> ## Documentation Index > Fetch the complete documentation index at: https://docs.runaether.dev/llms.txt > Use this file to discover all available pages before exploring further. # Choose what your agent thinks with and its model > Sets what your personal agent thinks with, aether (Aether inference, paid from your balance and held to the daily cap) or claude (your stored Claude Code credential: your Claude plan's setup token or your Anthropic API key), and the model it converses on, together. Scheduled jobs run on Claude Haiku 5.5 unless a job names a model. Hermes applies a change when it next starts: an agent that is running restarts once it takes commands; setting what it already holds changes nothing, except that while the agent is going to sleep or pausing even that is refused (409 agent_host_illegal_transition). 400 for a thinks_with or model outside the listed values; 409 agent_inference_not_connected for claude without your Claude Code credential stored; 409 agent_host_illegal_transition while the agent is going to sleep or pausing. ## OpenAPI ````yaml api-reference/openapi.account.json PUT /agent/inference openapi: 3.1.0 info: title: Aether Account & Integrations API version: 0.1.0 description: >- Account, billing, and integration-management endpoints used by the Aether web app and CLI. Root-mounted; NOT part of the versioned /v1 contract. servers: - url: https://api.runaether.dev security: - bearerAuth: [] paths: /agent/inference: put: tags: - agent summary: Choose what your agent thinks with and its model description: >- Sets what your personal agent thinks with, aether (Aether inference, paid from your balance and held to the daily cap) or claude (your stored Claude Code credential: your Claude plan's setup token or your Anthropic API key), and the model it converses on, together. Scheduled jobs run on Claude Haiku 5.5 unless a job names a model. Hermes applies a change when it next starts: an agent that is running restarts once it takes commands; setting what it already holds changes nothing, except that while the agent is going to sleep or pausing even that is refused (409 agent_host_illegal_transition). 400 for a thinks_with or model outside the listed values; 409 agent_inference_not_connected for claude without your Claude Code credential stored; 409 agent_host_illegal_transition while the agent is going to sleep or pausing. operationId: setAgentInference requestBody: content: application/json: schema: $ref: '#/components/schemas/SetAgentInferenceRequest' required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/Agent' description: OK '400': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Bad Request '401': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Unauthorized '403': content: application/json: schema: $ref: '#/components/schemas/OrgAuthorizationErrorResponse' description: Forbidden '404': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Not Found '409': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Conflict '422': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Unprocessable Entity '500': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Internal Server Error components: schemas: SetAgentInferenceRequest: additionalProperties: false properties: model: description: >- The model your agent converses on: claude-fable-5-1, claude-opus-5-5, claude-sonnet-5-5 or claude-haiku-5-5. type: string thinks_with: description: >- What your agent thinks with: aether or claude. claude needs your Claude Code credential stored. type: string required: - thinks_with - model type: object Agent: additionalProperties: false properties: browser_tools: description: >- Whether your agent may drive a browser. Off by default; a change applies when Hermes next starts, which a running agent does at once. type: boolean created_at: format: date-time type: string cron_model: description: >- The model your agent's scheduled jobs run on, unless a job names another. enum: - claude-fable-5-1 - claude-opus-5-5 - claude-sonnet-5-5 - claude-haiku-5-5 type: string default_project_id: description: >- The project a task your agent starts runs on when it names no repository. Without it such a task is refused. format: uuid type: string id: format: uuid type: string last_used_at: description: >- When your agent was created or resumed, was sent a message, or last worked. Thirty days unused pauses it. format: date-time type: string model: description: The model your agent converses on. enum: - claude-fable-5-1 - claude-opus-5-5 - claude-sonnet-5-5 - claude-haiku-5-5 type: string state: description: >- The host's lifecycle state. running: Hermes takes messages now; suspending and idle: asleep, woken by the next message; waking, resuming: coming up for a message; provisioning and booting: being created; updating: moving onto a new image; pausing and paused: backed up after thirty days unused, or paused by you, and resumed by you (a message from the web does not resume it); lost: its machine is gone and only deleting it helps; destroying: being deleted. enum: - provisioning - booting - running - suspending - idle - waking - updating - pausing - paused - resuming - lost - destroying - destroyed type: string thinks_with: description: >- What your agent thinks with: aether, Aether inference, paid from your balance and held to the daily cap; claude, your Claude Code credential, your Claude plan's setup token or your Anthropic API key, neither paid from your balance nor held to the cap. enum: - aether - claude type: string required: - id - state - browser_tools - thinks_with - model - cron_model - last_used_at - created_at type: object ErrorResponse: additionalProperties: false properties: code: type: string error: minLength: 1 type: string errors: items: $ref: '#/components/schemas/ErrorDetail' type: array required: - error type: object OrgAuthorizationErrorResponse: additionalProperties: false properties: code: enum: - org_membership_required - org_role_insufficient - org_suspended - account_deleting type: string error: minLength: 1 type: string required: - error - code type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object securitySchemes: bearerAuth: bearerFormat: JWT scheme: bearer type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.