# Latency-Tolerant Claude API Workloads Not Using the Message Batches API Canonical: https://www.pointfive.co/efficiency-hub/inefficiencies/latency-tolerant-claude-api-workloads-not-using-the-message-batches-api Many Claude API workloads have no user waiting on the answer: evaluation suites, content moderation backlogs, bulk classification and tagging, data... By: PointFive Updated: 2026-09-28 [Cloud Efficiency Hub](https://www.pointfive.co/efficiency-hub) The short version Many Claude API workloads have no user waiting on the answer: evaluation suites, content moderation backlogs, bulk classification and tagging, data extraction, summarization of document sets and generation of product descriptions. PointFive Research Cloud cost research at PointFive Anthropic service [Claude API](https://www.pointfive.co/efficiency-hub/cloud-services/claude-api) Category [AI](https://www.pointfive.co/efficiency-hub/service-category/ai) Reference CER-0504 Type Suboptimal Pricing Model ## Explanation Why the waste happens and who it affects. When these run as ordinary synchronous Messages API calls, every token is billed at the standard rate. The Message Batches API accepts the same requests, processes them asynchronously, and charges 50 percent of standard prices for both input and output tokens. The synchronous API is the default path, so offline jobs written as loops over it pay the standard rate unless someone deliberately moves them. Teams may also assume batching means long delays, although Anthropic states most batches finish in under an hour, with a 24-hour limit. Anthropic's own cost guidance calls batching the second-largest free lever after caching for unattended work such as evaluation runs, backfills and scheduled jobs, and the discount applies to every token of a request, including cached ones. ## Billing model The pricing dimensions that drive this cost. Standard Messages API tokens Input and output tokens billed per million at each model's standard rate Batch tokens All Message Batches usage is charged at 50 percent of standard API prices, for input and output Unbilled batch results Requests that error, are canceled before being sent to the model, or expire after 24 hours are not billed Stacking with caching Prompt caching multipliers apply on top of the batch discount ## How to detect 4 checks to find it in your estate. - Use the Usage and Cost Admin API usage report grouped by service\_tier, model and API key or workspace to see how much volume runs outside the batch tier - Identify callers triggered by schedulers, pipelines, CI evaluation jobs or backfills rather than by interactive users, and compare their volume with batches listed in each workspace - Flag workloads that send thousands of similar requests in loops with client-side concurrency or retry logic, a common sign of batch work done synchronously - Check whether latency requirements for these jobs are measured in hours rather than seconds ## How to fix 4 ways to remove the waste. - Submit offline work through the Message Batches API, with a unique custom\_id per request, and poll or list batches to collect results; each batch can hold up to 100,000 requests or 256 MB - Design for the limits: results arrive when all requests finish or after 24 hours, unfinished requests expire, results can return in any order and stay downloadable for 29 days - Combine batching with prompt caching for shared context, and consider the 1-hour cache duration because batches can take longer than 5 minutes to process - Keep synchronous calls for interactive paths, and for features batches do not support, such as streaming, fast mode and Claude Managed Agents sessions ## Documentation Vendor references for pricing and configuration. - [Batch processing - Claude Platform Docs platform.claude.com](https://platform.claude.com/docs/en/build-with-claude/batch-processing) - [Pricing - Claude Platform Docs platform.claude.com](https://platform.claude.com/docs/en/about-claude/pricing) - [Usage and Cost API - Claude Platform Docs platform.claude.com](https://platform.claude.com/docs/en/manage-claude/usage-cost-api) - [Optimizing for cost and intelligence - Claude Platform Docs platform.claude.com](https://platform.claude.com/docs/en/about-claude/models/optimizing-for-cost-and-intelligence) ## Related inefficiencies [Browse the library](https://www.pointfive.co/efficiency-hub) - Claude API CER-0503 ### [Missing Prompt Caching on the Claude API](https://www.pointfive.co/efficiency-hub/inefficiencies/missing-prompt-caching-on-the-claude-api) Agents, coding assistants, RAG applications and multi-turn chat on the Claude API resend the same long prefix on every request: tool definitions, a system prompt, reference documents and the conversation so far. Without prompt caching,... AI - Claude API CER-0505 ### [Outdated Claude Model Versions on the Claude API](https://www.pointfive.co/efficiency-hub/inefficiencies/outdated-claude-model-versions-on-the-claude-api) Claude API requests are billed at the rate of the model ID they name, and applications usually pin an ID in code or configuration. When Anthropic ships a newer model in the same family, pinned workloads keep running on the older one.... AI - Claude API CER-0506 ### [Using High-Cost Claude Models for Low-Complexity Tasks](https://www.pointfive.co/efficiency-hub/inefficiencies/using-high-cost-claude-models-for-low-complexity-tasks) Routing, classification, tagging, entity extraction, short summarization and similar high-volume tasks are often sent to the same top-tier Claude model that powers an application's hardest agentic work, simply because one model ID is... AI --- Source: the public page above. 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