Is Cohere Rerank 5 state of the art?Pending benchmarks.Announced Oct 21, 2026; no independent results yet.
Cohere's fifth-generation reranking models for search, RAG and agents, in Pro (highest quality) and Fast (low latency, high throughput) tiers. New in this version: Context Focus, which returns the most relevant passages inside each document in the same call, and calibrated relevance scores. Text input, 32K context, 100+ languages. API only, no open weights.
The details so far
- Lab
- Cohere
- Announced
- Oct 21, 2026
- API
- Live · rerank-v5.0-pro
- Open weights
- Closed
- Parameters
- About 2B (Pro), about 500M (Fast)
- Models
- rerank-v5.0-pro and rerank-v5.0-fast
- Context
- 32,768 tokens, query and document combined
- Output
- Documents ranked by relevance with a calibrated 0–1 score; optional Context Focus returns scored character spans
- Input
- Text; JSON, tables and records passed as YAML strings; 100+ languages
- Price
- $0.05 per 1M tokens (Pro), $0.02 per 1M tokens (Fast)
- Availability
- Cohere API, Model Vault, Microsoft Foundry, Amazon SageMaker, North, and private VPC or on-premises deployments
Tags marked unsure are not stated on the lab's own pages.
What would let us call it
Verdicts use only independent boards we already track. Two consecutive snapshots are required before any crown.
- Publicly announced with a source
- Usable by the public (API or weights)
- Listed on an independent board we track
- Enough results for a rank in a category
- Holds across two snapshots (crowns only)
What the lab claims
Self-reported. Shown for context; not used in any verdict.
Lab claim: Rerank 5 Pro scores 82.2 on BRIGHT, 5.8 points above Voyage AI Rerank 3 and 12.4 above Rerank 4 Pro, and was first on 39 of 46 composite datasets in Cohere's evaluation (RCP-nDCG@10, a Cohere-developed metric).
Lab claim: Rerank 5 Fast reranks about 187 documents of 1,000 tokens per second on one NVIDIA A100, 2.9× Pro's throughput, and beats Rerank 4 Pro.
Sources
LABIntroducing Rerank 5 (Cohere blog)cohere.com/blog/rerank-5 · Oct 21, 2026LABRerank documentation (Cohere)docs.cohere.com/docs/rerank · Oct 21, 2026LABCohere announcement on Xx.com/cohere/status/2112923503100125326 · Oct 21, 2026Tracking continues until an independent board lists it.