90 pages for /effort.

effort Claude Developer Platform · path build-with-claude/effort choosing-a-model Claude Developer Platform · in the page about-claude/models/choosing-a-model …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort) that trades intelligence for latency and cost within a single model. Tuning effort is often a better lever than switching… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort) is a separate output-level control, not a thinking budget. Before (Claude Mythos Preview): <CodeGroup> ```ba… optimizing-for-cost-and-intelligence Claude Developer Platform · in the page about-claude/models/optimizing-for-cost-and-intelligence …ge to [`effort`](https://platform.claude.com/docs/en/build-with-claude/effort), the thinking configuration, the [`speed`](https://platform.claude.com/docs/en/build-with-claude/fast-mode) setting, the… customer-support-chat Claude Developer Platform · in the page about-claude/use-case-guides/customer-support-chat …atency. [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) is its main control for speed: `low` is the fastest level, suited to chat and short tool tasks. ### Build a strong promp… advisor-tool Claude Developer Platform · in the page agents-and-tools/tool-use/advisor-tool …medium [effort](https://platform.claude.com/docs/en/build-with-claude/effort) with an Opus advisor achieves intelligence comparable to Sonnet at default effort, at lower cost. For maximum intelligenc… errors Claude Developer Platform · in the page api/errors …r `max` [effort](https://platform.claude.com/docs/en/build-with-claude/effort), a request with `between_tools` also returns a 400 `invalid_request_error`. The message says thinking is disabled because… claude-on-amazon-bedrock-legacy Claude Developer Platform · in the page build-with-claude/claude-on-amazon-bedrock-legacy …id-conversation](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta) on Claude Fable 5.1 and Claude Opus 5.5. This is in beta: add `mid-conversation-outpu… claude-platform-on-aws Claude Developer Platform · in the page build-with-claude/claude-platform-on-aws …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort), and, on the models that support it, [extended thinking](https://platform.claude.com/docs/en/build-with-claude/extended-t… compaction-on-demand Claude Developer Platform · in the page build-with-claude/compaction-on-demand …-message effort](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta) level they set isn't carried over either: until a later message sets a level, turns r… compaction-thinking-blocks Claude Developer Platform · in the page build-with-claude/compaction-thinking-blocks …-message effort](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta) level they set isn't carried over either: until a later message sets a level, turns r… extended-thinking Claude Developer Platform · in the page build-with-claude/extended-thinking …upports [effort](https://platform.claude.com/docs/en/build-with-claude/effort), effort shapes the overall response whereas `budget_tokens` sets thinking depth; set both. To tune the budget: * Match… fast-mode Claude Developer Platform · in the page build-with-claude/fast-mode …on="gauge" href="https://platform.claude.com/docs/en/build-with-claude/effort"> Control how many tokens Claude uses when responding with the effort parameter, trading off between response thorough… mid-conversation-effort-example Claude Developer Platform · in the page build-with-claude/mid-conversation-effort-example …umented [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) value such as `xhigh`. There is no hidden level above the ones on that page. This example sets effort at the top level of… mid-conversation-system-messages Claude Developer Platform · in the page build-with-claude/mid-conversation-system-messages …nge the [effort](https://platform.claude.com/docs/en/build-with-claude/effort) level partway through a conversation. This is in beta on Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Opu… overview Claude Developer Platform · in the page build-with-claude/overview …| | [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) | Control how many tokens Claude uses when responding with the `effort` parameter, trading o… preserved-thinking Claude Developer Platform · in the page build-with-claude/preserved-thinking …-message effort](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta), use it instead: append a `role: "system"` message with empty `content` and the new l… Request 2 caches its request content (not the response) Claude Developer Platform · in the page build-with-claude/prompt-caching …_config.effort`](https://platform.claude.com/docs/en/build-with-claude/effort) value always invalidates message blocks, with the same model-specific effect on tool and system caches as thinking parame… claude-prompting-best-practices Claude Developer Platform · in the page build-with-claude/prompt-engineering/claude-prompting-best-practices …owering [effort](https://platform.claude.com/docs/en/build-with-claude/effort) does not reliably change visible response length. Prompt explicitly for conciseness instead. See [Prompting Claude Opus 5… prompting-claude-fable-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5 …higher [effort](https://platform.claude.com/docs/en/build-with-claude/effort) settings, especially when the task requires gathering context, building, and self-verifying, and autonomous runs can exte… Delivering work Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5-1 …default [effort](https://platform.claude.com/docs/en/build-with-claude/effort) level, `high`, then test the other levels (`low`, `medium`, `xhigh`, and `max`) against your own evals. Effort is the pri… prompting-claude-haiku-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-haiku-5-5 …inking [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) is the main control for how much Claude Haiku 5.5 thinks. It replaces the thinking budget (`budget_tokens`) that Claude H… prompting-claude-opus-4-8 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-4-8 …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort) allows you to tune Claude's intelligence versus token spend, trading off capability for faster speed and lower costs. Sta… prompting-claude-opus-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5 …medium` [effort](https://platform.claude.com/docs/en/build-with-claude/effort) produce strong quality at a fraction of the tokens and latency of higher settings. Start with the default (`high`) and ad… prompting-claude-opus-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5-5 …effort [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) is the main control for how much Claude Opus 5.5 thinks, and because thinking is always on, it's the first setting to adj… prompting-claude-sonnet-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-sonnet-5 …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort) allows you to tune Claude's intelligence versus token spend, trading off capability for faster speed and lower costs. On… prompting-claude-sonnet-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-sonnet-5-5 …effort [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) is the main control for how much Claude Sonnet 5.5 thinks, and with it quality, latency, and cost. Its levels are recalib… task-budgets Claude Developer Platform · in the page build-with-claude/task-budgets …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort): effort controls how thoroughly Claude reasons about each step, whereas task budgets cap the total work Claude can do acr… thinking Claude Developer Platform · in the page build-with-claude/thinking …d"}` at [effort](https://platform.claude.com/docs/en/build-with-claude/effort) `high` or below. At `xhigh` or `max` effort, thinking cannot be turned off: requests that combine `thinking: {type: "disa… thinking-steering-and-cost Claude Developer Platform · in the page build-with-claude/thinking-steering-and-cost …is the [effort](https://platform.claude.com/docs/en/build-with-claude/effort) parameter, which acts as soft guidance for how often and how deeply Claude uses thinking; see [Effort levels](https://pla… thinking-troubleshooting Claude Developer Platform · in the page build-with-claude/thinking-troubleshooting …ed"` at [effort](https://platform.claude.com/docs/en/build-with-claude/effort) `high` or below; combining it with effort `xhigh` or `max` returns a 400 error. On Claude Opus 5, this restriction is enf… API usage primer for Claude Claude Developer Platform · in the page claude_api_primer …h the [`effort`](https://platform.claude.com/docs/en/build-with-claude/effort) parameter rather than a token budget. Adaptive thinking is supported on Claude 4.6 and later models and Claude Mythos Pre… apple-foundation-models Claude Developer Platform · in the page cli-sdks-libraries/libraries/apple-foundation-models …e [effort level](https://platform.claude.com/docs/en/build-with-claude/effort) for every request with `fixedEffort:`. It takes precedence over the framework's per-request reasoning hints. The framewor… api-and-data-retention Claude Developer Platform · in the page manage-claude/api-and-data-retention …| | [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `/v1/messages`<br />with `effort` | <Eligibl… agent-setup Claude Developer Platform · in the page managed-agents/agent-setup …[Effort levels](https://platform.claude.com/docs/en/build-with-claude/effort#effort-levels), and [Pin the inference geo](https://platform.claude.com/docs/en/managed-agents/agent-setup#pin-the-inferen… 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 …-message effort](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta). 2. **Change instructions and tools with mid-conversation system messages:** To chan… overview Claude Developer Platform · in the page models/fable-5-1/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Comparative latency… whats-new-fable-5-1 Claude Developer Platform · in the page models/fable-5-1/whats-new-fable-5-1 …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort) to control thinking depth. * **Pricing:** the same as Claude Fable 5, except for a [lower cache read price](https://platf… overview Claude Developer Platform · in the page models/fable-5/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Input → output… overview Claude Developer Platform · in the page models/haiku-4-5/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | Not supported | | Input → output… migration-guide Claude Developer Platform · in the page models/haiku-5-5/migration-guide …and use [effort](https://platform.claude.com/docs/en/build-with-claude/effort) as the control: where Claude Haiku 4.5 ran without thinking, or with a small budget to save tokens, choose a lower effort… overview Claude Developer Platform · in the page models/haiku-5-5/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `medium` | | Comparative latency… whats-new-haiku-5-5 Claude Developer Platform · in the page models/haiku-5-5/whats-new-haiku-5-5 …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort). ### Larger context window and output Claude Haiku 5.5 has a 1M token [context window](https://platform.claude.com/docs… overview Claude Developer Platform · in the page models/mythos-5-1/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Comparative latency… overview Claude Developer Platform · in the page models/mythos-5/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Input → output… overview Claude Developer Platform · in the page models/opus-4-5/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Input → output… overview Claude Developer Platform · in the page models/opus-4-6/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Input → output… overview Claude Developer Platform · in the page models/opus-4-7/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Input → output… overview Claude Developer Platform · in the page models/opus-4-8/overview …[Default effort](https://platform.claude.com/docs/en/build-with-claude/effort) | `high` | | Input → output… migration-guide Claude Developer Platform · in the page models/opus-5-5/migration-guide …ffort parameter](https://platform.claude.com/docs/en/build-with-claude/effort), the only request parameter that controls it. All five levels (`low`, `medium`, `high`, `xhigh`, `max`) are supported, an…