Anthropic Message Batches API vs vLLM

Why the models rank Anthropic Message Batches API — on best batch inference api for large-scale llm processing

“Same 50% batch discount, up to 100k requests per batch, results typically well under the 24h window, and it stacks with prompt caching for very large shared-context workloads (doc corpora, codebases), which can push effective savings past 50%; Claude models' strength on long-context analysis makes it the best value when batch jobs are document-heavy rather than short-prompt. Near-tie with OpenAI — ranking assumes model-agnostic workloads where OpenAI's broader tooling and model menu edge it out.”

Why the models rank vLLM — on best batch inference api for large-scale llm processing

“Dominant open-source engine for high-throughput continuous batching + PagedAttention; delivers 5-10x cost savings vs managed APIs at scale on self-hosted GPUs (e.g. ~$0.3-0.4/M tokens for Llama 70B); broad model support, active development, excellent concurrency scaling and ecosystem integration; top real-world throughput in 2026 benchmarks for batch workloads.”