Vercel AI Updates: July 6, 2026

1. AI SDK Anthropic Provider Fixes Silently Dropped Thinking Config

Vercel. Vercel shipped @ai-sdk/anthropic@3.0.93, fixing a bug where setting providerOptions.anthropic.thinking = { type: 'disabled' } was accepted by the schema but never forwarded to the Anthropic Messages API. For models with thinking enabled by default, such as Sonnet 5, the ignored setting left reasoning active and could consume the entire max_tokens budget. The patch now passes the disabled value through, letting developers actually turn thinking off and preserve their token allocation for output. Source

2. AI SDK OpenAI and Azure Providers Send Inline Images as Data URLs

Vercel. Vercel released @ai-sdk/openai@4.0.8 alongside a matching @ai-sdk/azure@4.0.8, changing how inline image file parts are transmitted in chat requests. Previously the images were sent as bare base64 strings; the update now wraps them in proper data URLs, such as data:image/jpeg;base64,..., for better alignment with the OpenAI API’s expected format. The fix improves compatibility for applications passing inline images through the AI SDK. Source