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.

June 10, 2025 - Claude 4 Opus: 200K context, 32K max output, $15 per million input tokens, $75 for output · Claude 4 Sonnet: 200K context, 64K max output, $3 per million input tokens, $15 for output · These are the same prices as the previous generation. Usually, we expect prices to drop or context windows to increase with each release—but not this time.

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.

August 12, 2025 - With the 1M context window, developers can now work on significantly larger projects while maintaining the high accuracy we need for real-world coding," said Eric Simons, CEO and Co-founder of Bolt.new.

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.

September 23, 2025 - Context Window (200K tokens): Both models can read and understand massive amounts of text—like the length of an entire book or large codebases—making them ideal for enterprise-level tasks.

2 weeks ago - For developers working on large-scale projects or agent-based systems, GPT-4 Turbo (via API) unlocks even more: a 1 million-token context window and better support for autonomous workflows, though it’s not fully available inside the standard ...

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 ...

May 23, 2025 - But with a 200k context window, you can feed it hundreds of pages of PDFs, documentation, or code, and it won’t blink. Claude 4 comes in two variations: Claude Sonnet and Claude Opus.

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.

May 23, 2025 - It’s built for tasks that require ... problem solving, and extended research workflows. Like Sonnet 4, it supports a 200K context window, so this can be a disadvantage if you want to use it with a large codebase...

While using the free Claude plan, the context window and usage limit can vary depending on current demand.

May 22, 2025 - This next generation of Claude models represents a significant leap forward in agentic AI capabilities, transforming how businesses can deploy AI for both specialized complex tasks and everyday high-volume operations. Rather than simply generating content, Claude 4.5 models function more like expert virtual collaborators—maintaining focus across complex tasks, preserving relevant context, and delivering complete solutions without constant guidance.

Today we're releasing Claude Opus 4.1, an upgrade to Claude Opus 4 on agentic tasks, real-world coding, and reasoning.

August 13, 2025 - Anthropic’s latest update brings a massive one-million-token context window to Claude Sonnet 4 (not to be confused with Claude Opus 4). That’s a fivefold jump from its previous limit of 200K tokens…

November 11, 2025 - Context window in Claude Code determines conversation memory capacity. Manage effectively with strategic chunking and avoid depletion for optimal performance.

May 15, 2025 - An LLM app is any application with a built-in feature(s) utilizing advanced AI models, (EG: Claude) that have been trained on huge amounts of data. An app description like that suggests they have wide-reaching applications across industries, and it does… · The ability for these apps to understand and generate human like text has seen them deployed for: ... The list goes on but a key feature to LLM apps is their context window - the most amount of text the model can use and consider when generating responses.

Talk with Claude, an AI assistant from Anthropic

1 - Claude Sonnet 4 supports a 1M token context window when using the context-1m-2025-08-07 beta header. Long context pricing applies to requests exceeding 200K tokens.2 - Reliable knowledge cutoff indicates the date through which a model’s ...