The best IBM model for RAG is Granite 4.1 8B — 6.7 intelligence with 131K tokens of context for retrieved passages.
The best AI models for retrieval-augmented generation, ranked by intelligence among models with at least 128K tokens of context — enough to hold retrieved passages plus conversation. RAG pipelines run at volume, so weigh the price and speed columns as hard as the score.
The best IBM model for RAG is Granite 4.1 8B — 6.7 intelligence with 131K tokens of context for retrieved passages.
modelgrep tracks 2 IBM models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by Granite 4.1 8B. 1 of them qualify for this ranking.