Anthropic Expands Claude API Payload Capacity to 128 MB
In short: The first-party Claude API now supports larger data submissions through its Messages and Token Counting endpoints. Developers can now send requests up to 128 MB, a substantial upgrade from the previous 32 MB cap.
This summary was generated automatically by AI from Claude Platform Release Notes's publication. It is our own text, not a copy of the original — facts, figures and quotes belong to the source, linked above and below.
What changed?
- 1Payload limit expanded to 128 MB for Messages and Token Counting APIs.
| Parameter | Before | Now |
|---|---|---|
| Maximum Request Size | 32 MB | 128 MB |
Why it matters
This update provides more headroom for developers handling extensive documentation or long-form conversational history. It simplifies architecture for systems that previously had to split large data payloads to avoid hitting API limitations.
What it means for AI agents and contact centers
For your voice agents, this simplifies the handling of very long audio transcripts or multi-turn call logs without needing to chunk data as aggressively, potentially streamlining your ingestion pipelines and state management.
🧪 Worth Testing
Verify if your current message formatting or data structures can be consolidated into single requests to reduce latency and infrastructure complexity.
Sources
- Claude Platform Release NotesOfficialPrimary sourceOriginal article →„We’ve raised the maximum request size for the Messages API and the Token Counting API from 32 MB to 128 MB on the first-party Claude API.“28 Oct 2026, 02:00
- Published by source
- 28 Oct 2026, 02:00
- Found by our system
- 29 Oct 2026, 19:54
- Summary generated
- 29 Oct 2026, 20:25
This article was written by AI from the original source. Facts, numbers and prices come from the source; missing values are marked “Not specified”. Legal notice, copyright and privacy