ChatAnthropic does not work

[tiago1397]

Describe the bug

ChatAnthropic for AgentFlows v1 is not working on latest version. It returns the following error:
Error buildAgentGraph - Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"top_p cannot be set to -1 for this model."},"request_id":"req_011CZ97oBy7vML5H7qRRw5nM"}

To Reproduce

1. Create new AgentFlows v1
2. Add ChatAnthropic
3. Add base nodes to chat with anthropic model
4. Test send a message

Issue:
Error buildAgentGraph - Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"top_p cannot be set to -1 for this model."},"request_id":"req_011CZ97oBy7vML5H7qRRw5nM"}

Expected behavior

It should be possible to use ChatAnthropic

Screenshots

Flow

No response

Use Method

None

Flowise Version

No response

Operating System

None

Browser

None

Additional context

No response

[BadrLaajali]

Same problem

[0xRozier]

Hi I can investigate on this today, and open a PR if needed. Is it okay with you @tiago1397 @BadrLaajali ?

[tiago1397]

Hi I can investigate on this today, and open a PR if needed. Is it okay with you @tiago1397 @BadrLaajali ?

Hi, yes, we need it fixed as soon as possible. Thank you.

[HenryHengZJ]

Does it happens only on Agentflow V1?

[HenryHengZJ]

I used Opus 4.6, tried with reasoning turned on and off, but it still works?

[0xRozier]

After further investigation, this is likely fixed in Flowise v3.1.0 which upgraded @langchain/anthropic from 0.3.33 to 1.3.20
— the old version used -1 as a default for top_p and sent it to the API.
@tiago1397 which version are you on?

[HenryHengZJ]

After further investigation, this is likely fixed in Flowise v3.1.0 which upgraded @langchain/anthropic from 0.3.33 to 1.3.20 — the old version used -1 as a default for top_p and sent it to the API. @tiago1397 which version are you on?

exactly, I can replicate this issue in previous version, but latest should already solved it

[tiago1397]

@HenryHengZJ we are using version 3.0.2 that does not have a node called Anthropic Claude. Only has ChatAnthropic

[HenryHengZJ]

@tiago1397 try the latest version and see