# Anthropic updates Every Anthropic update in one feed — release notes, features and changes, straight from the source. 59 updates - ## [We’ve deprecated fast mode for Claude Opus 4.8, with removal on November 30, 2026]() Requests to claude-opus-4-8 with speed "fast" will error after removal, and Claude Opus 5.5 supports fast mode with no beta header. 2026-10-30 - ## [We’ve launched the Usage and Cost Analytics API in beta with the analytics-usage-cost-2026-08-24 beta header]() Token usage and cost reporting for Console and Enterprise organizations moves to new endpoints, while the older usage and cost APIs stay supported as legacy. 2026-10-29 - ## [We’ve raised the maximum request size for the Messages API and the Token Counting API from 32 MB to 128 MB on…]() Messages and Token Counting requests on the first-party Claude API can now be four times larger, while partner platforms keep their own limits. 2026-10-28 - ## [Anthropic files S-1 for a Nasdaq IPO under the ticker ANT]() Anthropic filed an S-1 with the SEC for a proposed Nasdaq IPO under the ticker ANT; the share count and price range are not set yet. 2026-10-26 - ## [Anthropic-managed Claude on Google Cloud is now generally available]() Google Cloud customers can now use the full Claude Platform, including Managed Agents and code execution, billed through their Google Cloud account. 2026-10-22 - ## [We've launched Claude Models on Google Cloud (Anthropic managed)]() Anthropic runs the Claude API inside a Google Cloud project, with IAM for access, Marketplace for billing, and fast mode for Opus 5.5. 2026-10-22 - ## [Claude API ships its first new version since 2023]() Anthropic released Claude API version 2026-10-21 and plans more frequent versions. The 2023-06-01 version is not deprecated. 2026-10-21 - ## [We've released API version 2026-10-21]() Python, TypeScript, Go and other SDKs plus the ant CLI move to new major versions, now under Apache 2.0, and user profiles gain enforcement fields. 2026-10-21 - ## [Inference hooks are out of beta for Claude Enterprise organizations]() Claude Enterprise owners can send each governed prompt to their own security server for an allow or deny verdict before the model runs. 2026-10-20 - ## [The Claude Tag API is available in beta for Claude Enterprise organizations with the…]() Enterprise admins can read and change Claude Tag's Slack channel and workspace settings with an Admin API key, in beta. 2026-10-20 - ## [The Compliance API now returns the text each organization member saved as Instructions for Claude in…]() Claude Enterprise admins can read members' saved Instructions for Claude and Cowork Global instructions through a beta Compliance API endpoint. 2026-10-15 - ## [Fast mode is out of research preview for Claude Opus 5.5, and you no longer need to request access]() Opus 5.5 fast mode needs no beta header or access request, and every usage tier now gets a default rate limit. 2026-10-15 - ## [Fast mode for Claude Opus 5.5 is now available on Claude in Microsoft Foundry for deployments hosted on Azure]() Opus 5.5 fast mode is available on Azure-hosted Claude deployments in Microsoft Foundry, which support Global Standard and US Data Zone Standard. 2026-10-15 - ## [We've launched OpenTelemetry export in beta]() SDK tracing supports Python, TypeScript, C#, Go, Java, PHP and Ruby, while admins configure API exports in the Claude Console. 2026-10-14 - ## [You can now let a Claude Managed Agents agent use dynamic workflows]() The beta lets agents run multi-agent programs in the background, with progress events and session budgets to track and cap the work. 2026-10-09 - ## [The Compliance API chat endpoints now also return chats from the unified Claude experience]() The beta is available to Claude Enterprise organizations and works with their existing Compliance Access Key. 2026-10-08 - ## [The Python and TypeScript SDKs now include classes, in beta]() Developers supply their own automation methods, while the SDK handles the tool loop, browser policies and approval callback. 2026-10-07 - ## [Claude Max and Team plans now include monthly API credits]() Max subscribers receive $100 or $200 USD a month, while Team credits are pooled and capped at $500 USD. 2026-10-07 - ## [We've launched Claude Haiku 5.5 (claude-haiku-5-5)]() The model has a 1M token context window, up to 128,000 output tokens and configurable thinking effort. 2026-10-07 - ## [Claude Sonnet 5.5 prompt cache reads cut in half]() Cache reads now cost 0.05x the base input price, while cache writes and all other prices remain unchanged. 2026-10-07 - ## [Claude Managed Agents now applies host rules to search and fetch]() Blocked hosts produce fetch errors and disappear from search results; unrestricted networking and self-hosted environments are unaffected. 2026-10-07 - ## [We've added capabilities.server\_tools to the Models API]() Separate fields distinguish code execution tool support from the ability of running code to call other tools. 2026-10-06 - ## [We've added capabilities.thinking.types.disabled to the Models API]() Both model endpoints report support for turning thinking off, though an incompatible effort level can still cause a request to fail. 2026-10-05 - ## [We've added a line field to the Models API]() Developers can group models in a model picker without parsing IDs, with Claude Opus 4.5 and 4.6 both reporting opus. 2026-10-01 - ## [We announced the deprecation of the Claude Sonnet 4.5 model (claude-sonnet-4-5-20250929)]() Retirement on the Claude API is set for November 30, 2026, and Anthropic recommends moving to Claude Sonnet 5.5. 2026-09-30 - ## [In Python SDK 1.10.0, TypeScript SDK 0.130.0, C# SDK 12.52.0, Go SDK 1.77.0, Java SDK 2.67.0, PHP SDK 0.53.0]() Admin API methods leave beta, and Claude Sonnet 4.5 users must migrate before its November 30 retirement on the Claude API. 2026-09-30 - ## [We've launched Claude Sonnet 5.5 (claude-sonnet-5-5)]() Sonnet 5.5 costs $2/$10 per million tokens and has a 1M context window, but five changes can break code written for Claude Sonnet 5. 2026-09-28 - ## [We're expanding which refusals are billed to include refusals that arrive before any output when…]() Refusals in the bio, frontier\_llm, and reasoning\_extraction categories are now billed even when they arrive before any output. 2026-09-24 - ## [We're resuming billing for refusals that arrive before any output when stop\_details.category is "bio"]() The same September 24 update also removes file and document names from Activity Feed entries and exits beta for Microsoft 365 session logging. 2026-09-24 - ## [Cache diagnostics is out of beta on the Claude API and no longer requires the cache-diagnosis-2026-04-07 beta…]() Cache diagnostics no longer needs a beta header; opting in just requires adding a diagnostics object to a Messages request. 2026-09-23 [Open Anthropic updates on Creators Toolbox]() --- Canonical source: https://creatorstoolbox.com/updates/anthropic