API Error: eager_input_streaming field not permitted

[hyc1005]

Description

Error

Error from provider: 13 request validation errors: Extra inputs are not permitted, field: 'tools[0].eager_input_streaming', value: True; ... (repeated for all 13 tools)

Description

When using opencode, the client sends tool definitions with eager_input_streaming parameter which is not supported by the backend API. This causes the request to fail with validation errors.

Expected Behavior

Tools should be sent without the eager_input_streaming parameter, or the client should check API compatibility.

Plugins

No response

OpenCode version

latest

Steps to reproduce

1. Use opencode with backend API
2. Send a message that requires tool use
3. Error occurs immediately

Screenshot and/or share link

No response

Operating System

win 11

Terminal

No response

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [Bug] claude-haiku-4-5 via GitHub Copilot suddenly fails with "eager_input_streaming: Extra inputs are not permitted" #23257: Same eager_input_streaming: Extra inputs are not permitted error via GitHub Copilot (closed)
• eager_input_streaming field breaks custom @ai-sdk/anthropic providers (Bedrock proxies, corporate gateways) #23767: Same eager_input_streaming field breaking custom @ai-sdk/anthropic providers/proxies (closed)
• google-vertex-anthropic rejects eager_input_streaming on tool definitions — same as #23342 #24562: Same error for google-vertex-anthropic provider (closed)
• Anthropic-compatible proxy endpoints fail on eager_input_streaming tool field #23541: Same error on Anthropic-compatible proxy endpoints (closed)

These issues share the same root cause: @ai-sdk/anthropic injects eager_input_streaming: true into tool definitions, which is rejected by API proxies and gateways that perform strict validation. If your setup isn't covered by the existing fixes, please clarify which provider/backend you are using so maintainers can track it.

[rekram1-node]

absolutely not enough information: what provider?

In your opencode.json try setting this under provider definition:

"options": { "toolStreaming": false }

[grayguava]

absolutely not enough information: what provider?

In your opencode.json try setting this under provider definition:

"options": { "toolStreaming": false }

I am also facing similar issue but only with the MiniMax M2.5 Free model. And about opencode.json - where exactly to find that?
[Desktop app, Win 10]

[rekram1-node]

@grayguava put it under "opencode" provider key in ur config youll have to create it

[grayguava]

@grayguava put it under "opencode" provider key in ur config youll have to create it

Thanks. i’m using the desktop app so i’m not sure where the config file is located or what the correct structure should look like.

Could you point me to:

1. where opencode.json is stored on Windows desktop installs
2. an example of how the opencode provider block should be formatted?

the issue only happens for MiniMax M2.5 Free for me , other models work fine tho.

[RGalli]

I think the issue only happens with the MiniMax M2.5 Free model. I’m facing the same problem here using the opencode CLI, and it stopped as soon as I switched models.

[abdihaikal]

@grayguava put it under "opencode" provider key in ur config youll have to create it

Thanks. i’m using the desktop app so i’m not sure where the config file is located or what the correct structure should look like.

Could you point me to:

1. where opencode.json is stored on Windows desktop installs
2. an example of how the opencode provider block should be formatted?

the issue only happens for MiniMax M2.5 Free for me , other models work fine tho.

You can find it here:
C:\Users\<YourUsername>\.config\opencode