Free API alternatives: free paths in our catalog when a provider has none, or as well as its own

• Free alternatives to Anthropic: inference, 4 alternatives
• Free alternatives to DeepSeek: inference, 4 alternatives
• Free alternatives to xAI: inference, 3 alternatives
• Free alternatives to OpenRouter: inference, 4 alternatives
• Free alternatives to Replicate: inference, 3 alternatives
• Free alternatives to Tavily: search, 4 alternatives
• Free alternatives to Firecrawl: search, 3 alternatives
• Free alternatives to Pinecone: vector-db, 3 alternatives
• Free alternatives to LangSmith: eval-observability, 3 alternatives