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fix: OpenAI reasoning/thinking blocks not showing

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- Use Responses API instead of Chat Completions API for OpenAI
  (.chat() -> default call) to support reasoning events
- Add o4 to reasoning model detection
- Change default reasoningSummary from 'detailed' to 'auto'
  (not all models support 'detailed')
- Update types to match AI SDK: 'auto' | 'detailed'
This commit is contained in:
dayuan.jiang
2025-12-23 13:10:15 +09:00
parent 8cb7494d16
commit 32f7383002
1 changed files with 11 additions and 9 deletions
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20
lib/ai-providers.ts
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@@ -95,8 +95,8 @@ function parseIntSafe(
* Supports various AI SDK providers with their unique configuration options
*
* Environment variables:
* - OPENAI_REASONING_EFFORT: OpenAI reasoning effort level (minimal/low/medium/high) - for o1/o3/gpt-5
* - OPENAI_REASONING_SUMMARY: OpenAI reasoning summary (none/brief/detailed) - auto-enabled for o1/o3/gpt-5
* - OPENAI_REASONING_EFFORT: OpenAI reasoning effort level (minimal/low/medium/high) - for o1/o3/o4/gpt-5
* - OPENAI_REASONING_SUMMARY: OpenAI reasoning summary (auto/detailed) - auto-enabled for o1/o3/o4/gpt-5
* - ANTHROPIC_THINKING_BUDGET_TOKENS: Anthropic thinking budget in tokens (1024-64000)
* - ANTHROPIC_THINKING_TYPE: Anthropic thinking type (enabled)
* - GOOGLE_THINKING_BUDGET: Google Gemini 2.5 thinking budget in tokens (1024-100000)
@@ -118,18 +118,19 @@ function buildProviderOptions(
const reasoningEffort = process.env.OPENAI_REASONING_EFFORT
const reasoningSummary = process.env.OPENAI_REASONING_SUMMARY
// OpenAI reasoning models (o1, o3, gpt-5) need reasoningSummary to return thoughts
// OpenAI reasoning models (o1, o3, o4, gpt-5) need reasoningSummary to return thoughts
if (
modelId &&
(modelId.includes("o1") ||
modelId.includes("o3") ||
modelId.includes("o4") ||
modelId.includes("gpt-5"))
) {
options.openai = {
// Auto-enable reasoning summary for reasoning models (default: detailed)
// Auto-enable reasoning summary for reasoning models
// Use 'auto' as default since not all models support 'detailed'
reasoningSummary:
(reasoningSummary as "none" | "brief" | "detailed") ||
"detailed",
(reasoningSummary as "auto" | "detailed") || "auto",
}
// Optionally configure reasoning effort
@@ -152,8 +153,7 @@ function buildProviderOptions(
}
if (reasoningSummary) {
options.openai.reasoningSummary = reasoningSummary as
| "none"
| "brief"
| "auto"
| "detailed"
}
}
@@ -593,7 +593,9 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
apiKey,
...(baseURL && { baseURL }),
})
model = customOpenAI.chat(modelId)
// Use Responses API (default) instead of .chat() to support reasoning
// for gpt-5, o1, o3, o4 models. Chat Completions API does not emit reasoning events.
model = customOpenAI(modelId)
} else {
model = openai(modelId)
}