🟡 404 Error for Claude Model 4.6 on Vertex AI
# questionsa
arafat
03/05/2026, 10:33 PMgetting 404 for claud model 4.6 opus on vertex ai provider requested URL /v1/projects/xxxxxxxxxx/locations/global/publishers/anthropic/models/claude-opus-4-6:streamRawPredict was not found on this server. That’s all we know. , statuscode=404, detailed_message=3 failed attempts:
Attempt 0: LLM client "CustomClaudeOpus46" failed with status code: Unspecified error code: 404 Message: Request failed with status code: 404 Not F
arafat
03/05/2026, 10:34 PMmy client client CustomClaudeOpus46 {
provider vertex-ai
retry_policy Exponential
options {
model "claude-opus-4-6"
anthropic_version "vertex-2023-10-16"
base_url "https://global-aiplatform.googleapis.com/v1/projects/xxxxxx/locations/global/publishers/anthropic/models"
// Don't need to specify location when using explicit base_url
// Don't need project_id when it's in the base_url
}
}
arafat
03/05/2026, 10:35 PMi am on 0.210.0
arafat
03/05/2026, 11:45 PMthis is provided in your docs but does not work
arafat
03/05/2026, 11:45 PMonly way it works if i hard code my project_id that is not a good option please help with this
arafat
03/05/2026, 11:54 PMi ended creating and env variable for the full base url you should update your docs
arafat
03/05/2026, 11:54 PMis generationConfig {
thinkingConfig {
includeThoughts true
}
} only works in gemini , is it supported in claude i get an error for it
v
Vaibhav (BAML 🐑)
03/06/2026, 6:32 AMthansk for sharing this, sorry about that lack of update on docs here
Vaibhav (BAML 🐑)
03/06/2026, 6:32 AMWe had people out of discord today! apologies for the delay here 🙁
Vaibhav (BAML 🐑)
03/06/2026, 8:16 AMdocs updated as well! https://github.com/BoundaryML/baml/pull/3214
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