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whit3rabbitandClaude Sonnet 4.6 545bdbbbd3 feat: add bedrock native passthrough, generic passthrough, provider docs, and managed backend fixes

Adds bedrock_native.rs (Converse/InvokeModel with SigV4) and
generic_passthrough.rs catch-all for Translate mode. Adds comprehensive
provider reference docs (docs/providers/, docs/ENDPOINTS.md). Fixes
managed backend admin UI (BackendForm, ManagedBackendsSection) and
admin route/model handler issues. Adds automated model pricing update
workflow (scripts/update_pricing.py, .github/workflows/update-pricing.yml).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-04-08 16:36:16 -05:00

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Anthropic

Claude 3.5, Claude 3, and Claude 4 family. Native Anthropic Messages API passthrough.

LiteLLM prefix: anthropic/
Status: Implemented
Docs: https://docs.anthropic.com/en/api

Authentication

Variable	Required	Description
`ANTHROPIC_API_KEY`	Yes	API key from https://console.anthropic.com/settings/keys

Quick Start

Single-Backend (env vars)

BACKEND=anthropic ANTHROPIC_API_KEY=sk-ant-... cargo run -p anyllm_proxy
# or with Docker:
docker run -e BACKEND=anthropic -e ANTHROPIC_API_KEY=sk-ant-... -e PROXY_OPEN_RELAY=true -p 3000:3000 followthewhit3rabbit/anyllm-proxy

LiteLLM YAML Config

model_list:
  - model_name: claude-3-5-sonnet
    litellm_params:
      model: anthropic/claude-3-5-sonnet-20241022
      api_key: "env:ANTHROPIC_API_KEY"
  - model_name: claude-3-5-haiku
    litellm_params:
      model: anthropic/claude-3-5-haiku-20241022
      api_key: "env:ANTHROPIC_API_KEY"

Usage Examples

Anthropic Messages API

curl http://localhost:3000/v1/messages \
  -H "Content-Type: application/json" \
  -H "x-api-key: $PROXY_API_KEYS" \
  -d '{
    "model": "claude-3-5-sonnet-20241022",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

OpenAI Chat Completions API

curl http://localhost:3000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $PROXY_API_KEYS" \
  -d '{
    "model": "claude-3-5-sonnet-20241022",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Capabilities

Feature	Supported
Chat Completions	✓
Streaming	✓
Tool Use	✓
Embeddings	—
Vision	✓
Batch	✓

Notable Models

Model ID	Context	Max Output	Notes
`claude-opus-4-6-20260205`	200k	32,000	Most capable Claude 4.6, extended thinking
`claude-sonnet-4-6`	200k	16,000	Balanced Claude 4.6, extended thinking
`claude-opus-4-5-20251101`	200k	32,000	High-capability Claude 4.5, extended thinking
`claude-haiku-4-5-20251001`	200k	8,096	Fast Claude 4.5, no extended thinking
`claude-3-7-sonnet-20250219`	200k	16,000	Extended thinking support
`claude-3-5-sonnet-20241022`	200k	8,096	Previous-generation flagship
`claude-3-5-haiku-20241022`	200k	8,096	Fast and affordable
`claude-3-opus-20240229`	200k	4,096	Claude 3 flagship
`claude-3-haiku-20240307`	200k	4,096	Claude 3 fast/cheap tier

Notes

Requests use the AnthropicNative protocol: they are passed through to https://api.anthropic.com without translation. The proxy handles auth and routing only.
Use /v1/messages for the Anthropic format. OpenAI Chat Completions requests are translated before forwarding.
Extended thinking (streaming budget tokens) is supported on claude-3-7-sonnet-20250219 and all Claude 4.x models. Pass thinking: {type: "enabled", budget_tokens: N} in the request body.
Anthropic does not provide an embeddings API. Route embedding requests to a different backend.
Batch requests use /v1/messages/batches and are forwarded directly to the Anthropic batch endpoint.

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