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POST
Create a message (Anthropic-compatible)

Authorizations

Authorization
string
header
required

Your LITELLM_MASTER_KEY. Default for local Docker Compose: sk-local

Body

application/json
model
string
required

Model alias from config. Available: anthropic/*, gpt-5.5

Example:

"anthropic/*"

messages
object[]
required
Example:
max_tokens
integer
required
Example:

1024

stream
boolean
Example:

false

Response

Message response from upstream provider

id
string
type
string
Example:

"message"

role
string
Example:

"assistant"

content
object[]
model
string
stop_reason
string
Example:

"end_turn"

usage
object