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.
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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
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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.
TextCortex
textcortex.com › home › blog posts › claude 3 review (opus, haiku, sonnet)
Claude 3 Review (Opus, Haiku, Sonnet)
March 6, 2024 - 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).
Claude 4 and still 200k context size
Used up my message rate limit in one message. I had it review my documents and advise on any "modern updates" it could do to my html. It then tried to one-shot everything, using up my limits, AND because it messed up in the middle of the message I lost everything it tried to give me. So next time I'll be very, very specific. More on reddit.com
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May 22, 2025Perplexity limits the Claude 3 Opus Context window to 30k tokens : perplexity_ai
I've tested it a few times, and when using Claude 3 Opus through perplexity, it absolutely limits the context length from 200k to \~30k. On a... More on old.reddit.com
Perplexity limits the Claude 3 Opus Context window to 30k tokens
Did you use Writing focus, Pro Search toggle off? Because I was able to push the limits on over 150k tokens. More on reddit.com
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March 22, 2024Claude 3 context window is a big deal
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 More on reddit.com
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March 4, 2024Does 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]
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textcortex.com › home › blog posts › claude 3 review (opus, haiku, sonnet)
Claude 3 Review (Opus, Haiku, Sonnet)
Which languages does TextCortex support?
TextCortex supports more than 25 languages including English, Dutch, German, Ukranian, Romanian, Spanish, Portuguese, French, Italian.
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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
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textcortex.com › home › blog posts › claude 3 review (opus, haiku, sonnet)
Claude 3 Review (Opus, Haiku, Sonnet)
Videos
11:31
Claude Just 5x'd Its Context Window - YouTube
03:52
New SONNET 4 Update: FINALLY Claude Has 1 MIL CONTEXT WINDOW - YouTube
02:12:45
Claude Code Opus Plan Mode // 1M Context // Testing ++ - YouTube
15:54
Claude Code: 3 Unlocks to Level 20 - YouTube
13:03
Claude Code Tutorial #3 - Context - YouTube
08:53
Cursor, Droid, Claude: Why Your Agent Forgets Rules - YouTube
LLM Stats
llm-stats.com › home › models › claude opus 4
Claude Opus 4: Pricing, Context Window, Benchmarks, and More
May 22, 2025 - Claude Opus 4 is Anthropic's most powerful model and the world's best coding model, part of the Claude 4 family. It delivers sustained performance on complex, long-running tasks and agent workflows.
Vellum
vellum.ai › blog › claude-3-opus-vs-gpt4-task-specific-analysis
Claude 3 Opus vs GPT-4: Task Specific Analysis
October 15, 2024 - In addition to that, Claude Opus supports a larger context window of 200k, compared to GPT-4.
Reddit
reddit.com › r/claudeai › claude 4 and still 200k context size
r/ClaudeAI on Reddit: Claude 4 and still 200k context size
May 22, 2025 -
I like Claude 3.7 a lot, but context size was the only downsize. Well, looks like we need to wait one more year for 1M context model.
Even 400K will be a massive improvement! Why 200k?
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Used up my message rate limit in one message. I had it review my documents and advise on any "modern updates" it could do to my html. It then tried to one-shot everything, using up my limits, AND because it messed up in the middle of the message I lost everything it tried to give me. So next time I'll be very, very specific.
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Still too computationally expensive it seems, DeepMind has a huge advantage with their TPUs when it comes to that. Same with Opus' output limit probably. A bit weird that the knowledge cutoff is March in the API but this in the new system message: Claude's reliable knowledge cutoff date - the date past which it cannot answer questions reliably - is the end of January 2025. Also tracks more with my earlier tests, end of January.
The New Stack
thenewstack.io › home › anthropic’s claude sonnet 4 model gets a 1m token context window
Anthropic's Claude Sonnet 4 Model Gets a 1M Token Context Window - The New Stack
August 12, 2025 - Anthropic today updated its Claude Sonnet 4 model to support a context window of up to 1 million tokens. ... Anthropic today announced that its Claude Sonnet 4 model, the company’s mainstream model that sits below its flagship Claude Opus ...
Wikipedia
en.wikipedia.org › wiki › Claude_(language_model)
Claude (language model) - Wikipedia
4 days ago - Claude 3 was released on March ... 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....
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.
BleepingComputer
bleepingcomputer.com › home › news › artificial intelligence › claude 4 benchmarks show improvements, but context is still 200k
Claude 4 benchmarks show improvements, but context is still 200K
May 22, 2025 - Today, OpenAI rival Anthropic announced Claude 4 models, which are significantly better than Claude 3 in benchmarks, but we're left disappointed with the same 200,000 context window limit.
ClaudeLog
claudelog.com › home › faqs › what is context window
What is Context Window in Claude Code | ClaudeLog
November 11, 2025 - 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 ...
Blockchain Council
blockchain-council.org › home › info › claude 3 opus context window
Claude 3 Opus Context Window - Blockchain Council
August 23, 2024 - This feature allows the model to excel in tasks requiring a deep understanding of context over long stretches of text. It makes the model an invaluable tool for various applications, from content creation to legal analysis.
Anthropic
anthropic.com › news › claude-3-family
Introducing the next generation of Claude
In addition to producing more trustworthy responses, we will soon enable citations in our Claude 3 models so they can point to precise sentences in reference material to verify their answers. The Claude 3 family of models will initially offer a 200K context window upon launch.
Anthropic
anthropic.com › claude › opus
Claude Opus 4.5
Hybrid reasoning model that pushes the frontier for coding and AI agents, featuring a 200K context window ... Claude Opus 4.5 is our most intelligent model to date. It sets a new standard across coding, agents, computer use, and enterprise workflows.
Anthropic
anthropic.com › news › claude-opus-4-5
Introducing Claude Opus 4.5
November 24, 2025 - They were run on an earlier snapshot ... 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 ...
Anthropic
anthropic.com › news › claude-4
Introducing Claude 4
Claude Opus 4 and Sonnet 4 are hybrid models offering two modes: near-instant responses and extended thinking for deeper reasoning. The Pro, Max, Team, and Enterprise Claude plans include both models and extended thinking, with Sonnet 4 also available to free users.
Claude Docs
platform.claude.com › docs › en › about-claude › models › overview
Models overview - Claude Docs
OverviewPrompt generatorUse prompt templatesPrompt improverBe clear and directUse examples (multishot prompting)Let Claude think (CoT)Use XML tagsGive Claude a role (system prompts)Prefill Claude's responseChain complex promptsLong context tipsExtended thinking tips
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).
LessWrong
lesswrong.com › posts › HtdrtF5kcpLtWe5dW › claude-opus-4-5-is-the-best-model-available
Claude Opus 4.5 Is The Best Model Available
3 weeks ago - Michael Trazzi: Claude Opus 4.5 feels alive in a way no model has before. We don’t need superintelligence to make progress on alignment, medicine, or anything else humanity cares about. This race needs to stop. The ability to have longer conversations is to many a big practical upgrade. Knud Berthelsen: Clearly better model, but the fact that Claude no longer ends conversations after filling the context window on its own has been a more important improvement.
Prompthub
prompthub.us › models › claude-opus-4
Claude Opus 4 Model Card
May 22, 2025 - Claude Opus 4 supports a context window of up to 200,000 tokens.