A partire dal 29 aprile 2025, i modelli Gemini 1.5 Pro e Gemini 1.5 Flash non sono disponibili nei progetti che non li hanno mai utilizzati, inclusi i nuovi progetti. Per maggiori dettagli, vedi
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Crea una cache di contesto
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Crea una cache contestuale per ridurre i costi con richieste ripetute che contengono lo stesso input di conteggio dei token.
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Per la documentazione dettagliata che include questo esempio di codice, vedi quanto segue:
Esempio di codice
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[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","otherDown","thumb-down"]],[],[],[],null,["# Create a context cache to reduce costs with repeated requests that contain the same token count input.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Create a context cache](/vertex-ai/generative-ai/docs/context-cache/context-cache-create)\n\nCode sample\n-----------\n\n### Go\n\n\nBefore trying this sample, follow the Go setup instructions in the\n[Vertex AI quickstart using\nclient libraries](/vertex-ai/docs/start/client-libraries).\n\n\nFor more information, see the\n[Vertex AI Go API\nreference documentation](/go/docs/reference/cloud.google.com/go/aiplatform/latest/apiv1).\n\n\nTo authenticate to Vertex AI, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n import (\n \t\"context\"\n \t\"encoding/json\"\n \t\"fmt\"\n \t\"io\"\n \t\"time\"\n\n \tgenai \"google.golang.org/genai\"\n )\n\n // createContentCache shows how to create a content cache with an expiration parameter.\n func createContentCache(w io.Writer) (string, error) {\n \tctx := context.Background()\n\n \tclient, err := genai.NewClient(ctx, &genai.ClientConfig{\n \t\tHTTPOptions: genai.HTTPOptions{APIVersion: \"v1\"},\n \t})\n \tif err != nil {\n \t\treturn \"\", fmt.Errorf(\"failed to create genai client: %w\", err)\n \t}\n\n \tmodelName := \"gemini-2.5-flash\"\n\n \tsystemInstruction := \"You are an expert researcher. You always stick to the facts \" +\n \t\t\"in the sources provided, and never make up new facts. \" +\n \t\t\"Now look at these research papers, and answer the following questions.\"\n\n \tcacheContents := []*genai.Content{\n \t\t{\n \t\t\tParts: []*genai.Part{\n \t\t\t\t{FileData: &genai.FileData{\n \t\t\t\t\tFileURI: \"gs://cloud-samples-data/generative-ai/pdf/2312.11805v3.pdf\",\n \t\t\t\t\tMIMEType: \"application/pdf\",\n \t\t\t\t}},\n \t\t\t\t{FileData: &genai.FileData{\n \t\t\t\t\tFileURI: \"gs://cloud-samples-data/generative-ai/pdf/2403.05530.pdf\",\n \t\t\t\t\tMIMEType: \"application/pdf\",\n \t\t\t\t}},\n \t\t\t},\n \t\t\tRole: \"user\",\n \t\t},\n \t}\n \tconfig := &genai.CreateCachedContentConfig{\n \t\tContents: cacheContents,\n \t\tSystemInstruction: &genai.Content{\n \t\t\tParts: []*genai.Part{\n \t\t\t\t{Text: systemInstruction},\n \t\t\t},\n \t\t},\n \t\tDisplayName: \"example-cache\",\n \t\tTTL: time.Duration(time.Duration.Seconds(86400)),\n \t}\n\n \tres, err := client.Caches.Create(ctx, modelName, config)\n \tif err != nil {\n \t\treturn \"\", fmt.Errorf(\"failed to create content cache: %w\", err)\n \t}\n\n \tcachedContent, err := json.MarshalIndent(res, \"\", \" \")\n \tif err != nil {\n \t\treturn \"\", fmt.Errorf(\"failed to marshal cache info: %w\", err)\n \t}\n\n \t// See the documentation: https://pkg.go.dev/google.golang.org/genai#CachedContent\n \tfmt.Fprintln(w, string(cachedContent))\n\n \t// Example response:\n \t// {\n \t// \"name\": \"projects/111111111111/locations/us-central1/cachedContents/1111111111111111111\",\n \t// \"displayName\": \"example-cache\",\n \t// \"model\": \"projects/111111111111/locations/us-central1/publishers/google/models/gemini-2.5-flash\",\n \t// \"createTime\": \"2025-02-18T15:05:08.29468Z\",\n \t// \"updateTime\": \"2025-02-18T15:05:08.29468Z\",\n \t// \"expireTime\": \"2025-02-19T15:05:08.280828Z\",\n \t// \"usageMetadata\": {\n \t// \"imageCount\": 167,\n \t// \"textCount\": 153,\n \t// \"totalTokenCount\": 43125\n \t// }\n \t// }\n\n \treturn res.Name, nil\n }\n\n### Python\n\n\nBefore trying this sample, follow the Python setup instructions in the\n[Vertex AI quickstart using\nclient libraries](/vertex-ai/docs/start/client-libraries).\n\n\nFor more information, see the\n[Vertex AI Python API\nreference documentation](/python/docs/reference/aiplatform/latest).\n\n\nTo authenticate to Vertex AI, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n from google import genai\n from google.genai.types import Content, CreateCachedContentConfig, HttpOptions, Part\n\n client = genai.Client(http_options=HttpOptions(api_version=\"v1\"))\n\n system_instruction = \"\"\"\n You are an expert researcher. You always stick to the facts in the sources provided, and never make up new facts.\n Now look at these research papers, and answer the following questions.\n \"\"\"\n\n contents = [\n Content(\n role=\"user\",\n parts=[\n Part.from_uri(\n file_uri=\"gs://cloud-samples-data/generative-ai/pdf/2312.11805v3.pdf\",\n mime_type=\"application/pdf\",\n ),\n Part.from_uri(\n file_uri=\"gs://cloud-samples-data/generative-ai/pdf/2403.05530.pdf\",\n mime_type=\"application/pdf\",\n ),\n ],\n )\n ]\n\n content_cache = client.caches.create(\n model=\"gemini-2.5-flash\",\n config=CreateCachedContentConfig(\n contents=contents,\n system_instruction=system_instruction,\n # (Optional) For enhanced security, the content cache can be encrypted using a Cloud KMS key\n # kms_key_name = \"projects/.../locations/us-central1/keyRings/.../cryptoKeys/...\"\n display_name=\"example-cache\",\n ttl=\"86400s\",\n ),\n )\n\n print(content_cache.name)\n print(content_cache.usage_metadata)\n # Example response:\n # projects/111111111111/locations/us-central1/cachedContents/1111111111111111111\n # CachedContentUsageMetadata(audio_duration_seconds=None, image_count=167,\n # text_count=153, total_token_count=43130, video_duration_seconds=None)\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=googlegenaisdk)."]]