fix(apicompat): Anthropic 转 Responses 时按 OpenAI 语义汇总 input_tokens#1
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fix(apicompat): Anthropic 转 Responses 时按 OpenAI 语义汇总 input_tokens#1stabey wants to merge 1 commit into
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…hropic to Responses Anthropic Messages reports input_tokens excluding cache_read/cache_creation, but OpenAI Responses input_tokens is the total including cached tokens. The reverse converter passed Anthropic's input_tokens straight through, so client-facing prompt_tokens/input_tokens were short by the cached count and cache_creation was dropped entirely. Fix the non-stream path and the streaming state machine to add cache_read + cache_creation back into input_tokens, and track CacheCreationInputTokens on the streaming state. Six downstream paths benefit (Anthropic->Responses, Anthropic->ChatCompletions, Gemini->ChatCompletions, each sync + stream). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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概述
input_tokens不包含cache_read_input_tokens和cache_creation_input_tokens；而 OpenAI Responses 的input_tokens是包含缓存命中的总输入。backend/internal/pkg/apicompat/anthropic_to_responses_response.go里的AnthropicToResponsesResponse和流式 state machine）把 Anthropic 的InputTokens直接透传给了 OpenAI 侧，导致客户端看到的prompt_tokens/input_tokens少计了缓存命中部分,cache_creation则被完全丢弃。makeResponsesCompletedEvent,在写入InputTokens时把cache_read + cache_creation加回去;同时在流式 state 中新增CacheCreationInputTokens字段,并在message_start和message_delta中正确捕获。gateway_forward_as_responses.gogateway_forward_as_chat_completions.gogemini_chat_completions_compat_service.go(链路:Gemini → Anthropic → Responses → CC)计费路径不受影响:计费读的是
ForwardResult.Usage(Anthropic 语义,从原始事件构建),不依赖被翻坏的响应体。测试计划
go test ./internal/pkg/apicompat/...—— 新增测试覆盖非流式 + 流式,cache 字段分别在message_start和message_delta中下发两种情况go test -tags unit -run "TestHandleResponses|TestHandleCC|Gemini|Antigravity" ./internal/service/go vet ./internal/pkg/apicompat/... ./internal/service/...新增测试位于
backend/internal/pkg/apicompat/anthropic_responses_test.go:TestAnthropicToResponsesResponse_CacheTokensUseOpenAIInputSemanticsTestAnthropicToResponsesResponse_NoCacheTokensTestAnthropicEventToResponses_CacheTokensRoundTripFromMessageStartTestAnthropicEventToResponses_CacheTokensFromMessageDelta🤖 Generated with Claude Code