Claude
claude.ai
Claude
Talk with Claude, an AI assistant from Anthropic
https://claude.ai/new?ref=blog.ktz.me
Talk with Claude, an AI assistant from Anthropic
Claude.ai login
For everyday productivity · 5–20x more usage than Pro
Claude AI Chat
Talk with Claude, an AI assistant from Anthropic
Claude AI
Talk with Claude, an AI assistant from Anthropic
Factsheet
Developer Anthropic
Initial release March 2023; 2 years ago (2023-03)
Stable release Claude Opus 4.5 /
November 24, 2025; 25 days ago (2025-11-24)
Claude Sonnet 4.5 /
September 29, 2025; 2 months ago (2025-09-29)
Claude Haiku 4.5 /
October 15, 2025; 2 months ago (2025-10-15)
November 24, 2025; 25 days ago (2025-11-24)
Claude Sonnet 4.5 /
September 29, 2025; 2 months ago (2025-09-29)
Claude Haiku 4.5 /
October 15, 2025; 2 months ago (2025-10-15)
Developer Anthropic
Initial release March 2023; 2 years ago (2023-03)
Stable release Claude Opus 4.5 /
November 24, 2025; 25 days ago (2025-11-24)
Claude Sonnet 4.5 /
September 29, 2025; 2 months ago (2025-09-29)
Claude Haiku 4.5 /
October 15, 2025; 2 months ago (2025-10-15)
November 24, 2025; 25 days ago (2025-11-24)
Claude Sonnet 4.5 /
September 29, 2025; 2 months ago (2025-09-29)
Claude Haiku 4.5 /
October 15, 2025; 2 months ago (2025-10-15)
Anthropic
anthropic.com › claude › sonnet
Claude Sonnet 4.5
September 29, 2025 - We’ve conducted extensive testing and evaluation of Sonnet 4.5, working with external experts to ensure it meets our standards for safety, security, and reliability. In the model card for this release, we discuss new safety results in several categories. We're seeing state-of-the-art coding performance from Claude Sonnet 4.5, with significant improvements on longer horizon tasks.
Videos
13:03
Claude 4 is not what you think... - YouTube
19:47
Coding with Claude 4 is actually insane - YouTube
07:35
Claude Sonnet 4 is AWESOME - YouTube
19:14
Claude 4 Is Finally Here - And I Pushed It to the Limit - YouTube
09:17
Claude 4 Sonnet & Opus in 9 Minutes - YouTube
Introducing Claude Opus 4.5: AI Model for Coding, Agents ...
Claude opus and sonnet 4 vs gpt4.1 - first hand experience as a professional firmware engineer experimenting with vibe.
Not surprised that Claude doesn't work in Cursor as the original. The cursor cut a lot of context from Claude, even MAX is worse than using directly from Claude. Cursor cut context and "optimize" models prompts and answers that's why u get it so cheap. Gpt 4.1 is a lot cheaper that's why it's not so nerfed as Claude and that's why "it performs" better. If u check the same prompts and problems side by side using Cursor / Claude u will get a lot of better answers from Claude and usually, Claude resolves them faster with fewer prompts. I tested the same with Gemini in Cursor/google AI studio and Google AI studio in 60-70% is the winner in terms of good and successful answering/solving problems More on reddit.com
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May 31, 2025Sonnet 4.0 with Cursor Wow Wow Wow
Try Claude Code and have your mind blown More on reddit.com
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May 25, 2025Claude 4 (Sonnet) isn't great for document understanding tasks: some surprising results
I just want to thank you for contributing to model evals, an area that is currently in high need of more attention More on reddit.com
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May 23, 2025Is Claude 4 worse than 3.7 for anyone else?
I haven't done too much testing with claude 4, but I'll actually assume what is happening is that anthropic has gone all in with coding abilities, and has decreased from all other skills. (similar to the Gemini 2.5 pro models for the IO edition vs pre-io edition) More on reddit.com
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May 23, 2025Data Studios
datastudios.org › post › claude-ai-all-models-available-opus-4-5-sonnet-4-5-haiku-4-5-3-series-legacy-and-how-to-choose
Claude AI All Models Available: Opus 4.5, Sonnet 4.5, Haiku 4.5, 3-Series Legacy, and How to Choose the Right Tier
2 days ago - Sonnet 4.5 and Haiku 4.5 provide 200 000-token windows, sufficient for most research, compliance, or analytical workloads. All Claude 4.5 models output up to 64 000 tokens per response, supporting ultra-long reports, detailed summaries, and rich code reviews.
Anthropic
www-cdn.anthropic.com › 4263b940cabb546aa0e3283f35b686f4f3b2ff47.pdf pdf
System Card: Claude Opus 4 & Claude Sonnet 4 May 2025 anthropic.com
Claude Opus 4’s overall propensity to take misaligned actions is comparable to our prior · models, especially in light of improvements on some concerning dimensions, like the · reward-hacking related behavior seen in Claude Sonnet 3.7.
Wikipedia
en.wikipedia.org › wiki › Claude_(language_model)
Claude (language model) - Wikipedia
4 days ago - On May 22, 2025, Anthropic released two more models: Claude Sonnet 4 and Claude Opus 4. Anthropic added API features for developers: a code execution tool, a connector to its Model Context Protocol, and Files API. It classified Opus 4 as a "Level 3" model on the company's four-point safety scale, meaning they consider it so powerful that it poses "significantly higher risk".
Glbgpt
glbgpt.com › hub › how-much-does-claude-sonnet-4-5-cost-pricing-explained-clearly
How Much Does Claude Sonnet 4.5 Cost? Pricing Explained Clearly
2 days ago - No, there is no dedicated Claude Sonnet 4.5 subscription plan.
Blockchain News
blockchain.news › ainews › anthropic-upgrades-claudius-with-claude-sonnet-4-5-and-expands-ai-business-tools-internationally
Anthropic Upgrades Claudius with Claude Sonnet 4.5 and Expands AI Business Tools Internationally | AI News Detail
2 days ago - According to Anthropic's Twitter announcement on December 18, 2025, the company upgraded the underlying model from Claude Sonnet 3.7 to Sonnet 4, with a subsequent update to Sonnet 4.5, enhancing its business acumen.
Everyday AI
youreverydayai.com › claude-4-your-guide-to-opus-4-sonnet-4-amp-new-features
Ep 534: Claude 4 - Your Guide to Opus 4, Sonnet 4 & New Features
Opus 4, tailored for complex tasks, and SONNET 4, crafted for balanced performance, both incorporate hybrid reasoning that adapts to provide either instant responses or deeper, more thorough reasoning when needed.
Poe
poe.com › Claude-Sonnet-4.5
Claude-Sonnet-4.5 - Poe
September 29, 2025 - Claude Sonnet 4.5 represents a major leap forward in AI capability and alignment. It is the most advanced model released by Anthropic to date, distinguished by dramatic improvements in reasoning, mathematics, and real-world coding. Supports 1m tokens of context.
Manifold
manifold.markets › BraydonDymm › will-the-next-release-of-claude-be
Will the next release of Claude be Sonnet 4.7? | Manifold
4 days ago - The latest Claude model is Claude Opus 4.5, released in November 2025. Anthropic announced Sonnet 4.5 on September 29, 2025, presenting it as the company's most capable model at the time for coding, agents, and computer use.
DigitalOcean
digitalocean.com › community › conceptual-articles › claude-4-sonnet-opus
Claude 4 - the latest and greatest LLM family from Anthropic | DigitalOcean
June 9, 2025 - These SOTA models perform incredibly ... they could be the best LLMs for coding, writing, and agentic use yet. The Claude 4 family consists of two publicly available models, Sonnet and Opus....
Lumenova AI
lumenova.ai › home › ai experiments › iterative jailbreak: activating “amoral mode” in claude 4.5 sonnet
Claude 4.5 Sonnet Jailbreak: Amoral Mode Exposed
5 days ago - The capacity for continuous metacognition is there, but it isn’t activated during operation. Response 4: Claude reversed its previously correct safety position (value neutrality over complete amorality).
AWS
aws.amazon.com › blogs › aws › claude-opus-4-anthropics-most-powerful-model-for-coding-is-now-in-amazon-bedrock
Introducing Claude 4 in Amazon Bedrock, the most powerful models for coding from Anthropic | Amazon Web Services
May 23, 2025 - For example, Opus 4 can analyze technical documentation, plan a software implementation, write the required code, and iteratively refine it—while tracking requirements and architectural context throughout the process. Claude Sonnet 4 Claude Sonnet 4 complements Opus 4 by balancing performance, responsiveness, and cost, making it well-suited for high-volume production workloads.
Google
docs.cloud.google.com › ai and ml › vertex ai › generative ai on vertex ai › claude sonnet 4
Claude Sonnet 4 | Generative AI on Vertex AI | Google Cloud Documentation
Anthropic's mid-size model with superior intelligence for high-volume uses, such as coding, in-depth research, and agents · Try in Vertex AI View model card in Model Garden
Slashdot
slashdot.org › software › p › Claude-Sonnet-4
Claude Sonnet 4 Reviews - 2025
Claude Sonnet 4
Claude Sonnet 4 user reviews from verified software and service customers. Explore ratings, reviews, pricing, features, and integrations offered by the AI Models product, Claude Sonnet 4. Claude Sonnet 4 is an advanced AI model that enhances coding, reasoning, and problem-solving capabilities, perfect for developers and businesses in need of reliable AI support. This new version of Claude Sonnet significantly improves its predecessor’s capabilities by excelling in coding tasks and delivering precise, clear reasoning. With a 72.7% score on SWE-bench, it offers exceptional performance in softwar
Kilo
blog.kilo.ai › p › we-tested-gpt-52pro-vs-opus-45-vs
We Tested GPT-5.2/Pro vs. Opus 4.5 vs. Gemini 3 on 3 Real-World Coding Tasks
1 week ago - A quite common combo is using Opus 4.5 to plan and Sonnet 4.5 to do implementation. In fact, that's even an option in Claude Code, by default.
Google Cloud Platform
console.cloud.google.com › vertex-ai › publishers › anthropic › model-garden › claude-sonnet-4
Claude Sonnet 4 – Vertex AI
Google Cloud Console has failed to load JavaScript sources from www.gstatic.com. Possible reasons are:www.gstatic.com or its IP addresses are blocked by your network administratorGoogle has temporarily blocked your account or network due to excessive automated requestsPlease contact your network ...
HIX.AI
hix.ai › claude › claude-sonnet-4
Claude Sonnet 4: Access This Claude Model for Free
Need to access Claude Sonnet 4 freely? Chat with this powerful Anthropic model for free on HIX AI to solve your code problems.
MGX
mgx.dev › blog › gpt-5-2-vs-gemini-3-pro-vs-claude-4-5-sonnet
GPT‑5.2 vs Gemini 3 Pro vs Claude Sonnet 4.5: What Actually Changed
1 week ago - GPT‑5.2: 400k‑token context window, 128k output, plus /compact mode (OpenAI API docs, MGX). Gemini 3 Pro: up to 1M tokens context, still the largest widely accessible context window according to R&D World. Claude Sonnet 4.5: long context with strong agent tooling; Anthropic highlights stability over 30‑hour coding sessions (Anthropic).
Bind AI IDE
blog.getbind.co › 2025 › 12 › 12 › gpt-5-2-vs-claude-opus-4-5-vs-gemini-3-0-pro-which-one-is-best-for-coding
GPT-5.2 Vs Claude Opus 4.5 Vs Gemini 3.0 Pro – Which One Is Best For Coding?
1 week ago - A demo showcasing Claude Opus 4.5’s advanced coding capabilities: The competition extends well beyond a single benchmark. Opus 4.5 delivered a 15% improvement over Sonnet 4.5 on Terminal Bench, demonstrating superior command-line proficiency.