101 pages for /context.

context-editing Claude Developer Platform · path build-with-claude/context-editing context-windows Claude Developer Platform · path build-with-claude/context-windows glossary Claude Developer Platform · in the page about-claude/glossary …context windows](https://platform.claude.com/docs/en/build-with-claude/context-windows) to learn more. ## Fine-tuning Fine-tuning is the process of further training a pretrained language model using… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) by default, and up to 128k output tokens per request. * **Pricing:** $10 USD per million input tokens and $50 US… optimizing-for-cost-and-intelligence Claude Developer Platform · in the page about-claude/models/optimizing-for-cost-and-intelligence …Context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) clears stale tool results, and [automatic compaction](https://platform.claude.com/docs/en/build-with-claude/comp… pricing Claude Developer Platform · in the page about-claude/pricing …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) at standard pricing. (A 900k-token request is billed at the same per-token rate as a 9k-token request.) Prompt c… PDF Processing Claude Developer Platform · in the page agents-and-tools/agent-skills/best-practices …[context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) is a public good. Your Skill shares the context window with everything else Claude needs, including: * The syst… advisor-tool Claude Developer Platform · in the page agents-and-tools/tool-use/advisor-tool …clear_thinking`](https://platform.claude.com/docs/en/build-with-claude/context-editing) with a `keep` value other than `"all"` shifts the advisor's quoted transcript each turn, causing advisor-side ca… computer-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/computer-use-tool …result clearing](https://platform.claude.com/docs/en/build-with-claude/context-editing#tool-result-clearing) to drop old ones from the context. If you must prune, keep [`prefix_mismatch_behavior: "dro… fine-grained-tool-streaming Claude Developer Platform · in the page agents-and-tools/tool-use/fine-grained-tool-streaming …on="stack" href="https://platform.claude.com/docs/en/build-with-claude/context-windows"> Understand how the context window works, how extended thinking and tool use count toward it, and how to man… manage-tool-context Claude Developer Platform · in the page agents-and-tools/tool-use/manage-tool-context …Context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) | ### Tool search Tool search keeps tool definitions out of the context wind… memory-tool Claude Developer Platform · in the page agents-and-tools/tool-use/memory-tool …Context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing). ## Using with compaction The memory tool can also be paired with [compaction](https://platform.claude.com/doc… Log at info level Claude Developer Platform · in the page agents-and-tools/tool-use/tool-runner …tic [compaction](https://platform.claude.com/docs/en/build-with-claude/context-editing#client-side-compaction-sdk), which generates summaries when token usage exceeds a threshold so the conversation c… beta-headers Claude Developer Platform · in the page api/beta-headers …context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) beta. The SDK takes beta names through `betas` (csharp, go: `Betas`; java: `.addBeta()`) and sends the `anthropi… claude-in-microsoft-foundry Claude Developer Platform · in the page build-with-claude/claude-in-microsoft-foundry …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows), while managing costs through your Azure subscription. Claude is available in Global Standard and US Data Zone… claude-on-amazon-bedrock-legacy Claude Developer Platform · in the page build-with-claude/claude-on-amazon-bedrock-legacy …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) on Amazon Bedrock. Other Claude models, including Sonnet 4.5 (deprecated) and Sonnet 4 (deprecated), have a 200k… claude-on-vertex-ai Claude Developer Platform · in the page build-with-claude/claude-on-vertex-ai …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) for these models: * Claude Fable 5.1 * Claude Fable 5 * Claude Opus 5.5 * Claude Opus 5 * Claude Opus 4.8 * Cla… claude-platform-on-aws Claude Developer Platform · in the page build-with-claude/claude-platform-on-aws …Context windows](https://platform.claude.com/docs/en/build-with-claude/context-windows) for per-model limits. ## Feature support Claude Platform on AWS uses Claude API endpoints directly, which mean… sent_count = len(messages sent in the compaction request) Claude Developer Platform · in the page build-with-claude/compaction …con="edit" href="https://platform.claude.com/docs/en/build-with-claude/context-editing"> Automatically manage conversation context as it grows with context editing. </Card> <Card title="Conte… compaction-on-demand Claude Developer Platform · in the page build-with-claude/compaction-on-demand …[context window](https://platform.claude.com/docs/en/build-with-claude/context-windows). ## Write your own summarization prompt Without `instructions`, the API uses its own summarization prompt. A n… compaction-threshold Claude Developer Platform · in the page build-with-claude/compaction-threshold …con="edit" href="https://platform.claude.com/docs/en/build-with-claude/context-editing"> Automatically manage conversation context as it grows with context editing. </Card> <Card title="Conte… overview Claude Developer Platform · in the page build-with-claude/overview …Context windows](https://platform.claude.com/docs/en/build-with-claude/context-windows) | Up to 1M tokens for processing large documents, extensive code bases, and long conversations.… preserved-thinking Claude Developer Platform · in the page build-with-claude/preserved-thinking …Context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) clears old tool results or old thinking blocks by rule, oldest first. The strategies are `clear_tool_uses_202509… claude-prompting-best-practices Claude Developer Platform · in the page build-with-claude/prompt-engineering/claude-prompting-best-practices …ntext awareness](https://platform.claude.com/docs/en/build-with-claude/context-windows#context-awareness), which lets the model track its remaining context window (that is, its "token budget") through… Delivering work Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5-1 …context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) do any trimming. If you compact on the client, the simplest shape is to replace the whole history with one summa… prompting-claude-opus-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5 …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) as both the default and the maximum, and its instruction following, tool calling, and reasoning stay consistent… thinking Claude Developer Platform · in the page build-with-claude/thinking …diting strategy](https://platform.claude.com/docs/en/build-with-claude/context-editing#thinking-block-clearing). Within the latest assistant message, the sequence of consecutive `thinking` blocks mus… thinking-troubleshooting Claude Developer Platform · in the page build-with-claude/thinking-troubleshooting …context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) never trigger it. To fix it, keep the history append-only: pass earlier turns back exactly as sent and received… token-counting Claude Developer Platform · in the page build-with-claude/token-counting …-maximize" href="https://platform.claude.com/docs/en/build-with-claude/context-windows"> Use token counts to keep prompts within a model's context window. </Card> <Card title="Rate limits" ic… java Claude Developer Platform · in the page cli-sdks-libraries/sdks/java …context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing): ```java import com.anthropic.models.beta.AnthropicBeta; import com.anthropic.models.beta.messages.BetaMessage;… For Amazon Bedrock support Claude Developer Platform · in the page cli-sdks-libraries/sdks/python …context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing): ```python client = Anthropic() response = client.beta.messages.create( model="claude-opus-5-5", max_t… typescript Claude Developer Platform · in the page cli-sdks-libraries/sdks/typescript …context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing): ```typescript const client = new Anthropic(); const response = await client.beta.messages.create({ model: "c… api-and-data-retention Claude Developer Platform · in the page manage-claude/api-and-data-retention …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | `/v1/messages` | <Eligible>Yes</Eligible>… Or, for Claude Mythos 5.1, which offers the same capabilities to verified organizations: Claude Developer Platform · in the page models/fable-5-1/migration-guide …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) by default, and up to 128k output tokens per request. * **Pricing:** $10 USD per million input tokens and $50 US… overview Claude Developer Platform · in the page models/fable-5-1/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… whats-new-fable-5-1 Claude Developer Platform · in the page models/fable-5-1/whats-new-fable-5-1 …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) (default and maximum) at standard per-token pricing across the whole window, and 128k max output tokens. * **Thi… overview Claude Developer Platform · in the page models/fable-5/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… overview Claude Developer Platform · in the page models/haiku-4-5/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 200K tokens | | Max output… migration-guide Claude Developer Platform · in the page models/haiku-5-5/migration-guide …block clearing](https://platform.claude.com/docs/en/build-with-claude/context-editing#thinking-block-clearing). See [Thinking block preservation by model](https://platform.claude.com/docs/en/build-wi… overview Claude Developer Platform · in the page models/haiku-5-5/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… whats-new-haiku-5-5 Claude Developer Platform · in the page models/haiku-5-5/whats-new-haiku-5-5 …block clearing](https://platform.claude.com/docs/en/build-with-claude/context-editing#thinking-block-clearing). | | [Shorter prompts can be cached](https://platform.cla… overview Claude Developer Platform · in the page models/mythos-5-1/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… overview Claude Developer Platform · in the page models/mythos-5/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… overview Claude Developer Platform · in the page models/opus-4-5/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 200K tokens | | Max output… overview Claude Developer Platform · in the page models/opus-4-6/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… overview Claude Developer Platform · in the page models/opus-4-7/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… overview Claude Developer Platform · in the page models/opus-4-8/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… migration-guide Claude Developer Platform · in the page models/opus-5-5/migration-guide …context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) is the default, and a header sent for older models has no effect. The following request satisfies every item in… overview Claude Developer Platform · in the page models/opus-5-5/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output… overview Claude Developer Platform · in the page models/opus-5/overview …[Context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) | 1M tokens | | Max output…