EVERY MODEL CHANGE.
ONE SIGNAL.

Inference ​ Serverless pricing update: DeepSeek V4.1 Flash On October 1, 2026 at 00:00 UTC , serverless pricing for DeepSeek V4.1 Flash changes (uncached input / cached input / output price per 1M tokens): Standard: $0.22 / $0.007 / $0.66 → $0.30 / $0.006 / $1.20 Priority: $0.275 / $0.00875 / $0.825 → $0.375 / $0.0075 / $1.50 This adjustment brings our pricing in line with current market rates for this model. It applies only to serverless usage. If you run DeepSeek V4.1 Flash on a dedicated deployment or use Reserved Throughput, your pricing is unaffected. We are also rolling out infrastructure improvements designed to improve cache hit rate, minimize cost per task, and deliver a faster, more reliable experience across the board. See Serverless pricing for the full rate card.

Automatically generate test cases for your prompts using Claude in the Developer Console .

Compare the outputs from different prompts side by side in the new output comparison mode in the Developer Console .

We announced the deprecation of the Claude 1 models. Read more in Model deprecations .

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 .

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.

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 .

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 .

We've added PDF support for use with the new Claude Sonnet 3.5. Read more in PDF support .

Claude Haiku 3.5 is now available on the Claude API as a text-only model.

We've retired the Claude 1 and Instant models. Read more in Model deprecations .

We've added two new Last used at and Cost columns and the ability to sort by any column on the API keys page of the Developer Console .

We've added the ability to group by API key on the Usage and Cost pages of the Developer Console .

We launched a beta version of the Ruby SDK .

Automatically generate test cases for your prompts using Claude in the Developer Console .

Compare the outputs from different prompts side by side in the new output comparison mode in the Developer Console .

We announced the deprecation of the Claude 1 models. Read more in Model deprecations .

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 .

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.

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 .

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 .

We've added PDF support for use with the new Claude Sonnet 3.5. Read more in PDF support .

Claude Haiku 3.5 is now available on the Claude API as a text-only model.

We've retired the Claude 1 and Instant models. Read more in Model deprecations .

We've added two new Last used at and Cost columns and the ability to sort by any column on the API keys page of the Developer Console .

We've added the ability to group by API key on the Usage and Cost pages of the Developer Console .

We launched a beta version of the Ruby SDK .

Automatically generate test cases for your prompts using Claude in the Developer Console .

Compare the outputs from different prompts side by side in the new output comparison mode in the Developer Console .

We announced the deprecation of the Claude 1 models. Read more in Model deprecations .

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 .

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.

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 .

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 .

We've added PDF support for use with the new Claude Sonnet 3.5. Read more in PDF support .

Claude Haiku 3.5 is now available on the Claude API as a text-only model.

We've retired the Claude 1 and Instant models. Read more in Model deprecations .