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- List Models
ActionAnthropicUpdated May 2026
Which Claude models are available?
Short answer: Drop the "Anthropic → List Models" action anywhere in your workflow, map the inputs from upstream nodes, and publish.
Sample request
{}
Returns
{"data": [{"id": "claude-sonnet-4-20250514","type": "model","created_at": "2025-05-14T00:00:00Z","display_name": "Claude Sonnet 4"}]}
Use these fields in downstream nodes for routing, logging, or error handling.
Triggered by
Apps that pair well as the trigger for List Models.
Any of these apps can fire this action as part of a workflow.
FAQ
Questions about List Models.
What does the List Models action do in Anthropic?
Lists available Claude models with their display names and context windows. Used to populate a dynamic model picker.
What inputs does List Models require?
List Models has no required inputs. Sensible defaults are applied if you leave fields blank.
Can I use dynamic inputs from earlier workflow nodes?
Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.
What happens if Anthropic returns an error?
The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.
Does List Models support batch operations?
Yes. Run List Models inside a Loop node to process arrays. Tiny Command handles Anthropic's rate limits automatically so you don't have to throttle manually.
More actions
Other Anthropic actions.
Action
Analyze Image
Sends an image to Claude for analysis (vision), via URL or base64 bytes alongside a text prompt. Use for OCR, chart extraction, accessibility alt-text, or visual QA flows.
ActionCancel Message Batch
Cancels a message batch that is still processing. Already-completed entries in the batch keep their results; in-flight ones get cancelled with no charge.
ActionComputer Use
Sends a message with the computer-use tool, letting Claude take screenshots and click/type on a virtual desktop. Requires Opus 4.x or Sonnet 4.x; you provide the sandboxed desktop environment.
ActionCount Tokens
Counts the number of tokens a Messages API call would consume without actually sending the message. Useful for cost estimation and to stay under context-window limits.
ActionCreate Message
Sends a message to a Claude model and gets a response. The core Anthropic action; supports system prompts, multi-turn conversation, temperature, and stop sequences.
ActionCreate Message Batch
Creates a batch of messages for async processing on the Messages API, with a 50% cost reduction and up to 24-hour turnaround. Perfect for bulk classification, summarization, or labeling jobs.
Send list models from your workflows.
Triggered by anything in the catalog. Free tier available. No credit card.