLM model category. Browse all comparable AI llm models with live news mentions and benchmarks.