Add LlamaGate as a new provider (#18673)
Adds LlamaGate (https://llamagate.dev) as an OpenAI-compatible provider with:
- Provider configuration in providers.json
- Documentation page with usage examples
- Model pricing for 17 models across categories:
- General purpose (Llama 3.1/3.2, Mistral, Qwen, Dolphin)
- Reasoning (DeepSeek R1, OpenThinker)
- Code (Qwen Coder, DeepSeek Coder, CodeLlama)
- Vision (Qwen VL, LLaVA, Gemma 3)
- Embeddings (Nomic, Qwen3 Embedding)
Provider details:
- Base URL: https://api.llamagate.dev/v1
- Auth: Bearer token via LLAMAGATE_API_KEY
- Pricing: $0.02-$0.55 per 1M tokens
- All models are open-weights
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