{
  "model": "claude-sonnet-5",
  "context_tokens": 1000000,
  "max_output_tokens": 128000,
  "input_microusd_per_token": 4,
  "output_microusd_per_token": 10,
  "observed_on": "2026-09-27",
  "source": "https://platform.claude.com/docs/en/models/sonnet-5/whats-new-sonnet-5",
  "pricing_source": "https://platform.claude.com/docs/en/about-claude/pricing",
  "scope": "First-party global standard Messages; input bound covers one-hour cache creation. No inference_geo, service_tier, speed, server tools or other extra-fee request fields admitted by transport. Snapshot for review, not authority or a future tariff guarantee.",
  "observed_cli_max_tokens": 64000,
  "required_request_betas": [
    "claude-code-20250219",
    "interleaved-thinking-2025-05-14",
    "thinking-token-count-2026-05-13",
    "context-management-2025-06-27",
    "prompt-caching-scope-2026-01-05",
    "mid-conversation-system-2026-04-07",
    "effort-2025-11-24"
  ],
  "cli_shape_evidence": "2026-09-27-sonnet5-runtime-proof.json"
}