{
 "meta": {
  "title": "LLM API list prices per 1M tokens",
  "notes": "Providers' own published list prices; historical points from dated announcements. OpenAI's flagship output price rose ($30 in 2023 to $50 in 2026) while Anthropic's eased ($75 in 2024 to $50); the mid tier fell to ~$10.",
  "sources": "Provider pricing pages; braiain.com/methodology.html",
  "license": "Compilation CC BY 4.0",
  "as_of": "2026-10-20"
 },
 "columns": [
  "date",
  "provider",
  "model",
  "input_usd_per_1m",
  "output_usd_per_1m",
  "provenance"
 ],
 "rows": [
  [
   "2023-11-06",
   "OpenAI",
   "GPT-4 Turbo",
   10,
   30,
   "verified"
  ],
  [
   "2024-03-04",
   "Anthropic",
   "Claude 3 Opus",
   15,
   75,
   "verified"
  ],
  [
   "2025-04-04",
   "Google",
   "Gemini 2.5 Pro (<=200k)",
   1.25,
   10,
   "press (weaker)"
  ],
  [
   "2026-10-20",
   "OpenAI",
   "GPT-6 Astra",
   10,
   50,
   "list price, page undated"
  ],
  [
   "2026-10-20",
   "OpenAI",
   "GPT-6.1 Sol",
   2,
   10,
   "list price, page undated"
  ],
  [
   "2026-10-20",
   "Anthropic",
   "Claude Fable 5.1",
   10,
   50,
   "list price, page undated"
  ],
  [
   "2026-10-20",
   "Anthropic",
   "Claude Opus 5.5",
   4,
   20,
   "list price, page undated"
  ],
  [
   "2026-10-20",
   "Anthropic",
   "Claude Sonnet 5.5",
   2,
   10,
   "list price, page undated"
  ],
  [
   "2026-10-20",
   "Google",
   "Gemini 4 Argon",
   2,
   10,
   "list price, page undated; $4/$20 from 2026-12-01"
  ]
 ]
}