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Replace the retired gemini-2.0-flash PDF reading default #1460

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Replace the retired gemini-2.0-flash PDF reading default #1460

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2 changes: 1 addition & 1 deletion src/Plugins/BotSharp.Plugin.FileHandler/Functions/ReadPdfFn.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -146,7 +146,7 @@ private async Task<string> GetChatCompletion(Agent agent, List<RoleDialogModel>
}

provider = "google-ai";
model = "gemini-2.0-flash";
model = "gemini-3.8-flash";

return (provider, model);
}
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10 changes: 5 additions & 5 deletions src/WebStarter/appsettings.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1119,7 +1119,7 @@
"Provider": "google-ai",
"Models": [
{
"Name": "gemini-2.0-flash",
"Name": "gemini-3.8-flash",
"ApiKey": "",
"Type": "chat",
"MultiModal": true,
Expand All @@ -1129,11 +1129,11 @@
"PdfReading"
],
"Cost": {
"TextInputCost": 0.0015,
"CachedTextInputCost": 0,
"TextInputCost": 0.00075,
"CachedTextInputCost": 0.000075,
"AudioInputCost": 0,
"CachedAudioInputCost": 0,
"TextOutputCost": 0.002,
"TextOutputCost": 0.00375,
"AudioOutputCost": 0
}
},
Expand Down Expand Up @@ -1368,7 +1368,7 @@
"Pdf": {
"Reading": {
"Provider": "google-ai",
"Model": "gemini-2.0-flash",
"Model": "gemini-3.8-flash",
"ConvertToImage": false,
"ImageDetailLevel": "auto",
"ImageConverter": {
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2 changes: 2 additions & 0 deletions tests/BotSharp.Core.UnitTests/BotSharp.Core.UnitTests.csproj
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Expand Up @@ -44,6 +44,8 @@
<ProjectReference Include="..\..\src\Infrastructure\BotSharp.OpenAPI\BotSharp.OpenAPI.csproj" />
<!-- For StreamingToolCallReconstructionTests: the streamed tool-call reconstruction lives here. -->
<ProjectReference Include="..\..\src\Plugins\BotSharp.Plugin.OpenAI\BotSharp.Plugin.OpenAI.csproj" />
<!-- For ReadPdfFnDefaultModelTests: the PDF reading fallback model lives here. -->
<ProjectReference Include="..\..\src\Plugins\BotSharp.Plugin.FileHandler\BotSharp.Plugin.FileHandler.csproj" />
</ItemGroup>

</Project>
26 changes: 26 additions & 0 deletions tests/BotSharp.Core.UnitTests/Plugins/ReadPdfFnDefaultModelTests.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
using System.Reflection;
using BotSharp.Plugin.FileHandler.Functions;
using BotSharp.Plugin.FileHandler.Settings;
using Microsoft.Extensions.Logging.Abstractions;
using Xunit;

namespace BotSharp.Core.UnitTests.Plugins;

public class ReadPdfFnDefaultModelTests
{
// Google shut down gemini-2.0-flash on 2026-06-01, so the model that ReadPdfFn
// falls back to when no FileHandler:Pdf:Reading provider and model are set
// must be one the Gemini API still serves.
[Fact]
public void Falls_back_to_a_gemini_model_that_is_still_served()
{
var fn = new ReadPdfFn(null!, NullLogger<ReadPdfFn>.Instance, new FileHandlerSettings());

var (provider, model) = ((string, string))typeof(ReadPdfFn)
.GetMethod("GetLlmProviderModel", BindingFlags.NonPublic | BindingFlags.Instance)!
.Invoke(fn, null)!;

Assert.Equal("google-ai", provider);
Assert.Equal("gemini-3.8-flash", model);
}
}