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.
Anthropic
anthropic.com › claude › sonnet
Claude Sonnet 4.5
September 29, 2025 - Sonnet 4 improves on Sonnet 3.7 across a variety of areas, especially coding. It offers frontier performance that’s practical for most AI use cases, including user-facing AI assistants and high-volume tasks. ... Sonnet 3.7 is the first hybrid reasoning model and our most intelligent model to date. It’s state-of-the art for coding and delivers significant improvements in content generation, data analysis, and planning. ... Anyone can chat with Claude using Sonnet 4.5 on Claude.ai, available on web, iOS, and Android.
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, 2025Videos
19:14
Claude 4 Is Finally Here - And I Pushed It to the Limit - YouTube
19:47
Coding with Claude 4 is actually insane - YouTube
07:35
Claude Sonnet 4 is AWESOME - YouTube
13:03
Claude 4 is not what you think... - YouTube
11:13
Claude Sonnet 4.5 - The New Coding King? (Sonnet 4.5 vs. GPT 5 ...
33:17
Sonnet 4.5 is the best coding model in the world - YouTube
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)
Claude
claude.ai
Claude
Talk with Claude, an AI assistant from Anthropic
Wikipedia
en.wikipedia.org › wiki › Claude_(language_model)
Claude (language model) - Wikipedia
2 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".
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
1 day ago - In the rapidly evolving landscape of artificial intelligence, Anthropic's recent upgrades to its AI model, referred to as Claudius in their announcement, mark a significant advancement in generative AI capabilities. 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.
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
1 day ago - No, there is no dedicated Claude Sonnet 4.5 subscription plan.
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
We're gonna start here. Alright. So, like I said, Claude had their first ever or sorry, Anthropic had their first ever developers conference, this past Thursday. And there, they announced among other things, their two new flagship models in Claude for Opus and Claude for SONNET.
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
3 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 - On the GenAI Platform, and in the wider LLM user community in general, their flagship model Sonnet 3.7 has been one of the most popular and powerful models anywhere, and for very good reason. Recently, Anthropic released their most powerful models yet: the Claude 4 family of LLMs.
CometAPI
cometapi.com › what-is-claude-sonnet-4-how-to-access-it
What is Claude Sonnet 4? How to Access it? - CometAPI - All AI Models in One API
May 26, 2025 - In May 2025, Anthropic unveiled Claude Sonnet 4 alongside its sibling model Claude Opus 4, marking a major milestone in the evolution of the Claude family of large language models. Building on the strengths of its predecessor, Claude Sonnet 3.7, Sonnet 4 introduces a suite of enhancements targeting reasoning depth, coding proficiency, and seamless tool integration.
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
The Neuron
theneuron.ai › explainer-articles › everything-to-know-about-claude-4-sonnet-4-opus-4-from-the-good-to-the-bad-and-the-mid
Everything to know about Claude 4 (Sonnet 4, Opus 4), from the Good, to the Bad, and the REAL weird... | The Neuron
May 26, 2025 - Anthropic says Opus 4 is capable of sustained performance on complex, long-haul tasks, while claiming that Sonnet 4 offers a significant upgrade in coding and reasoning precision over its predecessor, Sonnet 3.7, that's more precise when following your instructions. But when we dug into the massive amount of documentation Anthropic released—including a 120-page safety report, a 25-page security document, and their best practices documentation for working with Claude 4—we found a fascinating, complex, and sometimes bizarre picture of these new AI systems.
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.
DEV Community
dev.to › nodeshiftcloud › claude-4-opus-vs-sonnet-benchmarks-and-dev-workflow-with-claude-code-11fa
Claude 4: Opus vs Sonnet, Benchmarks, and Dev Workflow with Claude Code - DEV Community
May 24, 2025 - Claude Sonnet 4, meanwhile, offers a well-balanced upgrade from 3.7, achieving a standout 72.7% SWE-bench score and offering sharper reasoning, better code navigation, and more accurate responses across coding scenarios.
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 - Claude Opus 4 is now available ... AI agents that can handle complex, multistep workflows across software development and enterprise operations. Claude Sonnet 4, which is optimized for high-volume production workloads is coming soon....
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
Helicone
helicone.ai › blog › claude-opus-and-sonnet-4-full-developer-guide
Claude Opus 4 and Sonnet 4 Technical Review: The Best Coding Models for Developers?
May 23, 2025 - Anthropic just dropped Claude 4 with two new models: Opus 4 and Sonnet 4. Both feature enhanced hybrid reasoning and claim to be the world's best coding models. We dive deep into their capabilities, benchmarks, and what Anthropic's developer-first ...
Snowflake
snowflake.com › en › engineering-blog › claude-opus-sonnet-4-snowflake-cortex-ai
Announcing Claude Opus 4 and Claude Sonnet 4 on Snowflake Cortex AI
Claude Opus 4 and Sonnet 4 are now on Snowflake Cortex AI, enabling secure access to Anthropic’s latest models via LLM functions and REST APIs.