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AnyRouter

Span-01 Lite

Decisions
respan/span-01-lite

Decision · Sep 2026 · 1 upstreams

Span-01 Lite is Respan's behavior-scoring classifier, the lighter tier of Span-01, a 4B model trained with RLAIF. It takes a conversation span and plain-language behavior definitions and returns a present, absent or not_observable probability per behavior in one forward pass.

Needs your own keyTo use Span-01 Lite, add a key from OpenRouter. AnyRouter adds no fee.
context
—
input
—
output, not token-billed
n/a
question types
noul · choice · score

Upstreams

2
  1. 1OpenRouterYour keynot addedBilled to your key
  2. 2OpenRouterYour keynot addedBilled to your key

Quick start

POST /api/v1/decisions
curl
curl https://anyrouter.dev/api/v1/decisions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "state": "Help! My payouts have been failing for 3 days.",
  "model": "respan/span-01-lite",
  "questions": {
    "is_urgent": {
      "type": "noul",
      "instructions": "Does this convey urgency?"
    }
  }
}'

Details

Owner
Respan
Kind
Decisions
Released
Sep 2026
Data policy
Provider retention
Endpoint
/api/v1/decisions