npm / @ai-sdk/deepseek

@ai-sdk/deepseek

What changed in @ai-sdk/deepseek 1 to 3, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-18.

12 new APIs and options1 behavior and defaults12 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

@ai-sdk/deepseek 323 changes

Adds max as a portable reasoning level, with native provider mappings, compatibility coercions, and budget-based fallback support.
3.0.60release notes
provider-utils adds deleteFromApi.
3.0.38release notes
FilesV4 call options now support abortSignal.
3.0.38release notes
FilesV4 gains an optional deleteFile operation.
3.0.38release notes
FilesV4 gains an optional streaming downloadFile operation.
3.0.38release notes
FilesV4 gains an optional getFileMetadata operation.
3.0.38release notes
FilesV4 call options now support headers.
3.0.38release notes
provider-utils adds postMultipartStreamToApi for streaming multipart uploads with deterministic part ordering and failure-path stream teardown.
3.0.38release notes
Upload data now accepts a { type: 'stream' } variant.
3.0.38release notes
Upload results now expose byteSize.
3.0.38release notes
Upload results now expose createdAt.
3.0.38release notes
Upload results now expose expiresAt.
3.0.38release notes

Preserves reasoning content on all assistant turns for future DeepSeek models, using current reasoning-enabled defaults; known pre-V4 versions and legacy chat/reasoner aliases retain previous handling.
1.0.63, 2.0.72, 3.0.64release notes release notes release notes

Fixes cached input token reporting for OpenAI-compatible DeepSeek responses.
1.0.61, 2.0.70, 3.0.57release notes release notes release notes
Uses a standards-compliant User-Agent header.
3.0.56release notes
Fixes streamed tool calls with missing, blank, or repeated IDs.
3.0.55release notes
Tool-result images are now sent as image content parts.
3.0.50release notes
Non-streaming responses without choices now return a typed error.
3.0.49release notes
The deepseek-flash alias is treated as a V4 model so prior-turn reasoning_content is preserved in multi-turn requests.
2.0.64, 3.0.44release notes release notes
Preserves reasoning streams across empty tool-call deltas.
1.0.57, 2.0.64, 3.0.43release notes release notes release notes
The core uploadFile() helper now forwards abortSignal.
3.0.38release notes
The core uploadFile() helper now forwards headers.
3.0.38release notes
Preserves complete raw chat usage objects.
3.0.35release notes

Complete raw chat usage objects are now preserved, so developers retain all usage data.
2.0.61release notes

Treats the deepseek-flash alias as a V4 model so prior-turn reasoning_content is preserved in multi-turn requests.
1.0.57release notes