> ## Documentation Index > Fetch the complete documentation index at: https://docs.blinkops.com/llms.txt > Use this file to discover all available pages before exploring further. # Create Message Create a message request for an Anthropic model and return the model's generated response. External Documentation To learn more, visit the [Anthropic documentation](https://docs.anthropic.com/en/api/messages). ## Basic Parameters
| Parameter | Description | | ------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Adaptive Thinking Effort | Select the thinking depth to guide adaptive thinking behavior.

\* `low` - Minimize thinking. Best for simple, speed-sensitive tasks.
\* `medium` - Use moderate thinking. May skip thinking for very simple queries.
\* `high` - Always think with deep reasoning on complex tasks. This is the default when omitted.
\* `xhigh` - Think deeply with extended exploration. Not supported on all models.
\* `max` - Think with no constraints on depth. Not supported on all models.

**Note**: Only applicable when `Thinking` is set to `adaptive`.

For more information about the `Adaptive Thinking Effort` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/docs/build-with-claude/adaptive-thinking). | | Disable Parallel Tool Use | When checked - restrict the model to use at most one tool at a time and preventing parallel tool usage. | | Max Tokens | The maximum number of tokens to generate before stopping.

Different models have different maximum values for this parameter. Visit [Anthropic documentation](https://docs.anthropic.com/en/docs/about-claude/models/all-models) for more details. | | Messages | The content of the current conversation with the model.

For example:
\[
  \{"role": "user", "content": "Hello there."},
  \{"role": "assistant", "content": "Hi, I'm Claude. How can I help you?"},
  \{"role": "user", "content": "Can you explain LLMs in plain English?"}
]
For more information about the `Messages` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/docs/about-claude/models/all-models) for more details. | | Model | The model that will complete your prompt. | | Thinking | The extended thinking to use before responding.

\* `enabled` - Use a fixed token budget for internal reasoning. Not supported on all models.
\* `adaptive` - Let the model decide when and how much to think. Use `Adaptive Thinking Effort` to control thinking depth. Recommended for models that support adaptive thinking.
\* `disabled` - Do not use extended thinking.

**Notes**:
\* When set to `enabled`, a minimum budget of `1024` tokens is required.
\* Thinking can be used together with `Tools` in the same request. When thinking is `enabled`, set `Tool Choice` to `auto` or `none` only. With `adaptive` thinking, the model can reason between tool calls.

For more information about the `Thinking` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/docs/build-with-claude/extended-thinking). | | Thinking Budget Tokens | The number of tokens the model can use for its internal reasoning process. Larger budgets can enable more thorough analysis for complex problems which improves response quality.

**Note**: Must be at least `1024` and less than the `Max Tokens` value. | | Tool Choice | Define how the model should use the provided tools.

The model can:
\* `auto` - Decide by itself.
\* `any` - Use any available tool.
\* `tool` - Use a specific tool.
\* `none` - Not use tools at all.

**Note**: This parameter may only be specified while providing `Tools`. | | Tool Choice Name | The name of the tool to use. | | Tools | Definitions of tools that the model may use.

Each tool definition includes:
\* `name` - Name of the tool.
\* `description` - Optional, but strongly-recommended description of the tool.
\* `input_schema` - JSON schema for the tool input shape that the model will produce in `tool_use` output content blocks.

For example:
\[
  \{
    "name": "get\_stock\_price",
    "description": "Get the current stock price for a given ticker symbol.",
    "input\_schema": \{
      "type": "object",
      "properties": \{
        "ticker": \{
          "type": "string",
          "description": "The stock ticker symbol, e.g. AAPL for Apple Inc."
        }
      },
      "required": \["ticker"]
    }
  }
]
**Note**: Tools can be used together with `Thinking` in the same request. When thinking is `enabled`, set `Tool Choice` to `auto` or `none` only. For multi-turn tool use, include thinking blocks from prior responses in `Messages`.

For more information about the `Tools` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/api/messages#body-tools). |
## Advanced Parameters
| Parameter | Description | | ------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Stop Sequences | A comma-separated list of character sequences that will stop output generation. If specified, the response will stop at the first appearance of a `Stop Sequence`. The stop sequence will not be included as part of the response.

Example: `STOP,END` | | System Instructions | Context and instructions to provide to the model, such as specifying a particular goal or role.

For example:
You are a seasoned data scientist at a Fortune 500 company.
For more information about the `System` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/docs/build-with-claude/prompt-engineering/system-prompts). | | Temperature | The randomness of the output.

Values can range from `0.0` to `1.0`.

**Note**: Setting a non-default value may not be supported on all models. | | Top K | Limit the model to only consider the top K most likely options when selecting each word. This reduces random or unusual responses by filtering out less probable choices. For most cases, using `Temperature` is sufficient.

Valid values are larger than `0`.

**Note**: Setting a non-default value may not be supported on all models.

For more information about the `Top K` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/api/messages#body-top-k). | | Top P | Control text variety by only considering the most likely words whose combined probability reaches the specified `Top P` value. This helps balance creativity and relevance in responses.

Values can range from `0.0` to `1.0`.

**Note**: Either use this parameter or `Temperature`, but not both. Setting a non-default value may not be supported on all models.

For more information about the `Top P` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/api/messages#body-top-p). | | User ID | An external identifier for the user who is associated with the request.

For more information about the `User ID` parameter, visit [Anthropic documentation](https://docs.anthropic.com/en/api/messages#body-metadata-user-id). |
## Example Output ```json theme={"dark"} { "content": [ { "text": "Hi! My name is Claude.", "type": "text" } ], "id": "msg_013Zva2CMHLNnXjNJJKqJ2EF", "model": "claude-3-7-sonnet-20250219", "role": "assistant", "stop_reason": "end_turn", "stop_sequence": null, "type": "message", "usage": { "input_tokens": 2095, "output_tokens": 503 } } ``` ## Workflow Library Example [Create Message with Anthropic and Send Results Via Email](https://library.blinkops.com/workflows/create-message-with-anthropic-and-send-results-via-email)
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