[Bug]: anthropic extended thinking not working with extended thinking + "output-128k-2025-02-19"

[xingyaoww]

What happened?

Got this error AFTER i tried to extend to 128k window with sonnet 3.7

Here's the script for repro (too long to put in log output)
test_llm_think.txt

litellm.exceptions.BadRequestError: litellm.BadRequestError: AnthropicException - {"type":"error","error":{"type":"invalid_request_error","message":"messages.1.content.0.type: Expected `thinking` or `redacted_thinking`, but found `text`. When `thinking` is enabled, a final `assistant` message must start with a thinking block (preceeding the lastmost set of `tool_use` and `tool_result` blocks). We recommend you include thinking blocks from previous turns. To avoid this requirement, disable `thinking`. Please consult our documentation at https://docs.anthropic.com/en/docs/build-with-claude/extended-thinking"}}

Relevant log output

See attached script

Are you a ML Ops Team?

No

What LiteLLM version are you on ?

branch = "litellm_dev_03_03_2025_p3" commit = "a1a711abfa120e62944c3639620c6bce96671ba5"

Twitter / LinkedIn details

No response

[xingyaoww]

OK confirmed this issue still happens with latest main!