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fix(aibridge): support Bedrock Opus 4.8 adaptive thinking #26691

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Merged
pawbana merged 1 commit into from
Jun 25, 2026
+8 −1
Merged

fix(aibridge): support Bedrock Opus 4.8 adaptive thinking #26691

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3 changes: 2 additions & 1 deletion aibridge/intercept/messages/base.go
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Original file line number Diff line number Diff line change
Expand Up @@ -417,7 +417,8 @@ func bedrockModelSupportsAdaptiveThinking(model string) bool {
//
// See https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-7.html
func bedrockModelRequiresAdaptiveThinking(model string) bool {
return strings.Contains(model, "anthropic.claude-opus-4-7")
return strings.Contains(model, "anthropic.claude-opus-4-7") ||
strings.Contains(model, "anthropic.claude-opus-4-8")
}

// filterBedrockBetaFlags removes unsupported beta flags from the Anthropic-Beta
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6 changes: 6 additions & 0 deletions aibridge/intercept/messages/base_internal_test.go
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Expand Up @@ -759,6 +759,12 @@ func TestAugmentRequestForBedrock_AdaptiveThinking(t *testing.T) {
requestBody: `{"max_tokens":10000,"thinking":{"type":"enabled","budget_tokens":8000}}`,
expectThinkingType: "adaptive",
},
{
name: "opus_4_8_model_with_enabled_thinking_is_converted_to_adaptive_and_drops_budget",
bedrockModel: "eu.anthropic.claude-opus-4-8",
requestBody: `{"max_tokens":10000,"thinking":{"type":"enabled","budget_tokens":5000}}`,
expectThinkingType: "adaptive",
},
{
// Opus 4.7 on Bedrock rejects output_config.format (structured
// outputs) with a 400 even though it accepts output_config.effort.
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