{
 "slug": "Claude_Opus_4.6",
 "title": "Claude Opus 4.6",
 "type": "model",
 "short_desc": "Anthropic's February 2026 flagship, adding a beta 1M-token context window, adaptive thinking, and effort controls to the Opus line.",
 "categories": [
  "Anthropic models",
  "Models",
  "Reasoning models",
  "2026 model releases"
 ],
 "infobox": {
  "Developer": "Anthropic",
  "Family": "Claude",
  "Announced": "February 5, 2026",
  "Architecture": "Transformer-based hybrid reasoning model; details undisclosed",
  "Parameters": "Undisclosed",
  "Context window": "1,000,000 tokens (beta); up to 128,000 output tokens",
  "Post-training": "Constitutional AI, RLHF-family, reasoning RL",
  "License / access": "Proprietary; API, claude.ai, cloud partners",
  "Paper/report": "Claude Opus 4.6 announcement and system card (February 2026)"
 },
 "infobox_links": {
  "Developer": [
   "Anthropic"
  ],
  "Family": [
   "Claude_(model_family)"
  ],
  "Architecture": [
   "Transformer_(architecture)"
  ],
  "Post-training": [
   "Constitutional_AI",
   "Reinforcement_learning_from_human_feedback"
  ]
 },
 "aliases": [],
 "family": "Claude (model family)",
 "org": "Anthropic",
 "registry_status": "stub",
 "words": 379,
 "references": 3,
 "outbound": [
  "Anthropic",
  "Claude_(model_family)",
  "Claude_4",
  "Claude_Haiku_4.5",
  "Claude_Opus_4.1",
  "Claude_Opus_4.5",
  "Claude_Sonnet_4.5",
  "Claude_Sonnet_5",
  "Constitutional_AI",
  "GPT-5.1",
  "GPT-5.2",
  "Gemini_3",
  "Kimi_K3",
  "Large_language_model",
  "OpenAI",
  "Reinforcement_learning_from_human_feedback",
  "Test-time_compute",
  "Transformer_(architecture)"
 ],
 "inbound": [
  "Activation_steering",
  "Activation_verbalizer",
  "Arcee_AI",
  "Circuits_(interpretability)",
  "Claude_(model_family)",
  "Claude_Opus_4.1",
  "Claude_Opus_4.5",
  "Claude_Opus_4.8",
  "Claude_Sonnet_5",
  "Eliciting_Latent_Knowledge",
  "GLM-5",
  "GPT-5.2",
  "Gemini_3.5",
  "Mechanistic_interpretability",
  "Sparse_autoencoder",
  "Superposition_(interpretability)",
  "Trinity_(model_family)",
  "Trinity_Large",
  "Trinity_Large_Thinking"
 ],
 "url": "wiki/Claude_Opus_4.6.html",
 "built": "2026-07-24"
}