Gemini Pro の予算設定について、-1 を使用するとエラーが発生します

Forum Helper ペルソナの Posts Triage で LLM gemini pro 最新モデル (gemini-pro-latest) を使用しようとすると、エラーが発生します。

DiscourseAi::Completions::Endpoints::Gemini: status: 400 - body: {
  "error": {
    "code": 400,
    "message": "Budget 0 is invalid. This model only works in thinking mode.",
    "status": "INVALID_ARGUMENT"
  }
}


Backtrace

activesupport-8.0.4/lib/active_support/broadcast_logger.rb:218:in `block in dispatch'
activesupport-8.0.4/lib/active_support/broadcast_logger.rb:217:in `map'
activesupport-8.0.4/lib/active_support/broadcast_logger.rb:217:in `dispatch'
activesupport-8.0.4/lib/active_support/broadcast_logger.rb:129:in `error'
/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/base.rb:189:in `block (2 levels) in perform_completion!'
net-http-0.7.0/lib/net/http.rb:2428:in `block in transport_request'
net-http-0.7.0/lib/net/http/response.rb:320:in `reading_body'
net-http-0.7.0/lib/net/http.rb:2425:in `transport_request'
net-http-0.7.0/lib/net/http.rb:2379:in `request'
rack-mini-profiler-4.0.1/lib/patches/net_patches.rb:19:in `block in request_with_mini_profiler'
rack-mini-profiler-4.0.1/lib/mini_profiler/profiling_methods.rb:51:in `step'
rack-mini-profiler-4.0.1/lib/patches/net_patches.rb:18:in `request_with_mini_profiler'
/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/base.rb:187:in `block in perform_completion!'
net-http-0.7.0/lib/net/http.rb:1626:in `start'
net-http-0.7.0/lib/net/http.rb:1064:in `start'
/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/base.rb:140:in `perform_completion!'
/var/www/discourse/plugins/discourse-ai/lib/completions/llm.rb:447:in `generate'
/var/www/discourse/plugins/discourse-ai/lib/configuration/llm_validator.rb:36:in `run_test'
/var/www/discourse/plugins/discourse-ai/app/controllers/discourse_ai/admin/ai_llms_controller.rb:148:in `test'
actionpack-8.0.4/lib/action_controller/metal/basic_implicit_render.rb:8:in `send_action'
actionpack-8.0.4/lib/abstract_controller/base.rb:215:in `process_action'
actionpack-8.0.4/lib/action_controller/metal/rendering.rb:193:in `process_action'
actionpack-8.0.4/lib/abstract_controller/callbacks.rb:261:in `block in process_action'
activesupport-8.0.4/lib/active_support/callbacks.rb:120:in `block in run_callbacks'
/var/www/discourse/app/controllers/application_controller.rb:439:in `block in with_resolved_locale'
i18n-1.14.7/lib/i18n.rb:353:in `with_locale'
/var/www/discourse/app/controllers/application_controller.rb:439:in `with_resolved_locale'
activesupport-8.0.4/lib/active_support/callbacks.rb:129:in `block in run_callbacks'
/var/www/discourse/app/controllers/application_controller.rb:1072:in `ensure_dont_cache_page'
activesupport-8.0.4/lib/active_support/callbacks.rb:129:in `block in run_callbacks'
activesupport-8.0.4/lib/active_support/callbacks.rb:140:in `run_callbacks'
actionpack-8.0.4/lib/abstract_controller/callbacks.rb:260:in `process_action'
actionpack-8.0.4/lib/action_controller/metal/rescue.rb:27:in `process_action'
actionpack-8.0.4/lib/action_controller/metal/instrumentation.rb:76:in `block in process_action'
activesupport-8.0.4/lib/active_support/notifications.rb:210:in `block in instrument'
activesupport-8.0.4/lib/active_support/notifications/instrumenter.rb:58:in `instrument'
activesupport-8.0.4/lib/active_support/notifications.rb:210:in `instrument'
actionpack-8.0.4/lib/action_controller/metal/instrumentation.rb:75:in `process_action'
actionpack-8.0.4/lib/action_controller/metal/params_wrapper.rb:259:in `process_action'
activerecord-8.0.4/lib/active_record/railties/controller_runtime.rb:39:in `process_action'
actionpack-8.0.4/lib/abstract_controller/base.rb:152:in `process'
actionview-8.0.4/lib/action_view/rendering.rb:40:in `process'
rack-mini-profiler-4.0.1/lib/mini_profiler/profiling_methods.rb:90:in `block in profile_method'
actionpack-8.0.4/lib/action_controller/metal.rb:252:in `dispatch'
actionpack-8.0.4/lib/action_controller/metal.rb:335:in `dispatch'
actionpack-8.0.4/lib/action_dispatch/routing/route_set.rb:67:in `dispatch'
actionpack-8.0.4/lib/action_dispatch/routing/route_set.rb:50:in `serve'
actionpack-8.0.4/lib/action_dispatch/routing/mapper.rb:32:in `block in <class:Constraints>'
actionpack-8.0.4/lib/action_dispatch/routing/mapper.rb:62:in `serve'
actionpack-8.0.4/lib/action_dispatch/journey/router.rb:53:in `block in serve'
actionpack-8.0.4/lib/action_dispatch/journey/router.rb:133:in `block in find_routes'
actionpack-8.0.4/lib/action_dispatch/journey/router.rb:126:in `each'
actionpack-8.0.4/lib/action_dispatch/journey/router.rb:126:in `find_routes'
actionpack-8.0.4/lib/action_dispatch/journey/router.rb:34:in `serve'
actionpack-8.0.4/lib/action_dispatch/routing/route_set.rb:908:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:35:in `call'
/var/www/discourse/lib/middleware/crawler_hooks.rb:11:in `call'
rack-2.2.21/lib/rack/tempfile_reaper.rb:15:in `call'
rack-2.2.21/lib/rack/conditional_get.rb:27:in `call'
rack-2.2.21/lib/rack/head.rb:12:in `call'
actionpack-8.0.4/lib/action_dispatch/http/permissions_policy.rb:38:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:415:in `call'
/var/www/discourse/lib/middleware/csp_script_nonce_injector.rb:12:in `call'
/var/www/discourse/config/initializers/008-rack-cors.rb:14:in `call'
rack-2.2.21/lib/rack/session/abstract/id.rb:266:in `context'
rack-2.2.21/lib/rack/session/abstract/id.rb:260:in `call'
actionpack-8.0.4/lib/action_dispatch/middleware/cookies.rb:706:in `call'
actionpack-8.0.4/lib/action_dispatch/middleware/callbacks.rb:31:in `block in call'
activesupport-8.0.4/lib/active_support/callbacks.rb:100:in `run_callbacks'
actionpack-8.0.4/lib/action_dispatch/middleware/callbacks.rb:30:in `call'
actionpack-8.0.4/lib/action_dispatch/middleware/debug_exceptions.rb:31:in `call'
actionpack-8.0.4/lib/action_dispatch/middleware/show_exceptions.rb:32:in `call'
logster-2.20.1/lib/logster/middleware/reporter.rb:40:in `call'
/var/www/discourse/lib/middleware/default_headers.rb:13:in `call'
railties-8.0.4/lib/rails/rack/logger.rb:41:in `call_app'
railties-8.0.4/lib/rails/rack/logger.rb:29:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:20:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:29:in `call'
actionpack-8.0.4/lib/action_dispatch/middleware/request_id.rb:34:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:23:in `call'
rack-2.2.21/lib/rack/method_override.rb:24:in `call'
actionpack-8.0.4/lib/action_dispatch/middleware/executor.rb:16:in `call'
rack-2.2.21/lib/rack/sendfile.rb:127:in `call'
rack-mini-profiler-4.0.1/lib/mini_profiler.rb:191:in `call'
/var/www/discourse/lib/middleware/processing_request.rb:12:in `call'
message_bus-4.4.1/lib/message_bus/rack/middleware.rb:60:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:376:in `call'
actionpack-8.0.4/lib/action_dispatch/middleware/remote_ip.rb:96:in `call'
railties-8.0.4/lib/rails/engine.rb:535:in `call'
railties-8.0.4/lib/rails/railtie.rb:226:in `public_send'
railties-8.0.4/lib/rails/railtie.rb:226:in `method_missing'
rack-2.2.21/lib/rack/urlmap.rb:74:in `block in call'
rack-2.2.21/lib/rack/urlmap.rb:58:in `each'
rack-2.2.21/lib/rack/urlmap.rb:58:in `call'
unicorn-6.1.0/lib/unicorn/http_server.rb:634:in `process_client'
unicorn-6.1.0/lib/unicorn/http_server.rb:739:in `worker_loop'
unicorn-6.1.0/lib/unicorn/http_server.rb:547:in `spawn_missing_workers'
unicorn-6.1.0/lib/unicorn/http_server.rb:143:in `start'
unicorn-6.1.0/bin/unicorn:128:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
/var/www/discourse/vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `<main>'

モデルに Auto シンキングバジェットを使用するように指示するためにバジェットを -1 に設定できると読みましたが、Discourse は -1 をオプションとしてサポートしていません。-1 を設定すると、Discourse は 0 を送信しているようです。入力は数値のみをサポートしているため、auto のようなオプションも試すことができません。

また、-1 が使用できない場合、LLM パラメータに設定するのに適したバジェットはどれくらいでしょうか?