Anthropic new features in June 2026

Everything Anthropic shipped in June 2026: 11 releases, grouped by product, each linked to Anthropic's release notes.

July 2026

GA 2Deprecation 2Update 7

Claude Platform9

Claude PlatformJun 30, 2026

Claude Managed Agents session event streams support event deltas

Opt in with event_deltas[] on the session events stream to receive event_start and event_delta events that preview an agent message's text before the complete agent.message event arrives.

UpdateAI agentsLLMsSQLSource

Claude PlatformJun 30, 2026

Claude Managed Agents session listing adds backward pagination

GET /v1/sessions now returns a prev_page cursor alongside next_page, which can be passed as the page parameter to go back a page.

UpdateAI agentsLLMsDeveloper toolsSource

Claude PlatformJun 30, 2026

Claude Managed Agents sessions can override agent configuration

Passing agent with type agent_with_overrides replaces the model, system prompt, tools, MCP servers or skills for a single session without changing the agent itself.

UpdateAI agentsLLMsMCPSource

Claude PlatformJun 30, 2026

Claude Managed Agents vaults add injection_location for credentials

Environment variable credentials can now be substituted at egress into outbound request headers, the request body or both, controlled by the new injection_location setting.

UpdateAI agentsLLMsSource

Claude PlatformJun 30, 2026

Claude Managed Agents webhooks cover agent and deployment lifecycle events

New agent, deployment and deployment run webhook events let you react to a published agent version, a paused deployment or a failed scheduled run without polling.

UpdateAI agentsLLMsSource

Claude PlatformJun 30, 2026

Claude Sonnet 5 launches with a 1M token context window at $2 / $10 per MTok

Claude Sonnet 5 supports a 1M token context, 128k max output and the same tools as Sonnet 4.6 except Priority Tier. Migrating teams should note that adaptive thinking is on by default and manual extended thinking changes.

GALLMsPricingSource

Claude PlatformJun 29, 2026

Fast mode removed for Claude Opus 4.6

Requests to claude-opus-4-6 with speed fast now run at standard speed and standard rates without erroring, and usage.speed reports the speed used. Migrate to Claude Opus 4.8 to keep fast mode.

DeprecationLLMsPricingSource

Claude PlatformJun 26, 2026

Claude API raises rate limits and consolidates usage tiers into three

Claude Sonnet and Haiku rate limits now match Claude Opus at every tier, and tiers are consolidated into Start, Build and Scale. No organization gets lower limits and no action is required.

UpdateLLMsDeveloper toolsSource

Claude PlatformJun 25, 2026

Anthropic new features in June 2026

Claude Platform9

Claude Managed Agents session event streams support event deltas

Claude Managed Agents session listing adds backward pagination

Claude Managed Agents sessions can override agent configuration

Claude Managed Agents vaults add injection_location for credentials

Claude Managed Agents webhooks cover agent and deployment lifecycle events

Claude Sonnet 5 launches with a 1M token context window at $2 / $10 per MTok

Fast mode removed for Claude Opus 4.6

Claude API raises rate limits and consolidates usage tiers into three

Fast mode for Claude Opus 4.7 deprecated, removal on July 24, 2026

Claude apps1

Claude Sonnet 5 launched

Claude Code1

Trusted Devices requirement for Claude Code Remote Control