{
 "id": "deepseek/deepseek-chat-v3.1",
 "slug": "deepseek-deepseek-chat-v3-1",
 "display": "DeepSeek: DeepSeek V3.1",
 "listed": true,
 "first_seen": "2025-08-25",
 "last_seen": "2026-10-09",
 "observations": 145,
 "repricings": 11,
 "current": {
  "input": 0.25,
  "output": 0.95,
  "blended": 0.425
 },
 "current_since": "2026-09-17",
 "low": {
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  "date": "2025-12-15"
 },
 "high": {
  "value": 0.825,
  "date": "2026-08-22"
 },
 "at_all_time_low": false,
 "new_low": false,
 "change_points": [
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   "blended": 0.35
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  {
   "date": "2026-06-14",
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  {
   "date": "2026-07-14",
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 ],
 "generated": "2026-10-09T11:30:13+00:00",
 "unit": "USD per 1M tokens; blended = (3 * input + output) / 4",
 "source": "OpenRouter public model listing via Wayback Machine snapshots (2023-07 to 2026-04) and LLMPI daily snapshots (2026-06 onward)"
}