Claude Platform changelog

Conversation kept server-side so later requests send only new messages; threads expire 5 minutes after last requestPreview

Fast mode deprecated, removal November 30, 2026; requests with speed fast will then errorDeprecation

New beta endpoints report token usage and cost; older Usage and Cost API becomes legacy but stays supportedPreview

Maximum request size raised from 32 MB to 128 MB on first-party Claude API

Endpoints read and change Claude Tag settings on Slack channels and workspaces for Enterprise organizationsPreview

Anthropic-operated Claude API reached via Google Cloud project, with IAM access and Marketplace billing; Opus 5.5 fast mGA

New API version with SDK and ant CLI major releases, breaking changes, Apache 2.0 license and enforcement status fieldsDeprecation

Tag API requests by end customer so safety actions apply to one customer, not the whole organization

Out of research preview, no beta header required, with default rate limits in Start, Build and Scale tiersGA

Traces Messages API requests and Managed Agents sessions, with SDK spans in seven languagesPreview

Agents can write dynamic workflows that run many agents in phases and combine resultsPreview

Chat endpoints return unified Claude chats and Docs download as Word files for EnterprisePreview

Launched with 1M token context and 128k max output; Sonnet 5.5 cache reads cut to $0.10 per M tokensGA

adds capabilities.server_tools reporting whether models accept web search and code execution tools

adds capabilities.thinking.types.disabled reporting whether a model accepts thinking set to disabled

adds line field for grouping models; Dreams research preview supports three more models

retirement scheduled for November 30, 2026; Sonnet 5.5 recommended for migrationDeprecation

Launches with five breaking changes from Sonnet 5, including thinking and forced tool useDeprecation

Refusals before output are billed again for bio, frontier_llm and reasoning_extraction categoriesPrice

Out of beta, no beta header required; responses now always include diagnostics fieldGA

1M token context, 128k max output, $4 / $20 per MTok, plus inline tools betaGA

Diagnostics field is always returned, null when unrequested; Compliance API adds Claude in Chrome transcripts in beta

On-demand conversation compaction in beta; input_transformations gains thinking_mismatch_allowed entry typePreview

Adds auto permission policy where the server evaluates tool calls; ant CLI 1.32.0 adds beta:sessions connect

Request fingerprints are stored only when the diagnostics object is sent, not with the beta header aloneDeprecation

Adds ant apply to create and update resources from repository files, with a lockfile

Launched with 1M token context, 128k max output, $10/$50 per MTok, cache reads $0.25 per MTokGA

Files and Skills beta headers dropped in SDKs; Console adds personal and service account keys

Session endpoints leave beta; Admin API added to ant CLI and seven SDKs

Moves to httpx2, requires Python 3.10, removes Text Completions API and sampling parametersDeprecation

Computer use, Files API and Skills leave beta; browser use toolset and domain restrictions addedGA

Workbench renamed playground; supports every Messages API parameter and adds feature templates

Returns transcripts of local Cowork and Claude Code sessions for Claude Enterprise, in betaPreview

$2 / $10 per MTok becomes standard price; September 1 increase to $3 / $15 cancelledPrice

Adds session budgets, advisor models, inference_geo setting and skill loading from GitHub repositories

Beta lets an organization's security server allow or deny prompts before inference; Claude Opus 4.1 retiredDeprecation

Returns Cowork session transcripts for Claude Enterprise organizationsPreview

Research preview adds support for Claude Opus 5

Launched with 1M token context, 128k max output, $5 / $25 per MTok; disabling thinking at xhigh or max errorsDeprecation

Adds effort levels, environment and memory store webhooks, initial session events and thread event deltas

Workbench access ends and experimental prompt tools endpoints are removed on August 17, 2026Deprecation

Available on Claude Fable 5, Mythos 5 and Opus 4.8 with no beta header, correcting earlier notesGA

Manages members, invites, groups and custom roles, in beta for Enterprise organizationsPreview

Adds Claude Fable 5 and Claude Sonnet 5 support; CMEK preservation event docs expanded

API keys and Admin API keys can be given an expiration at creation

agent-memory-2026-07-22 changes memory listing order and replaces managed-agents-2026-04-01Deprecation

Access to both models has been restored

Launched at $2/$10 per MTok with 1M context window; manual extended thinking removedGA

Fast mode removed; requests run at standard speed and rates without errorDeprecation

Sonnet and Haiku limits match Opus at every tier; tiers consolidated into Start, Build, Scale

Deprecated, removal July 24, 2026; migrate to fast mode for Claude Opus 4.8Deprecation

Management API moved from /v1/organizations/tunnels to /v1/tunnels on the Claude APIDeprecation

SDKs support code_execution_20260120 with REPL state persistence, no beta header required

Retired on the Claude API; requests now return an errorDeprecation

New tool versions disclose 90-second cell limit and add response_inclusion parameter

GET /v1/environments/{id}/work endpoint lists pending work for self-hosted sandbox

Launched with 1M-token context, 128k max output, always-on adaptive thinking and safety classifiersGA

Deprecated, with retirement on the Claude API scheduled for August 5, 2026Deprecation

Adds max_tokens to cap advisor output; refusals with no output are no longer billed

Webhooks, multiagent orchestration and self-hosted sandboxes added on Claude Platform on AWS, with new IAM actions

Launches with 1M-token context, 128k max output and mid-conversation system messagesDeprecation

Usage now reports thinking_tokens within output_tokens_details; streaming shows it on final message_delta

MCP tunnels research preview, self-hosted sandboxes, live MCP config updates, large outputs spilled to filePreview

Returns richer SEC filing data for financial research and due-diligence workflows

Beta reports cache_miss_reason on Messages requests via diagnostics.previous_message_idPreview

Research preview adds Opus 4.7 with faster output at premium pricing, waitlist accessPreview

Claude API on Anthropic-managed infrastructure accessible through AWS, with AWS billing and IAM authentication

Multiagent orchestration and Outcomes in beta; adds webhooks, filtering options and Dreams research previewPreview

Short-lived OIDC tokens from your identity provider replace long-lived static API keysGA

1M token context beta retired; requests over 200k tokens now return an errorDeprecation

Open-source Agent Skill with Messages API and Managed Agents reference across 8 languages, bundled with Claude Code

Lets administrators query rate limits set for organization and workspacesGA

Memory added for managed agents under the managed-agents-2026-04-01 headerPreview

Model claude-3-haiku-20240307 retired; requests return an error, Claude Haiku 4.5 recommendedDeprecation

Launched at $5/$25 per MTok, with task budgets in beta, high-resolution images and xhigh effortGA

Deprecated, with retirement on the Claude API scheduled for June 15, 2026Deprecation

Pairs a faster executor model with a higher-intelligence advisor model for guidance mid-generationPreview

Managed agent harness in beta with sandboxing and tools, plus a Claude API command-line clientPreview

Gated research preview for defensive cybersecurity; Messages API on Amazon Bedrock in us-east-1Preview

max_tokens raised to 300k for Opus 4.6 and Sonnet 4.6; 1M context beta retires April 30, 2026Deprecation

Returns max_input_tokens, max_tokens and a capabilities object for each model

New display field omits thinking content from responses for faster streaming; billing unchanged

Out of beta for Opus 4.6 and Sonnet 4.6 at standard pricing; media limit raised to 600GA

Automatic caching added; Sonnet 3.7 and Haiku 3.5 retired, Haiku 3 retires April 20, 2026Deprecation

Balanced model with extended thinking, 1M token context (beta); code execution free with web searchGA

Fast mode in research preview for Claude Opus 4.6, up to 2.5x as fast

Claude Opus 4.6 launched, with compaction API in beta and data residency controls

Structured outputs generally available on Claude API for Sonnet 4.5, Opus 4.5, Haiku 4.5

console.anthropic.com redirects to platform.claude.com

Claude Opus 3 retired; requests now return an errorDeprecation