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Claude Developer Platform Updates & Release Notes

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119 updates curated from 2 sources by the Releasebot Team. Last updated: May 13, 2026

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  • May 12, 2026
    • Date parsed from source:
      May 12, 2026
    • First seen by Releasebot:
      May 13, 2026
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    Claude Developer Platform by Anthropic

    May 12, 2026

    Claude Developer Platform adds Fast mode support for Claude Opus 4.7, bringing faster output token generation in research preview.

    • Fast mode (research preview) now supports Claude Opus 4.7. Set speed: "fast" with model: "claude-opus-4-7" and the fast-mode-2026-02-01 beta header for significantly faster output token generation at premium pricing. Pricing, rate limits, and access are the same as for Opus 4.6 fast mode; interested customers should join the waitlist.
    Original source
  • May 11, 2026
    • Date parsed from source:
      May 11, 2026
    • First seen by Releasebot:
      May 11, 2026
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    Claude Developer Platform by Anthropic

    May 11, 2026

    Claude Developer Platform launches Claude Platform on AWS with AWS billing, IAM, and native access to core Claude APIs and tools.

    • We've launched Claude Platform on AWS, bringing the Claude API to Anthropic-managed infrastructure accessible through AWS, with AWS billing and IAM authentication. Access the full Messages API, Files API, Message Batches API, Claude Managed Agents, Agent Skills, code execution, and tool use through native AWS endpoints. Learn more in Claude Platform on AWS.
    Original source

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  • May 6, 2026
    • Date parsed from source:
      May 6, 2026
    • First seen by Releasebot:
      May 6, 2026
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    Claude Developer Platform by Anthropic

    May 6, 2026

    Claude Developer Platform adds public beta support for multiagent sessions and outcomes, plus new webhook support for Claude Managed Agents. It also expands vault credential background refresh and adds more filtering and sorting options for sessions and events.

    • Multiagent sessions and Outcomes are now in public beta under the standard managed-agents-2026-04-01 beta header.

    • Vault credential background refresh is now supported for mcp_oauth credentials. See Authenticate with vaults.

    • Webhooks for Claude Managed Agents are now supported. Webhook event types include session and vault lifecycle events. See Subscribe to webhooks.

    • Additional filtering and sorting options are now supported. Sessions can be filtered by status, and events can be filtered by type. Events can now be filtered by creation time.

    Original source
  • Apr 30, 2026
    • Date parsed from source:
      Apr 30, 2026
    • First seen by Releasebot:
      May 1, 2026
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    Claude Developer Platform by Anthropic

    April 30, 2026

    Claude Developer Platform retires the 1M token context beta for Sonnet 4.5 and 4, guiding users to 4.6 models for general availability.

    • We've retired the 1M token context window beta (context-1m-2025-08-07) for Claude Sonnet 4.5 and Claude Sonnet 4. The beta header now has no effect on these models, and requests exceeding the standard 200k-token context window return an error. To use the 1M context window, migrate to Claude Sonnet 4.6 or Claude Opus 4.6, where it's generally available at standard pricing with no beta header required.
    Original source
  • Apr 24, 2026
    • Date parsed from source:
      Apr 24, 2026
    • First seen by Releasebot:
      Apr 25, 2026
    • Modified by Releasebot:
      May 6, 2026
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    Claude Developer Platform by Anthropic

    April 24, 2026

    Claude Developer Platform releases Rate Limits API for admins to programmatically query organization and workspace limits.

    • We've released the Rate Limits API, allowing administrators to programmatically query the rate limits configured for their organization and workspaces.
    Original source
  • Apr 23, 2026
    • Date parsed from source:
      Apr 23, 2026
    • First seen by Releasebot:
      Apr 24, 2026
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    Claude Developer Platform by Anthropic

    April 23, 2026

    Claude Developer Platform adds Memory for Claude Managed Agents in public beta.

    • Memory for Claude Managed Agents is now in public beta under the standard managed-agents-2026-04-01 header. See Using agent memory for the full integration guide.
    Original source
  • Apr 20, 2026
    • Date parsed from source:
      Apr 20, 2026
    • First seen by Releasebot:
      Apr 21, 2026
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    Claude Developer Platform by Anthropic

    April 20, 2026

    Claude Developer Platform retires Claude Haiku 3 and recommends upgrading to Claude Haiku 4.5.

    • We've retired the Claude Haiku 3 model (claude-3-haiku-20240307). All requests to this model will now return an error. We recommend upgrading to Claude Haiku 4.5.
    Original source
  • Apr 16, 2026
    • Date parsed from source:
      Apr 16, 2026
    • First seen by Releasebot:
      Apr 16, 2026
    • Modified by Releasebot:
      Apr 19, 2026
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    Claude Developer Platform by Anthropic

    April 16, 2026

    Claude Developer Platform releases Claude Opus 4.7, its most capable generally available model for complex reasoning and agentic coding, at the same pricing as Opus 4.6. It also expands Claude in Amazon Bedrock to all customers, with Opus 4.7 and Haiku 4.5 available in 27 AWS regions.

    • We've launched Claude Opus 4.7, our most capable generally available model for complex reasoning and agentic coding, at the same $5 / $25 per MTok pricing as Opus 4.6. See What's new in Claude Opus 4.7 for capability improvements, new features, and the updated tokenizer. Opus 4.7 includes API breaking changes versus Opus 4.6; see Migrating to Claude Opus 4.7 before upgrading.

    • Claude in Amazon Bedrock is now open to all Amazon Bedrock customers. Claude Opus 4.7 and Claude Haiku 4.5 are available self-serve from the Bedrock console through the Messages API endpoint at /anthropic/v1/messages, in 27 AWS regions with global and regional endpoints.

    Original source
  • Apr 14, 2026
    • Date parsed from source:
      Apr 14, 2026
    • First seen by Releasebot:
      Apr 15, 2026
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    Claude Developer Platform by Anthropic

    April 14, 2026

    Claude Developer Platform deprecates Claude Sonnet 4 and Claude Opus 4 and points users to newer 4.6 models.

    • We announced the deprecation of the Claude Sonnet 4 model (claude-sonnet-4-20250514) and the Claude Opus 4 model (claude-opus-4-20250514), with retirement on the Claude API scheduled for June 15, 2026. We recommend migrating to Claude Sonnet 4.6 and Claude Opus 4.6 respectively. Read more in model deprecations.
    Original source
  • Apr 9, 2026
    • Date parsed from source:
      Apr 9, 2026
    • First seen by Releasebot:
      Apr 10, 2026
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    Claude Developer Platform by Anthropic

    April 9, 2026

    Claude Developer Platform launches advisor tool public beta for faster agentic workloads with strategic guidance.

    • We've launched the advisor tool in public beta. Pair a faster executor model with a higher-intelligence advisor model that provides strategic guidance mid-generation, so long-horizon agentic workloads get close to advisor-solo quality while the bulk of token generation happens at executor-model rates. Include the beta header advisor-tool-2026-03-01 in your requests.
    Original source
  • Apr 8, 2026
    • Date parsed from source:
      Apr 8, 2026
    • First seen by Releasebot:
      Apr 9, 2026
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    Claude Developer Platform by Anthropic

    April 8, 2026

    Claude Developer Platform launches Claude Managed Agents in public beta and introduces the ant CLI, bringing managed autonomous agents, secure sandboxing, built-in tools, SSE streaming, and faster API workflows with Claude Code integration and YAML resource versioning.

    • We've launched Claude Managed Agents in public beta, a fully managed agent harness for running Claude as an autonomous agent with secure sandboxing, built-in tools, and server-sent event streaming. Create agents, configure containers, and run sessions through the API. All endpoints require the managed-agents-2026-04-01 beta header. Learn more in Claude Managed Agents overview.

    • We've launched the ant CLI, a command-line client for the Claude API that enables faster interaction with the Claude API, native integration with Claude Code, and versioning of API resources in YAML files. Learn more in the CLI reference.

    Original source
  • Apr 7, 2026
    • Date parsed from source:
      Apr 7, 2026
    • First seen by Releasebot:
      Apr 7, 2026
    Anthropic logo

    Claude Developer Platform by Anthropic

    April 7, 2026

    Claude Developer Platform introduces Claude Mythos Preview as a gated research preview for defensive cybersecurity work and brings the Messages API to Amazon Bedrock as a research preview, with a new Claude endpoint on AWS-managed infrastructure and zero operator access.

    • We announced Claude Mythos Preview is available as a gated research preview for defensive cybersecurity work as part of Project Glasswing. Access is invitation-only.

    • The Messages API is now available on Amazon Bedrock as a research preview. The new Claude in Amazon Bedrock endpoint at /anthropic/v1/messages uses the same request shape as the first-party Claude API and runs on AWS-managed infrastructure with zero operator access. Available in us-east-1; contact your Anthropic account executive to request access. Learn more in Claude in Amazon Bedrock.

    Original source
  • Mar 30, 2026
    • Date parsed from source:
      Mar 30, 2026
    • First seen by Releasebot:
      Apr 1, 2026
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    Claude Developer Platform by Anthropic

    March 30, 2026

    Claude Developer Platform raises the Message Batches API max_tokens cap to 300k for Claude Opus 4.6 and Sonnet 4.6, enabling longer outputs for long-form content, structured data, and large code tasks. It also retires the 1M token context beta for older Sonnet models in favor of 4.6.

    • We've raised the max_tokens cap to 300k on the Message Batches API for Claude Opus 4.6 and Sonnet 4.6. Include the output-300k-2026-03-24 beta header to generate longer single-turn outputs for long-form content, structured data, and large code generation tasks.

    • We're retiring the 1M token context window beta for Claude Sonnet 4.5 and Claude Sonnet 4 on April 30, 2026. After that date, the context-1m-2025-08-07 beta header will have no effect on these models, and requests that exceed the standard 200k-token context window will return an error. To continue using 1M context windows, migrate to Claude Sonnet 4.6 or Claude Opus 4.6, which support the full 1M token context window at standard pricing with no beta header required.

    Original source
  • Mar 18, 2026
    • Date parsed from source:
      Mar 18, 2026
    • First seen by Releasebot:
      Mar 19, 2026
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    Claude Developer Platform by Anthropic

    March 18, 2026

    Claude Developer Platform releases updated Models API exposing max_input_tokens, max_tokens, and a capabilities object for each model.

    • We've added model capability fields to the Models API. GET /v1/models and GET /v1/models/{model_id} now return max_input_tokens, max_tokens, and a capabilities object. Query the API to discover what each model supports.
    Original source
  • Mar 16, 2026
    • Date parsed from source:
      Mar 16, 2026
    • First seen by Releasebot:
      Mar 16, 2026
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    Claude Developer Platform by Anthropic

    March 16, 2026

    Claude Developer Platform releases the display field for extended thinking to omit thinking blocks for faster streaming while preserving signature.

    • We've launched the display field for extended thinking, letting you omit thinking content from responses for faster streaming. Set thinking.display: "omitted" to receive thinking blocks with an empty thinking field and the signature preserved for multi-turn continuity. Billing is unchanged. Learn more in Controlling thinking display.
    Original source
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