Contextual AI Reranker v1 Instruct
First instruction-following reranker from Contextual AI; ranks by relevance first and by custom instructions second.
Specs
- Context
- 8K
- Max output
- —
- Input price
- —
- Output price
- —
- Released
- 2025-03-11
Context
- Context window
- 8K
- Max input
- —
- Max output
- —
Pricing
- Not published
Modalities
- Input
- Text
- Output
- Score
API
- API types
Reasoning
- Not published
Info
- Status
- Active
- Released
- 2025-03-11
- Knowledge cutoff
- —
Features
- Not published
How to call
1 provider
contextual-aimodel = ctxl-rerank-v1-instruct
rerank
POSThttps://api.contextual.ai/v1/rerank
JSON
Standard format
{
"id": "ctxl-rerank-v1-instruct",
"object": "model",
"created": 1741651200,
"owned_by": "contextual-ai",
"name": "Contextual AI Reranker v1 Instruct",
"api": {
"types": [
"rerank"
]
},
"limits": {
"context": 8000,
"input": null,
"output": null
},
"modalities": {
"input": [
"text"
],
"output": [
"score"
]
},
"reasoning": {
"supported": null,
"efforts": []
},
"pricing": null,
"features": [],
"info": {
"status": "active",
"release_date": "2025-03-11",
"knowledge_cutoff": null,
"description": "First instruction-following reranker from Contextual AI; ranks by relevance first and by custom instructions second.",
"docs": "https://docs.contextual.ai/api-reference/rerank/rerank",
"verified_at": "2026-10-11"
}
}Official sources
2