Anthropic new features in July 2026

Everything Anthropic shipped in July 2026: 29 releases, grouped by product, each linked to Anthropic's release notes.

June 2026 August 2026

GA 3Preview 1Beta 6Deprecation 3Update 16

Claude Platform22

Claude PlatformJul 24, 2026

Claude API fallbacks parameter adds a default mode for recommended fallbacks

The default mode applies Anthropic's recommended fallback models by refusal category. Server-side fallback is in beta and this mode requires the server-side-fallback-2026-07-01 header.

BetaDeveloper toolsSource

Claude PlatformJul 24, 2026

Claude Opus 5 launches with a 1M token context window at $5 / $25 per MTok

Claude Opus 5 improves on Opus 4.8 with a 1M token context window, 128k max output and thinking on by default, at the same $5 / $25 per MTok price. It is available on the Claude API, Bedrock, Google Cloud and Microsoft Foundry.

GALLMsPricingDeveloper toolsSource

Claude PlatformJul 24, 2026

Claude Opus 5 only allows disabling thinking at effort high or below

Disabling thinking with effort xhigh or max returns a 400 error on Claude Opus 5, a breaking change from Opus 4.8 that integrations should check before migrating.

UpdateLLMsSource

Claude PlatformJul 24, 2026

Effort is the primary control for Claude Opus 5

Claude Opus 5 supports the full effort ladder of low, medium, high, xhigh and max, with max intended for capability-critical work.

UpdateLLMsSource

Claude PlatformJul 24, 2026

Fast mode removed for Claude Opus 4.7

Requests to claude-opus-4-7 with speed fast now return an error rather than falling back to standard speed. The model stays available at standard speed; migrate to Opus 5 or Opus 4.8 to keep fast mode.

DeprecationLLMsSource

Claude PlatformJul 24, 2026

Mid-conversation tool changes enter beta on the Claude API

Add or remove tools between turns while preserving the prompt cache on Claude Fable 5, Mythos 5, Opus 4.8 and Opus 5, using the mid-conversation-tool-changes-2026-07-01 beta header.

BetaLLMsSource

Claude PlatformJul 22, 2026

Claude Managed Agents agent updates no longer require a version field

Supply version for optimistic concurrency, where a mismatch returns 409, or omit it to apply the update unconditionally.

UpdateAI agentsLLMsSource

Claude PlatformJul 22, 2026

Claude Managed Agents agents accept an effort level in model configuration

Pass effort inside the model object when creating a Claude Managed Agents agent to set its effort level.

UpdateAI agentsLLMsDeveloper toolsSource

Claude PlatformJul 22, 2026

Claude Managed Agents sessions can be seeded with initial events

POST /v1/sessions accepts initial_events with up to 50 user.message and user.define_outcome events, and a non-empty list starts the agent loop in the same call.

UpdateAI agentsLLMsSource

Claude PlatformJul 22, 2026

Claude Managed Agents thread event streams support event deltas

The thread-level stream endpoint accepts the event_deltas[] query parameter, so you can preview a subagent's text as the model generates it.

UpdateAI agentsLLMsSQLSource

Claude PlatformJul 22, 2026

Claude Managed Agents webhooks cover environment and memory store lifecycle

Four environment.* and three memory_store.* webhook event types let you react to environment and memory store lifecycle changes without polling.

UpdateAI agentsLLMsSource

Claude PlatformJul 17, 2026

Claude experimental prompt tools APIs retire with the Workbench on August 17, 2026

The generate_prompt, improve_prompt and templatize_prompt experimental endpoints are being retired along with the Workbench on August 17, 2026, after which requests will return an error.

DeprecationSource

Claude PlatformJul 17, 2026

Legacy Claude Console Workbench sunsets on August 17, 2026

Access to the legacy Workbench ends August 17, 2026, and saved prompts, variables and evals are not supported in the updated Workbench. Export any data you want to keep from the banner or Organizational Settings.

DeprecationLLMsSource

Claude PlatformJul 15, 2026

Mid-conversation system messages available on Claude Fable 5, Mythos 5 and Opus 4.8

Mid-conversation system messages work on Claude Fable 5, Mythos 5 and Opus 4.8 on the Claude API, Amazon Bedrock and Google Cloud with no beta header required, correcting earlier availability notes.

GALLMsDeveloper toolsSource

Claude PlatformJul 14, 2026

Admin API adds Claude Enterprise user management in beta

Claude Enterprise organizations can list and look up members, change roles, remove members, manage invites and groups, and read custom roles through the Admin API. Group and custom-role requests need the ce-user-management-2026-07-13 beta header.

BetaLLMsDeveloper toolsSource

Claude PlatformJul 14, 2026

Self-serve HIPAA configuration for Claude Enterprise and the Claude API

Eligible admins can now review the BAA, download the implementation guide, and enable the HIPAA configuration in a single flow, for both Claude Enterprise and the Claude Platform (API).

UpdateLLMsDeveloper toolsSource

Claude PlatformJul 10, 2026

Claude Access Transparency docs expand coverage of cmek_preserve events

Documentation for cmek_preserve events now includes a filter example, an example payload and two preservation reason codes, and clarifies that events are written whether a human reviewer or an automated safety pipeline initiated preservation.

UpdateGovernanceData integrationSource

Claude PlatformJul 10, 2026

Dreams research preview adds Claude Fable 5 and Claude Sonnet 5

Dreams, in research preview, now supports Claude Fable 5 and Claude Sonnet 5.

PreviewLLMsSource

Claude PlatformJul 8, 2026

Claude Console API keys and Admin API keys can now expire

Choose a preset, custom duration or Never when creating a key, and keys with a lifetime of at least 7 days trigger an email before expiry. The Admin API reports expiration in expires_at; existing keys are unaffected.

UpdateLLMsDeveloper toolsSource

Claude PlatformJul 2, 2026

Claude SDKs switch memory store calls to the agent-memory-2026-07-22 header

Python 0.116.0, TypeScript 0.110.0, Go 1.56.0, Java 2.48.0, Ruby 1.55.0, PHP 0.36.0, C# 12.35.0 and CLI 1.16.0 send agent-memory-2026-07-22 on memory store calls. Code passing betas explicitly should replace managed-agents-2026-04-01.

UpdateAI agentsDeveloper toolsSource

Claude PlatformJul 2, 2026

agent-memory-2026-07-22 beta header changes memory store listing behavior

With the new header, listing memories returns a stable server-defined order, depth accepts only 0 or 1, and path_prefix must end with / and match whole segments. Page cursors issued without the header are not valid with it.

BetaAI agentsCoding agentsSource

Claude PlatformJul 1, 2026

Access to Claude Fable 5 and Claude Mythos 5 is restored

Anthropic has restored access to Claude Fable 5 and Claude Mythos 5 and published a statement with more information.

UpdateLLMsSource

Claude apps7

Claude appsJul 24, 2026

Claude Opus 5 launched

Anthropic launched Claude Opus 5, which it says comes close to the frontier intelligence of Claude Fable 5 at half the price.

GALLMsPricingSource

Claude appsJul 10, 2026

Memory reworked into individual categorized entries

Memory on Claude now works as a set of individual, categorized entries that Claude reads and updates during conversations, replacing the previous daily memory summary.

UpdateLLMsSource

Claude appsJul 9, 2026

Monthly recap in Settings > Reflect (beta), plus break reminders and quiet hours

A monthly recap at Settings > Reflect shows topics, most active day, peak hour, and observations; it is in beta on Free, Pro, and Max plans on web and Desktop. Settings > Time and focus adds optional break reminders and quiet hours.

BetaPricingSource

Claude appsJul 7, 2026

Claude Cowork available on web and mobile, with remote sessions in beta

Claude Cowork is now available on web and mobile in addition to desktop, rolling out starting with the Max plan. Cowork runs sessions remotely (in beta), so sessions and files are saved to the Claude account and scheduled tasks run with no device online.

UpdateLLMsPricingSource

Claude appsJul 7, 2026

Write tools for the Microsoft 365 connector (email, calendar, OneDrive, SharePoint)

With write tools enabled, Claude can draft, send, and organize email, manage calendar events, update mailbox settings, and create and update files in OneDrive and SharePoint. Teams remains read-only and admin consent is required.

UpdateLLMsData integrationSource

Claude appsJul 1, 2026

Access to Claude Fable 5 and Claude Mythos 5 restored

Anthropic is restoring access to Claude Fable 5 and Claude Mythos 5.

UpdateLLMsSource

Claude appsJul 1, 2026

Model entitlements for Enterprise plans (beta)

Admins on Enterprise plans can now control which models their users can access and which effort level settings they can use.

BetaPricingSource