Best AI News today

Sonnet 5.5 — AI News Today

LLM AnthropicUnited States flag

Claude Sonnet 5.5 — the second model in Anthropic's Claude 5.5 family, released 28 September 2026. It scores 70.6% on Terminal-Bench 4.0 at the same $2/$10 per-million-token price as Sonnet 5, lands within two points of Opus 5.5 on GDPval-AA, and is positioned as a cheaper, faster everyday work model.

www.anthropic.com/news/claude-sonnet-5-5
People:
Products:ClaudeToolClaude Agent SDKToolClaude CodeAssistantClaude DesignPlatformModel Context ProtocolPlatform

181 stories about Sonnet 5.5

2 from your feedssearching across sources...

About Sonnet 5.5

Sonnet 5.5 is a large language model by Anthropic. Claude Sonnet 5.5 — the second model in Anthropic's Claude 5.5 family, released 28 September 2026. It scores 70.6% on Terminal-Bench 4.0 at the same $2/$10 per-million-token price as Sonnet 5, lands within two points of Opus 5.5 on GDPval-AA, and is positioned as a cheaper, faster everyday work model. This page tracks 181 recent news stories about Sonnet 5.5, curated from 30+ sources and updated every 15 minutes.

Sonnet 5.5 — Coverage Momentum

28
This month
↓49%
vs last month
83
All-time
Sep 2026
Peak month
0
0
0
0
55
28
MayJunJulAugSepOct

First tracked Sep 2026. Most-citing sources: Medium (23), r/ClaudeAI (16), r/singularity (9), r/accelerate (6). Data aggregated by Best AI News Today from 30+ sources.

181 stories
1 of 5 Top Stories
Breaking
Claude Sonnet 5.5 vs GPT-6 Sol: Benchmarks, Specs, Evals and Pricing Compared
BreakingMedia

Claude Sonnet 5.5 vs GPT-6 Sol: Benchmarks, Specs, Evals and Pricing Compared

The race to build the world's most capable AI system just got measurably tighter, with Anthropic's Claude Sonnet 5.5 and OpenAI's GPT-6 Sol trading punches across reasoning, coding, and real-world problem-solving tasks in ways that challenge long-held assumptions about which company has the technological edge. What started as a clear hierarchy of AI dominance has fractured into a genuine competition, with pricing and accessibility emerging as the real battleground that could reshape how businesses deploy artificial intelligence at scale. The stakes extend beyond Silicon Valley bragging rights: these models are being embedded into everything from Amazon's cloud infrastructure to Google's search results, meaning the winner in this technical d

Kingy AI faviconKingy AI·
Related OpenAIGoogle AnthropicAmazonGPT-6 Sol+1

24 sources

OpenAI faviconOpenAIMoneycontrol.com faviconMoneycontrol.com9to5Google favicon9to5Google
Most of Your Claude Code Tokens Are Cache Reads. Anthropic Just Halved Their Price on Sonnet 5.5.
Media

Most of Your Claude Code Tokens Are Cache Reads. Anthropic Just Halved Their Price on Sonnet 5.5.

by Kaaroxen — I measured over 4,000 API calls to see what that actually saves. It isn’t half, and the reason changes where you should look for savings.

Medium faviconMedium·
Gemini Free Went Flash-Lite on Oct 9. 5 Plans Under $10, Ranked
Media

Gemini Free Went Flash-Lite on Oct 9. 5 Plans Under $10, Ranked

ChatGPT Free runs GPT-6 Luna, Claude Free runs Sonnet 5.5, free Gemini gets 32K tokens. What $0, $4.99 and $8 buy now. Continue reading on Medium »

Medium · Automation Labs faviconMedium · Automation Labs·
Media

Anthropic halved Sonnet 5.5 cache reads, and its own tool showed the old price for two days

MIXED Reality News faviconMIXED Reality News·
Related Anthropic
Sonnet 5.5 Cut My .NET Agent Bill by 3.2%, Not 30%. Here’s the 27% I Had to Fix Myself.
Media

Sonnet 5.5 Cut My .NET Agent Bill by 3.2%, Not 30%. Here’s the 27% I Had to Fix Myself.

by Adnan Khan — Monday 8:14 AM. Karan drops the VentureBeat headline in #dotnet Slack “Anthropic launches Claude Sonnet 5.5 with 30% cost reduction…

Cubed faviconCubed·
Sonnet 5.5 Landed Sept 28. 5 Ways It Breaks Your Sonnet 5 Code.
Media

Sonnet 5.5 Landed Sept 28. 5 Ways It Breaks Your Sonnet 5 Code.

by Automation Labs — Same $2/$10 as Sonnet 5. Forced tool_choice gone, thinking: disabled gone, thinking blocks bound to the model. The 5 breaks, ranked.

Medium faviconMedium·
Anthropic, Google and Mistral Unveil Their Latest AI Models: What’s New and Why It Matters
Media

Anthropic, Google and Mistral Unveil Their Latest AI Models: What’s New and Why It Matters

Check out the latest on Anthropic’s Claude Haiku 5.5 and Sonnet 5.5, along with Gemini 4 Argon and Mistral Large 4.

CNET faviconCNET·
[AI News Summary] Claude Sonnet 5.5 Released, NVIDIA's AI Safety Foundation, and Pre-OpenAI DevDay 2026 Information
Media

[AI News Summary] Claude Sonnet 5.5 Released, NVIDIA's AI Safety Foundation, and Pre-OpenAI DevDay 2026 Information

The AI news for September 29, 2026, highlights that the major theme is not just about "smarter AI," but how to use AI for actual work at high speed, low cost, and with safety. Anthropic has announced...

note faviconnote·
Sonnet 5.5 Makes the Default Model Choice Obvious
Media

Sonnet 5.5 Makes the Default Model Choice Obvious

by Tajamul Khan — When the quality gap is tiny and the price gap is not, production teams should rethink what they call by default.

Medium faviconMedium·
When Should You Use Sonnet 5.5 Instead of Opus 5.5?
Media

When Should You Use Sonnet 5.5 Instead of Opus 5.5?

The practical Claude workflow I would wish every developer used before choosing a model Continue reading on MeetCyber »

Medium · Raviteja Nekkalapu faviconMedium · Raviteja Nekkalapu·
Discussions

Sonnet 5.5 - GPT 6 instant

Which one would you favor for general chat ?

r/ChatGPT faviconr/ChatGPT·
Claude 5.5 Latest Information: A Guide to Choosing Between Opus, Sonnet, and Haiku
Media

Claude 5.5 Latest Information: A Guide to Choosing Between Opus, Sonnet, and Haiku

Following the release of Opus 5.5 and Sonnet 5.5 in September 2026, Haiku 5.5 was released on October 7. The Claude 5.5 series is now complete 🤖With this update, in addition to each model's ...

note faviconnote·
Claude Haiku 5.5 vs Sonnet 5.5 vs Opus 5.5
Media

Claude Haiku 5.5 vs Sonnet 5.5 vs Opus 5.5

by Mehul Gupta — Which Claude 5.5 model shall you use?

Data Science in Your Pocket faviconData Science in Your Pocket·
Claude Sonnet 5.5 vs Opus 5.5: Which One Is Worth Your Money?
Media

Claude Sonnet 5.5 vs Opus 5.5: Which One Is Worth Your Money?

by TechByRahmat — One costs more, but is it actually better at coding? Here’s what developers should know before spending money on either model.

Skill Stuff faviconSkill Stuff·
Media

A Look Back at Anthropic's News Over the Last Six Months — From Opus 5.5 and Cowork to the Government-Mandated Shutdown, What Has Changed?

Claude Opus 4.7 in April, Opus 4.8 in May. Fable 5, positioned above Opus, and Sonnet 5 in June. Opus 5 in July. Fable 5.1, Opus 5.5, and Sonnet 5.5 in September, followed by Haiku 5.5 in October.

note faviconnote·
Media

Anthropic Released 3 New Claude Models. Here’s the Difference.

Opus 5.5, Sonnet 5.5, and Haiku 5.5 are not really competing with each other. Continue reading on Medium »

Medium · Tom Zhang faviconMedium · Tom Zhang·
Your long-context agent bill is a memory-layout problem
Media

Your long-context agent bill is a memory-layout problem

by Sai Ram Kotha — Update, October 9, 2026: the worked example now uses the current Sonnet 5.5 cache-read price of $0.10 per million (it was $0.20 when first…

Medium faviconMedium·
Media

Claude Intros Sonnet 5.5 with Model-Switching Cybersecurity Safeguards

THE Journal: Technological Horizons in Education faviconTHE Journal: Technological Horizons in Education·
Claude Sonnet 5.5 vs. Opus 5.5: 42% cheaper and perfect on every run
Media

Claude Sonnet 5.5 vs. Opus 5.5: 42% cheaper and perfect on every run

The New Stack faviconThe New Stack·

Frequently Asked Questions

What is Sonnet 5.5?

Sonnet 5.5 is Claude Sonnet 5.5 — the second model in Anthropic's Claude 5.5 family, released 28 September 2026. It scores 70.6% on Terminal-Bench 4.0 at the same $2/$10 per-million-token price as Sonnet 5, lands within two points of Opus 5.5 on GDPval-AA, and is positioned as a cheaper, faster everyday work model.

Where can I access Sonnet 5.5?

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

What is the latest news about Sonnet 5.5?

As of today, there are 181 recent stories about Sonnet 5.5. Recent headlines include: Most of Your Claude Code Tokens Are Cache Reads. Anthropic Just Halved Their Price on Sonnet 5.5.; [AI News Summary] Claude Sonnet 5.5 Released, NVIDIA's AI Safety Foundation, and Pre-OpenAI DevDay 2026 Information; Claude Sonnet 5.5 vs Opus 5.5: Which One Is Worth Your Money?. Updated every 15 minutes.

What other LLM AI models are there?

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