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feat(translator): report cached token usage in Claude output

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This commit is contained in:
hkfires
2026-01-19 11:23:44 +08:00
parent 140d6211cc
commit cf9daf470c
2 changed files with 67 additions and 25 deletions
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53
internal/translator/openai/claude/openai_claude_response.go
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@@ -289,21 +289,17 @@ func convertOpenAIStreamingChunkToAnthropic(rawJSON []byte, param *ConvertOpenAI
// Only process if usage has actual values (not null)
if param.FinishReason != "" {
usage := root.Get("usage")
var inputTokens, outputTokens int64
var inputTokens, outputTokens, cachedTokens int64
if usage.Exists() && usage.Type != gjson.Null {
// Check if usage has actual token counts
promptTokens := usage.Get("prompt_tokens")
completionTokens := usage.Get("completion_tokens")
if promptTokens.Exists() && completionTokens.Exists() {
inputTokens = promptTokens.Int()
outputTokens = completionTokens.Int()
}
inputTokens, outputTokens, cachedTokens = extractOpenAIUsage(usage)
// Send message_delta with usage
messageDeltaJSON := `{"type":"message_delta","delta":{"stop_reason":"","stop_sequence":null},"usage":{"input_tokens":0,"output_tokens":0}}`
messageDeltaJSON, _ = sjson.Set(messageDeltaJSON, "delta.stop_reason", mapOpenAIFinishReasonToAnthropic(param.FinishReason))
messageDeltaJSON, _ = sjson.Set(messageDeltaJSON, "usage.input_tokens", inputTokens)
messageDeltaJSON, _ = sjson.Set(messageDeltaJSON, "usage.output_tokens", outputTokens)
if cachedTokens > 0 {
messageDeltaJSON, _ = sjson.Set(messageDeltaJSON, "usage.cache_read_input_tokens", cachedTokens)
}
results = append(results, "event: message_delta\ndata: "+messageDeltaJSON+"\n\n")
param.MessageDeltaSent = true
@@ -423,13 +419,12 @@ func convertOpenAINonStreamingToAnthropic(rawJSON []byte) []string {
// Set usage information
if usage := root.Get("usage"); usage.Exists() {
out, _ = sjson.Set(out, "usage.input_tokens", usage.Get("prompt_tokens").Int())
out, _ = sjson.Set(out, "usage.output_tokens", usage.Get("completion_tokens").Int())
reasoningTokens := int64(0)
if v := usage.Get("completion_tokens_details.reasoning_tokens"); v.Exists() {
reasoningTokens = v.Int()
inputTokens, outputTokens, cachedTokens := extractOpenAIUsage(usage)
out, _ = sjson.Set(out, "usage.input_tokens", inputTokens)
out, _ = sjson.Set(out, "usage.output_tokens", outputTokens)
if cachedTokens > 0 {
out, _ = sjson.Set(out, "usage.cache_read_input_tokens", cachedTokens)
}
out, _ = sjson.Set(out, "usage.reasoning_tokens", reasoningTokens)
}
return []string{out}
@@ -674,8 +669,12 @@ func ConvertOpenAIResponseToClaudeNonStream(_ context.Context, _ string, origina
}
if respUsage := root.Get("usage"); respUsage.Exists() {
out, _ = sjson.Set(out, "usage.input_tokens", respUsage.Get("prompt_tokens").Int())
out, _ = sjson.Set(out, "usage.output_tokens", respUsage.Get("completion_tokens").Int())
inputTokens, outputTokens, cachedTokens := extractOpenAIUsage(respUsage)
out, _ = sjson.Set(out, "usage.input_tokens", inputTokens)
out, _ = sjson.Set(out, "usage.output_tokens", outputTokens)
if cachedTokens > 0 {
out, _ = sjson.Set(out, "usage.cache_read_input_tokens", cachedTokens)
}
}
if !stopReasonSet {
@@ -692,3 +691,23 @@ func ConvertOpenAIResponseToClaudeNonStream(_ context.Context, _ string, origina
func ClaudeTokenCount(ctx context.Context, count int64) string {
return fmt.Sprintf(`{"input_tokens":%d}`, count)
}
func extractOpenAIUsage(usage gjson.Result) (int64, int64, int64) {
if !usage.Exists() || usage.Type == gjson.Null {
return 0, 0, 0
}
inputTokens := usage.Get("prompt_tokens").Int()
outputTokens := usage.Get("completion_tokens").Int()
cachedTokens := usage.Get("prompt_tokens_details.cached_tokens").Int()
if cachedTokens > 0 {
if inputTokens >= cachedTokens {
inputTokens -= cachedTokens
} else {
inputTokens = 0
}
}
return inputTokens, outputTokens, cachedTokens
}