Anthropic
anthropic.com › news › claude-3-family
Introducing the next generation of Claude
We’re particularly excited to provide this new modality to our enterprise customers, some of whom have up to 50% of their knowledge bases encoded in various formats such as PDFs, flowcharts, or presentation slides. Previous Claude models often made unnecessary refusals that suggested a lack of contextual understanding. We’ve made meaningful progress in this area: Opus, Sonnet, and Haiku are significantly less likely to refuse to answer prompts that border on the system’s guardrails than previous generations of models. As shown below, the Claude 3 models show a more nuanced understanding of requests, recognize real harm, and refuse to answer harmless prompts much less often.
Anthropic
www-cdn.anthropic.com › de8ba9b01c9ab7cbabf5c33b80b7bbc618857627 › Model_Card_Claude_3.pdf pdf
The Claude 3 Model Family: Opus, Sonnet, Haiku Anthropic Abstract
of the largest model (Opus) in the Claude 3 family, with a 200k context window.
Videos
15:54
Claude Code: 3 Unlocks to Level 20 - YouTube
13:03
Claude Code Tutorial #3 - Context - YouTube
11:31
Claude Just 5x'd Its Context Window - YouTube
11:47
Why I DON'T like Claude 3 Opus + GPT-4o comparison - YouTube
Varun Mayya | Claude 3 opus is so good at writing, esp the ...
42:21
Prompt Engineering with the Anthropic Claude 3 Opus API : Part ...
Does TextCortex offer Text Generation API?
Yes, we have a Text Generation API, please talk to us directly to implement it. You can reach out to us at [email protected]
textcortex.com
textcortex.com › home › blog posts › claude 3 review (opus, haiku, sonnet)
Claude 3 Review (Opus, Haiku, Sonnet)
What's the difference between TextCortex, Microsoft Copilot & ChatGPT?
TextCortex is a customizable platform that sets itself apart from Microsoft Copilot and ChatGPT by allowing businesses to tailor AI for specific use cases, automate workflows, and receive detailed, personalized responses. It integrates seamlessly with many tools, such as the Microsoft Suite, and features precise information retrieval with collaborative knowledge management on a GDPR-compliant EU infrastructure. Access to leading AI models, including the GPT models, guarantees exceptional capabilities while offering the flexibility to choose among multiple providers. With multilingual support a
textcortex.com
textcortex.com › home › blog posts › claude 3 review (opus, haiku, sonnet)
Claude 3 Review (Opus, Haiku, Sonnet)
How does TextCortex work?
TextCortex is a robust enterprise-ready business software designed for companies aiming to integrate AI with their own data and knowledge. It provides advanced features for managing the lifecycle of knowledge and content, catering specifically to business needs such as content creation, data analysis and knowledge management.
textcortex.com
textcortex.com › home › blog posts › claude 3 review (opus, haiku, sonnet)
Claude 3 Review (Opus, Haiku, Sonnet)
Factsheet
Developer Anthropic
Initial release March 2023; 2 years ago (2023-03)
Stable release Claude Opus 4.5 /
November 24, 2025; 32 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; 32 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; 32 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; 32 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)
Wikipedia
en.wikipedia.org › wiki › Claude_(language_model)
Claude (language model) - Wikipedia
1 week ago - Claude 3 was released on March ... three models in ascending order of capability: Haiku, Sonnet, and Opus. The default version of Claude 3, Opus, has a context window of 200,000 tokens, but this could be expanded to 1 million for specific use cases....
Artificial Analysis
artificialanalysis.ai › models › claude-3-opus
Claude 3 Opus - Intelligence, Performance & Price Analysis
Analysis of Anthropic's Claude 3 Opus and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more.
Reddit
reddit.com › r/singularity › claude 3 context window is a big deal
r/singularity on Reddit: Claude 3 context window is a big deal
March 4, 2024 -
I use AI a lot in cases where I need a bit more than 16k input length (GPT3.5's context window limit). GPT3.5's performance is normally fine for me, but I have to use GPT4 to get a longer context window, at a much increased inference price for the many queries I end up racking up over a long session.
The Claude 3 family of models are the first ones that seem to have very respectable performance and have longer (200k) context windows across the entire family (Opus + Sonnet + Haiku). So I'm very excited about the 'Sonnet' model (the middle quality model).
TLDR: It's exciting to see the benchmark results of Opus, but I think Sonnet might enable more new real world use cases than Opus, when considering the context window and the relatively low cost.
Top answer 1 of 5
8
Context length is one thing, but the LLMs differ greatly by attention distribution. Many suffer from the needle in the haystack problem, ie. how well can they recall from the middle of a long prompt input. Let's see how Claude 3 handles this, 2.1 was already pretty good at it. https://www.anthropic.com/news/claude-2-1-prompting
2 of 5
4
Yup, I just busted through a huge stack of notes that I couldn't easily get to proc in gpt4. Hot and this is amazing. This all just goes to show you how fast this shi shi can move.
Phospho
blog.phospho.ai › claude-3-opus-context-window
Claude 3 Opus Context Window: How to use it
May 15, 2025 - Learn how Claude 3 Opus's context window revolutionizes LLM applications, providing more accurate responses and deeper context retention.
TextCortex
textcortex.com › home › blog posts › claude 3 review (opus, haiku, sonnet)
Claude 3 Review (Opus, Haiku, Sonnet)
For example, the Claude 3 Opus model has a context window of up to 1 million tokens (roughly 750,000 words), while the Claude 3 Sonnet model has a context window of 200K tokens (roughly 150,000 words).
Poe
poe.com › Claude-Opus-3
Claude-Opus-3 - Poe
Explore GPT-5, Claude-Sonnet-4.5, ... appDownload Android appDownload Windows app ... Anthropic's Claude Opus 3 can handle complex analysis, longer tasks with multiple steps, and higher-order math and coding tasks. Supports 200k tokens of context (approximately 150k English ...
Anthropic
docs.anthropic.com › claude › docs › models-overview
Models overview - Claude Docs
3 - Claude Sonnet 4.5 supports a 1M token context window when using the context-1m-2025-08-07 beta header.
Swiftask
swiftask.ai › ai › claude3opus
How to Use Claude 3 Opus on Swiftask?
Content creation: generates high-quality written content, taking into account a broad context of information. 1. Click the "Get Started" button below to access the platform. 2. When on the home interface of Claude 3 Opus, locate the chat bar at the bottom and start writing your prompts.
LLM Stats
llm-stats.com › home › models › claude 3 opus
Claude 3 Opus: Pricing, Context Window, Benchmarks, and More
February 29, 2024 - API access for Claude 3 Opus will be available soon through our gateway.
Claude
support.claude.com › en › articles › 7996848-how-large-is-claude-s-context-window
How large is Claude’s context window? | Claude Help Center
While using the free Claude plan, the context window and usage limit can vary depending on current demand. Refer to this article about free Claude usage for more information: About Free Claude Usage
ClaudeLog
claudelog.com › home › faqs › what is context window
What is Context Window in Claude Code | ClaudeLog
The context window is Claude's memory capacity for a single conversation. It includes your messages, Claude's responses, file contents, and tool outputs. Most Claude models have a 200K token context window, but Claude Sonnet 4.5 via API offers ...
Anthropic
anthropic.com › news › claude-opus-4-5
Introducing Claude Opus 4.5
They were run on an earlier snapshot of Claude Opus 4.5. Evaluations of the final production model show a very similar pattern of results when compared to other Claude models, and are described in detail in the Claude Opus 4.5 system card. 4: A fetch-enabled version of BrowseComp-Plus. Specifically, the improvement was from 70.48% without using the combination of techniques to 85.30% using it. ... All evals were run with a 64K thinking budget, interleaved scratchpads, 200K context window, default effort (high), default sampling settings (temperature, top_p), and averaged over 5 independent trials.
Amazon Web Services
aws.amazon.com › generative ai › amazon bedrock › anthropic
Claude by Anthropic - Models in Amazon Bedrock – AWS
1 week ago - By default, Anthropic's Claude models have a 200,000 token context window enabling you to relay a large volume of information to Claude. This translates to roughly 150,000 words, or over 500 pages of material. Sonnet 4 and 4.5 now offers an expanded context length of 1 million tokens (preview).
Medium
medium.com › version-1 › analysis-of-anthropics-claude-3-sonnet-on-amazon-bedrock-21a504b20148
Analysis of Anthropic’s Claude 3 Sonnet on Amazon Bedrock | by Vaishnavi R | Version 1 | Medium
September 23, 2024 - The Claude 3 models all have a context window size of 200k, which is about 150k words. However, the Claude Sonnet model, despite having this large context window, has a maximum output length limit of only 4096 tokens.
Encord
encord.com › blog › claude-3-explained
Claude 3 | AI Model Suite: Introducing Opus, Sonnet, and Haiku
March 18, 2024 - However, this high intelligence comes at a higher cost of $15 per million input tokens and $75 per million output tokens. The context window for Opus is 200K tokens, and it is suitable for tasks such as task automation, research and development, ...
Claude Docs
platform.claude.com › docs › en › about-claude › models › whats-new-claude-4-5
What's new in Claude 4.5 - Claude Docs
Combined with more effective context window usage and our new context management API features, the model optimally handles information across extended sessions to maintain coherence over time. Context awareness is available in Claude Sonnet 4, Sonnet 4.5, Haiku 4.5, Opus 4, Opus 4.1, and Opus 4.5.
DataCamp
datacamp.com › tutorial › getting-started-with-claude-3-and-the-claude-3-api
Getting Started with Claude 3 and the Claude 3 API | DataCamp
March 13, 2024 - They offer a 200K context window but can process inputs exceeding 1 million tokens. Specifically, Claude 3 Opus achieved near-perfect recall, surpassing 99% accuracy.