September 29, 2025 - Teams can explore and validate ... known for. Sonnet 4.5 represents a new generation of coding models. It's surprisingly efficient at maximizing actions per context window through parallel tool execution, for example running multiple bash commands at once....

September 29, 2025 - With our latest model, Claude Sonnet 4.5, these capabilities enable developers to build AI agents capable of handling long-running tasks at higher performance and without hitting context limits or losing critical information. As production agents handle more complex tasks and generate more tool results, they often exhaust their effective context windows—leaving developers stuck choosing between cutting agent transcripts or degrading performance.

3 weeks ago - Advanced context management: Sonnet 4.5 maintains exceptional state tracking in external files, preserving goal-orientation across sessions. 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.

September 29, 2025 - Sonnet 4.5 features in the Amazon Bedrock API Here are some highlights of Sonnet 4.5 in the Amazon Bedrock API: Smart Context Window Management – The new API introduces intelligent handling when AI models reach their maximum capacity.

3 weeks ago - When your conversation approaches the context window limit, Claude summarizes earlier messages to make room for new content. This does not count towards your usage limit, and allows conversations to continue indefinitely in most cases.

September 29, 2025 - Claude Sonnet 4.5 and Claude Haiku 4.5 feature context awareness, enabling these models to track their remaining context window (i.e. “token budget”) throughout a conversation.

September 29, 2025 - Claude Sonnet 4.5 by Anthropic is now available in Cline. With a 200k context window at the same $3/$15 pricing as Sonnet 4, this update doubles down on reliability, terseness, and stateful project memory — and Cline is the ideal environment to unlock it.

September 29, 2025 - Through the Amazon Bedrock API, Claude can now automatically edit context to clear stale information from past tool calls, allowing you to maximize the model’s context. A new memory tool lets Claude store and consult information outside the context window to boost accuracy and performance. Claude Sonnet 4.5 is now available in Amazon Bedrock via global cross region inference in multiple locations.

1 month ago - However, Sonnet 4.5 uniquely provides access to special long-context modes — including 1,000,000-token sessions — which make it exceptionally suitable for large document ingestion, multi-file libraries, compliance datasets and entire book-length analysis. Opus 4.5 focuses on higher reasoning quality within its large context rather than maximum window expansion, prioritizing structured logic, better dependencies across segments and superior performance under cognitive load.

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.

September 29, 2025 - 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.

November 20, 2025 - Claude building a stock trading app based on a simple prompt. ‎Under the hood, Sonnet 4.5 offers a 200K-token context window, with access to a 1M-token window for certain high-volume use cases.

August 12, 2025 - The context window has been increased from 200,000 to 1 million tokens, representing a 5x expansion. This enhancement allows Claude to process and reason over much larger amounts of text in a single request, opening up new possibilities for comprehensive analysis and generation tasks.

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 ...

August 12, 2025 - Today, Anthropic is releasing a version of Claude Sonnet 4 that has a 1-million token context window.

September 29, 2025 - Sonnet 4.5 is efficient at maximizing actions per context window through parallel tool execution -running multiple bash commands at once, reading several files simultaneously, that sort of thing.

August 22, 2025 - The feature, now in public beta, is accessible through the Anthropic API and Amazon Bedrock, with Google Cloud’s Vertex AI support expected soon. The extended context window enables users to submit far larger datasets within a single request.