## Compatibility
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22title: Effort
33url: https://platform.claude.com/docs/en/build-with-claude/effort
44description: Control how many tokens Claude uses when responding with the effort parameter, trading off between response thoroughness and token efficiency.
5featureMetadata:
6 status: ga
7 zdr:
8 eligibility: eligible
9 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements).
10 supportedModels:
11 - claude-fable-5-1
12 - claude-mythos-5-1
13 - claude-fable-5
14 - claude-mythos-5
15 - claude-mythos-preview
16 - claude-opus-5
17 - claude-opus-4-8
18 - claude-opus-4-7
19 - claude-opus-4-6
20 - claude-opus-4-5-20251101
21 - claude-sonnet-5
22 - claude-sonnet-4-6
23 supportedPlatforms:
24 Claude API: ga
25 Claude Platform on AWS: ga
26 Amazon Bedrock: ga
27 Google Cloud: ga
28 Microsoft Foundry: ga
529---
6
7## Compatibility
8- [ZDR](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention): eligible (excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements))
9- Supported models: `claude-fable-5-1`, `claude-mythos-5-1`, `claude-fable-5`, `claude-mythos-5`, `claude-mythos-preview`, `claude-opus-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-opus-4-6`, `claude-opus-4-5-20251101`, `claude-sonnet-5`, `claude-sonnet-4-6`
10- Platforms: Claude API, Claude Platform on AWS, Amazon Bedrock, Google Cloud, Microsoft Foundry
1130
1231The effort parameter lets you control how many tokens Claude spends when responding to requests. You can trade off between response thoroughness and token efficiency with a single model. The top-level effort parameter is available on all supported models with no beta header required. [Per-message effort](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta) is in beta.
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