overview changedrelease-notes/overview
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### April 9, 2025 ### March 31, 2025 ### February 27, 2025 ### February 24, 2025 ### February 10, 2025 ### January 31, 2025 ### January 23, 2025 ### January 21, 2025 ### January 15, 2025 ### January 10, 2025 ### December 19, 2024 ### December 17, 2024 ### December 4, 2024 ### November 21, 2024 ### November 20, 2024 ### November 13, 2024 ### November 6, 2024 ### November 4, 2024 ### November 1, 2024 ### October 22, 2024 ### October 8, 2024 ### October 3, 2024 ### September 10, 2024 ### September 4, 2024 ### August 22, 2024 ### August 19, 2024 ### August 14, 2024 ### July 15, 2024 ### July 9, 2024 ### June 27, 2024 ### June 20, 2024 ### May 30, 2024 ### May 10, 2024 ### April 9th, 2025 ### March 31st, 2025 ### February 27th, 2025 ### February 24th, 2025 ### February 10th, 2025 ### January 31st, 2025 ### January 23rd, 2025 ### January 21st, 2025 ### January 15th, 2025 ### January 10th, 2025 ### December 19th, 2024 ### December 17th, 2024 ### December 4th, 2024 ### November 21st, 2024 ### November 20th, 2024 ### November 13th, 2024 ### November 6th, 2024 ### November 4th, 2024 ### November 1st, 2024 ### October 22nd, 2024 ### October 8th, 2024 ### October 3rd, 2024 ### September 10th, 2024 ### September 4th, 2024 ### August 22nd, 2024 ### August 19th, 2024 ### August 14th, 2024 ### July 15th, 2024 ### July 9th, 2024 ### June 27th, 2024 ### June 20th, 2024 ### May 30th, 2024 ### May 10th, 2024
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644644
645645### August 5, 2025
646646
647* We’ve launched [Claude Opus 4.1](https://www.anthropic.com/news/claude-opus-4-1), an incremental update to Claude Opus 4 with enhanced capabilities and performance improvements.<sup>\*</sup> Learn more in [Models overview](https://platform.claude.com/docs/en/models/overview).
647* We’ve launched [Claude Opus 4.1](https://www.anthropic.com/news/claude-opus-4-1), an incremental update to Claude Opus 4 with enhanced capabilities and performance improvements. Opus 4.1 does not allow both `temperature` and `top_p` parameters to be specified. Use only one. Learn more in [Models overview](https://platform.claude.com/docs/en/models/overview).
648648
649*<sup>\*Opus 4.1 does not allow both `temperature` and `top_p` parameters to be specified. Use only one.</sup>*
650
651649### July 28, 2025
652650
653651* We’ve released `text_editor_20250728`, an updated text editor tool that fixes some issues from the previous versions and adds an optional `max_characters` parameter that allows you to control the truncation length when viewing large files.
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704702
705703* Cache control must now be specified directly in the parent `content` block of `tool_result` and `document.source`. For backwards compatibility, if cache control is detected on the last block in `tool_result.content` or `document.source.content`, it will be automatically applied to the parent block instead. Cache control on any other blocks within `tool_result.content` and `document.source.content` will result in a validation error.
706704
707### April 9th, 2025
705### April 9, 2025
708706
709707* We launched a beta version of the [Ruby SDK](https://github.com/anthropics/anthropic-sdk-ruby).
710708
711### March 31st, 2025
709### March 31, 2025
712710
713711* Our [Java SDK](https://github.com/anthropics/anthropic-sdk-java) has moved from beta to its first stable release.
714712* We’ve moved our [Go SDK](https://github.com/anthropics/anthropic-sdk-go) from alpha to beta.
715713
716### February 27th, 2025
714### February 27, 2025
717715
718716* We’ve added URL source blocks for images and PDFs in the Messages API. You can now reference images and PDFs directly through a URL instead of having to base64-encode them. Learn more in [Vision](https://platform.claude.com/docs/en/build-with-claude/vision) and [PDF support](https://platform.claude.com/docs/en/build-with-claude/pdf-support).
719717* We’ve added support for a `none` option to the `tool_choice` parameter in the Messages API that prevents Claude from calling any tools. Additionally, you’re no longer required to provide any `tools` when including `tool_use` and `tool_result` blocks.
720718* We’ve launched an OpenAI-compatible API endpoint, allowing you to test Claude models by changing just your API key, base URL, and model name in existing OpenAI integrations. This compatibility layer supports core chat completions functionality. Learn more in [OpenAI SDK compatibility](https://platform.claude.com/docs/en/cli-sdks-libraries/libraries/openai-sdk).
721719
722### February 24th, 2025
720### February 24, 2025
723721
724722* We’ve launched [Claude Sonnet 3.7](https://www.anthropic.com/news/claude-3-7-sonnet), our most intelligent model yet. Claude Sonnet 3.7 can produce near-instant responses or show its extended thinking step-by-step. One model, two ways to think. Learn more about all Claude models in [Models overview](https://platform.claude.com/docs/en/models/overview).
725723
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735733 * `text_editor_20250124`: Same functionality as previous version but is independent from computer use. Does not require a beta header.
736734 * `computer_20250124`: Updated computer use tool with new command options including `hold_key`, `left_mouse_down`, `left_mouse_up`, `scroll`, `triple_click`, and `wait`. This tool requires the `computer-use-2025-01-24` anthropic-beta header. Learn more in [Tool use with Claude](https://platform.claude.com/docs/en/agents-and-tools/tool-use/overview).
737735
738### February 10th, 2025
736### February 10, 2025
739737
740738* We’ve added the `anthropic-organization-id` response header to all API responses. This header provides the organization ID associated with the API key used in the request.
741739
742### January 31st, 2025
740### January 31, 2025
743741
744742* We’ve moved our [Java SDK](https://github.com/anthropics/anthropic-sdk-java) from alpha to beta.
745743
746### January 23rd, 2025
744### January 23, 2025
747745
748746* We’ve launched citations capability in the API, allowing Claude to provide source attribution for information. Learn more in [Citations](https://platform.claude.com/docs/en/build-with-claude/citations).
749747* We’ve added support for plain text documents and custom content documents in the Messages API.
750748
751### January 21st, 2025
749### January 21, 2025
752750
753751* We announced the deprecation of the Claude 2, Claude 2.1, and Claude Sonnet 3 models. Read more in [Model deprecations](https://platform.claude.com/docs/en/about-claude/model-deprecations).
754752
755### January 15th, 2025
753### January 15, 2025
756754
757755* We’ve updated [prompt caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching) to be easier to use. Now, when you set a cache breakpoint, we’ll automatically read from your longest previously cached prefix.
758756* You can now prefill Claude’s response when using tools.
759757
760### January 10th, 2025
758### January 10, 2025
761759
762760* We’ve optimized support for [prompt caching in the Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing#using-prompt-caching-with-message-batches) to improve cache hit rate.
763761
764### December 19th, 2024
762### December 19, 2024
765763
766764* We’ve added support for a [delete endpoint](https://platform.claude.com/docs/en/api/messages/batches/delete) in the Message Batches API.
767765
768### December 17th, 2024
766### December 17, 2024
769767
770The following features are now available in the Claude API without a beta header:
768* The following features are now available in the Claude API without a beta header:
771769
772* [Models API](https://platform.claude.com/docs/en/api/models/list): Query available models, validate model IDs, and resolve [model aliases](https://platform.claude.com/docs/en/models/overview) to their canonical model IDs.
773* [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing): Process large batches of messages asynchronously at 50% of the standard API cost.
774* [Token counting API](https://platform.claude.com/docs/en/build-with-claude/token-counting): Calculate token counts for Messages before sending them to Claude.
775* [Prompt Caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching): Reduce costs by up to 90% and latency by up to 80% by caching and reusing prompt content.
776* [PDF support](https://platform.claude.com/docs/en/build-with-claude/pdf-support): Process PDFs to analyze both text and visual content within documents.
770 * [Models API](https://platform.claude.com/docs/en/api/models/list): Query available models, validate model IDs, and resolve [model aliases](https://platform.claude.com/docs/en/models/overview) to their canonical model IDs.
771 * [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing): Process large batches of messages asynchronously at 50% of the standard API cost.
772 * [Token counting API](https://platform.claude.com/docs/en/build-with-claude/token-counting): Calculate token counts for Messages before sending them to Claude.
773 * [Prompt Caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching): Reduce costs by up to 90% and latency by up to 80% by caching and reusing prompt content.
774 * [PDF support](https://platform.claude.com/docs/en/build-with-claude/pdf-support): Process PDFs to analyze both text and visual content within documents.
777775
778We also released new official SDKs:
776* We also released new official SDKs:
779777
780* [Java SDK](https://github.com/anthropics/anthropic-sdk-java) (alpha)
781* [Go SDK](https://github.com/anthropics/anthropic-sdk-go) (alpha)
778 * [Java SDK](https://github.com/anthropics/anthropic-sdk-java) (alpha)
779 * [Go SDK](https://github.com/anthropics/anthropic-sdk-go) (alpha)
782780
783### December 4th, 2024
781### December 4, 2024
784782
785783* We’ve added the ability to group by API key on the [Usage](https://console.anthropic.com/settings/usage) and [Cost](https://console.anthropic.com/settings/cost) pages of the [Developer Console](https://console.anthropic.com).
786784* We’ve added two new **Last used at** and **Cost** columns and the ability to sort by any column on the [API keys](https://console.anthropic.com/settings/keys) page of the [Developer Console](https://console.anthropic.com).
787785
788### November 21st, 2024
786### November 21, 2024
789787
790788* We’ve released the [Admin API](https://platform.claude.com/docs/en/manage-claude/admin-api), allowing users to programmatically manage their organization’s resources.
791789
792### November 20th, 2024
790### November 20, 2024
793791
794792* We’ve updated our rate limits for the Messages API. We’ve replaced the tokens per minute rate limit with new input and output tokens per minute rate limits. Read more in [Rate limits](https://platform.claude.com/docs/en/api/rate-limits).
795793* We’ve added support for [tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/overview) in the [Console Workbench](https://console.anthropic.com/workbench).
796794
797### November 13th, 2024
795### November 13, 2024
798796
799797* We’ve added PDF support for all Claude Sonnet 3.5 models. Read more in [PDF support](https://platform.claude.com/docs/en/build-with-claude/pdf-support).
800798
801### November 6th, 2024
799### November 6, 2024
802800
803801* We’ve retired the Claude 1 and Instant models. Read more in [Model deprecations](https://platform.claude.com/docs/en/about-claude/model-deprecations).
804802
805### November 4th, 2024
803### November 4, 2024
806804
807805* [Claude Haiku 3.5](https://www.anthropic.com/claude/haiku) is now available on the Claude API as a text-only model.
808806
809### November 1st, 2024
807### November 1, 2024
810808
811809* We’ve added PDF support for use with the new Claude Sonnet 3.5. Read more in [PDF support](https://platform.claude.com/docs/en/build-with-claude/pdf-support).
812810* We’ve also added token counting, which allows you to determine the total number of tokens in a Message prior to sending it to Claude. Read more in [Token counting](https://platform.claude.com/docs/en/build-with-claude/token-counting).
813811
814### October 22nd, 2024
812### October 22, 2024
815813
816814* We’ve added Anthropic-defined computer use tools to our API for use with the new Claude Sonnet 3.5. Read more in [Computer use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool).
817815* Claude Sonnet 3.5, our most intelligent model yet, just got an upgrade and is now available on the Claude API. Read more in the [Claude Sonnet documentation](https://www.anthropic.com/claude/sonnet).
818816
819### October 8th, 2024
817### October 8, 2024
820818
821819* The Message Batches API is now available in beta. Process large batches of queries asynchronously in the Claude API for 50% less cost. Read more in [Batch processing](https://platform.claude.com/docs/en/build-with-claude/batch-processing).
822820* We’ve loosened restrictions on the ordering of `user`/`assistant` turns in our Messages API. Consecutive `user`/`assistant` messages will be combined into a single message instead of erroring, and we no longer require the first input message to be a `user` message.
823821* We’ve deprecated the Build and Scale plans in favor of a standard feature suite (formerly referred to as Build), along with additional features that are available through sales. Read more in our [API pricing information](https://claude.com/platform/api).
824822
825### October 3rd, 2024
823### October 3, 2024
826824
827825* We’ve added the ability to disable parallel tool use in the API. Set `disable_parallel_tool_use: true` in the `tool_choice` field to ensure that Claude uses at most one tool. Read more in [Parallel tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/parallel-tool-use).
828826
829### September 10th, 2024
827### September 10, 2024
830828
831829* We’ve added Workspaces to the [Developer Console](https://console.anthropic.com). Workspaces allow you to set custom spend or rate limits, group API keys, track usage by project, and control access with user roles. Read more in our [Workspaces blog post](https://www.anthropic.com/news/workspaces).
832830
833### September 4th, 2024
831### September 4, 2024
834832
835833* We announced the deprecation of the Claude 1 models. Read more in [Model deprecations](https://platform.claude.com/docs/en/about-claude/model-deprecations).
836834
837### August 22nd, 2024
835### August 22, 2024
838836
839837* We’ve added support for usage of the SDK in browsers by returning CORS headers in the API responses. Set `dangerouslyAllowBrowser: true` in the SDK instantiation to enable this feature.
840838
841### August 19th, 2024
839### August 19, 2024
842840
843841* 8,192-token outputs on Claude Sonnet 3.5 are out of beta and no longer require the `max-tokens-3-5-sonnet-2024-07-15` header.
844842
845### August 14th, 2024
843### August 14, 2024
846844
847845* [Prompt caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching) is now available as a beta feature in the Claude API. Cache and re-use prompts to reduce latency by up to 80% and costs by up to 90%.
848846
849### July 15th, 2024
847### July 15, 2024
850848
851849* Generate outputs up to 8,192 tokens in length from Claude Sonnet 3.5 with the new `anthropic-beta: max-tokens-3-5-sonnet-2024-07-15` header.
852850
853### July 9th, 2024
851### July 9, 2024
854852
855853* Automatically generate test cases for your prompts using Claude in the [Developer Console](https://console.anthropic.com).
856854* Compare the outputs from different prompts side by side in the new output comparison mode in the [Developer Console](https://console.anthropic.com).
857855
858### June 27th, 2024
856### June 27, 2024
859857
860858* View API usage and billing broken down by dollar amount, token count, and API keys in the new [Usage](https://console.anthropic.com/settings/usage) and [Cost](https://console.anthropic.com/settings/cost) tabs in the [Developer Console](https://console.anthropic.com).
861859* View your current API rate limits in the new [Rate Limits tab](https://console.anthropic.com/settings/limits) in the [Developer Console](https://console.anthropic.com).
862860
863### June 20th, 2024
861### June 20, 2024
864862
865863* [Claude Sonnet 3.5](https://www.anthropic.com/news/claude-3-5-sonnet), our most intelligent model yet, is now available across the Claude API, Amazon Bedrock, and Vertex AI.
866864
867### May 30th, 2024
865### May 30, 2024
868866
869867* [Tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/overview) is out of beta across the Claude API, Amazon Bedrock, and Vertex AI, with no beta header required.
870868
871### May 10th, 2024
869### May 10, 2024
872870
873871* Our prompt generator tool is now available in the [Developer Console](https://console.anthropic.com). The prompt generator helps you guide Claude to generate high-quality prompts tailored to your specific tasks. Read more in our [prompt generator blog post](https://www.anthropic.com/news/prompt-generator).
874872
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