Vantage Launches the Token Cost Allocation Specification

Vantage has launched the Token Cost Allocation Specification, a provider- and gateway-agnostic standard for associating individual LLM requests and their token usage with business dimensions such as teams, customers, applications, features, and purposes. Available at no added cost to customers with supported provider integrations, the system ingests metadata-only, specification-compliant request logs from customer-owned S3 buckets, matches them with billed costs from OpenAI, Anthropic, AWS Bedrock, Google Cloud Vertex AI, and Azure OpenAI, and proportionally assigns costs according to token usage while preserving provider billing totals. The schema includes required request identifiers, timestamps, provider and model names, and token counts, with optional allocation tags and attributes such as account, region, service tier, and API key ID; it excludes prompts, completions, credentials, and personally identifiable information. Vantage deduplicates logs, handles mismatches between telemetry and provider token counts through proportional allocation or untagged leftover rows, and makes enriched tags available across cost reports, budgets, alerts, filters, virtual tags, and segments. The initial implementation requires newline-delimited, compressed logs stored in date-partitioned S3 paths and read-only access through an existing AWS cross-account role, while native integrations for AI gateways and storage support beyond S3 are planned.

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