Update stale API endpoints and model chains

- Instagram: migrate /v1/ to /v2/ ScrapeCreators endpoint (v1 deprecated Feb 2026)
- OpenAI: switch fallback chain to [gpt-5-mini, gpt-4.1-mini, gpt-4.1] (8x cheaper,
  gpt-5-mini is the first mini model supporting web_search with filters.allowed_domains)
- xAI: use explicit grok-4-1-fast-non-reasoning (bare name aliases to reasoning variant)
- xAI: pass from_date/to_date natively to x_search tool config instead of prompt-only
- Polymarket: correct rate limit comment (15K/10s, not 350/10s)

scripts/lib/instagram.py

@@ -217,7 +217,7 @@ def search_instagram(
 
     try:
         resp = _requests.get(
-            f"{SCRAPECREATORS_BASE}/v1/instagram/reels/search",
+            f"{SCRAPECREATORS_BASE}/v2/instagram/reels/search",
             params={"query": core_topic},
             headers=_sc_headers(token),
             timeout=30,
@@ -228,7 +228,7 @@ def search_instagram(
         _log(f"ScrapeCreators error: {e}")
         return {"items": [], "error": f"{type(e).__name__}: {e}"}
 
-    # Items are in the 'reels' array (ScrapeCreators v1 response)
+    # Items are in the 'reels' array (ScrapeCreators v2 response)
     raw_items = data.get("reels") or data.get("items") or data.get("data") or []
 
     # Limit to configured count

scripts/lib/models.py

@@ -13,8 +13,8 @@ CODEX_FALLBACK_MODELS = ["gpt-5.1-codex-mini", "gpt-5.2"]
 # xAI API - Agent Tools API requires grok-4 family
 XAI_MODELS_URL = "https://api.x.ai/v1/models"
 XAI_ALIASES = {
-    "latest": "grok-4-1-fast",  # Required for x_search tool
-    "stable": "grok-4-1-fast",
+    "latest": "grok-4-1-fast-non-reasoning",  # Explicit: bare grok-4-1-fast aliases to reasoning variant
+    "stable": "grok-4-1-fast-non-reasoning",
 }
 
 

scripts/lib/openai_reddit.py

@@ -8,8 +8,9 @@ from typing import Any, Dict, List, Optional
 from . import http, env
 
 # Fallback models when the selected model isn't accessible (e.g., org not verified for GPT-5)
-# Note: gpt-4o-mini does NOT support web_search with filters param, so exclude it
-MODEL_FALLBACK_ORDER = ["gpt-4.1", "gpt-4o"]
+# gpt-5-mini: $0.25/1M input (8x cheaper than gpt-4.1), supports web_search with filters
+# gpt-4o-mini does NOT support web_search with filters param, so exclude it
+MODEL_FALLBACK_ORDER = ["gpt-5-mini", "gpt-4.1-mini", "gpt-4.1"]
 
 
 def _log_error(msg: str):

scripts/lib/polymarket.py

@@ -1,7 +1,7 @@
 """Polymarket prediction market search via Gamma API (free, no auth required).
 
 Uses gamma-api.polymarket.com for event/market discovery.
-No API key needed - public read-only API with generous rate limits (350 req/10s).
+No API key needed - public read-only API with generous rate limits (15K req/10s).
 """
 
 import json

scripts/lib/xai_x.py

@@ -91,11 +91,11 @@ def search_x(
     # Adjust timeout based on depth (generous for API response time)
     timeout = 90 if depth == "quick" else 120 if depth == "default" else 180
 
-    # Use Agent Tools API with x_search tool
+    # Use Agent Tools API with x_search tool (native date filtering)
     payload = {
         "model": model,
         "tools": [
-            {"type": "x_search"}
+            {"type": "x_search", "from_date": from_date, "to_date": to_date}
         ],
         "input": [
             {