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- Best OpenAI-Compatible Proxies Compatible is a claim, not a certification. Where it breaks — streaming, tool calls, schemas, silently ignored parameters — and a test you can run.
- Best AI Agent Frameworks Agent frameworks differ on state, not abstractions. Durable execution, checkpointing, replayable debugging, approval gates, and where MCP fits underneath.
- Best Model Routing and Multi-Provider Tools Four different things get called routing. What failover looks like during a real outage, the stream that dies at token 200, and how routing wrecks your cache.
- Best RAG Frameworks Retrieval quality is a data problem, not a framework problem. Where quality actually comes from, how much framework to accept, and eight options compared honestly.
- Best Vector Databases Recall at a fixed latency budget on your own data is the only metric that matters. Index families, why filtered search quietly collapses, and eleven options compared.
- Best LLM Guardrails and Safety Tools Prompt injection is not solved by any product here. What input and output scanning really do, fail-open versus fail-closed, and eight guardrail tools compared.
- Best Semantic Caching Tools for LLM Apps Semantic caching trades correctness for cost, and the failure is a false hit rather than a miss. The failure classes, the tenancy leak, and seven tools compared.
- Best LLM Evaluation Tools Offline gates and online scoring answer different questions, and LLM-as-judge is unreliable until you calibrate it. Ten evaluation tools, and how to measure the judge.
- Best Prompt Management Platforms Moving prompts out of the repo turns them into a runtime dependency that can change under a shipped binary. The trade-offs, the fetch design, and eight tools.
- Best LLM Cost Tracking and FinOps Tools A provider invoice tells you the total and nothing else. Why per-customer LLM attribution is a call-site tagging problem, and the eight tools that can and cannot solve it.
- Best LLM Observability Tools An LLM trace carries the full prompt, the completion and every tool call, which makes it your most sensitive store. Ten tools compared on capture, redaction and retention.
- LiteLLM Alternatives Four reasons teams move off a self-hosted LiteLLM proxy, each pointing at a different shortlist — plus what LiteLLM still does better than every alternative here.