when using Response API Method not found: 'OpenAI.Responses.WebSearchTool

[andrew-vdb]

Description

Error: Method not found: 'OpenAI.Responses.WebSearchTool OpenAI.Responses.ResponseTool.CreateWebSearchTool(OpenAI.Responses.WebSearchToolLocation, System.Nullable`1<OpenAI.Responses.WebSearchToolContextSize>)'.

 <PackageReference Include="OpenAI" Version="2.7.0" />
 <PackageReference Include="Microsoft.Extensions.AI" Version="10.0.0" />
 <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="10.0.0-preview.1.25560.10" />
 <PackageReference Include="Microsoft.Extensions.AI.Abstractions" Version="10.0.0" />
 <PackageReference Include="ModelContextProtocol.Core" Version="0.4.0-preview.3" />

Reproduction Steps

Use OpenAIResponseClient instead of ChatClient

Expected behavior

should just work

Actual behavior

Method not found

not sure issue in OpenAI or this library, I'm aware OpenAI making ton of breaking change lately

Regression?

No response

Known Workarounds

Use ChatClient

Configuration

No response

Other information

No response

[stephentoub]

Downgrade:

 <PackageReference Include="OpenAI" Version="2.7.0" />

to

 <PackageReference Include="OpenAI" Version="2.6.0" />

The 2.7 version of the OpenAI package took a binary breaking change, and the other components still depend on the 2.6 version.

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• Error: Method not found: 'OpenAI.Responses.McpTool OpenAI.Responses.ResponseTool.CreateMcpTool( #6847

[mmckechney]

If you are using the Azure.AI.Projects 1.2.0-beta.X and Azure.AI.Projects.OpenAI 1.0.0-beta.X packages to leverage the nextgen Microsoft Foundry, you will need to target the beta.3 versions of both for now - the beta.4 versions target OpenAI 2.7 and will cause a package mismatch error.

[stephentoub]

https://www.nuget.org/packages/Microsoft.Extensions.AI.OpenAI/10.0.1-preview.1.25571.5 references OpenAI 2.7.0.