{
  "dataset": "models",
  "record": {
    "id": "claude-sonnet-4-6",
    "name": "Claude Sonnet 4.6",
    "vendor": "Anthropic",
    "model_id": "claude-sonnet-4-6",
    "context_window": "1M",
    "max_output": "64K",
    "input_per_mtok": "$3.00",
    "output_per_mtok": "$15.00",
    "strengths": "Best balance of speed and intelligence for high-volume production agents. Adaptive thinking; 1M context.",
    "provider": "Anthropic",
    "family": "Claude Sonnet",
    "release_date": {
      "value": "2026-02-17",
      "source": "https://models.dev/models/anthropic/claude-sonnet-4-6/",
      "last_verified": "2026-06-15",
      "note": "models.dev last_updated/release for claude-sonnet-4-6."
    },
    "last_updated": "2026-06-15",
    "open_weights": {
      "value": false,
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15"
    },
    "license": {
      "value": "proprietary",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15"
    },
    "params_total": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Anthropic does not disclose parameter counts for Claude Sonnet 4.6."
    },
    "params_active": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Anthropic does not disclose parameter counts for Claude Sonnet 4.6."
    },
    "tool_call": {
      "value": true,
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev anthropic/claude-sonnet-4-6: tool_call true."
    },
    "reasoning": {
      "value": "always",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15",
      "note": "Overview: Extended thinking Yes and Adaptive thinking Yes; models.dev reasoning true."
    },
    "structured_output": {
      "value": true,
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev anthropic/claude-sonnet-4-6: structured_output true."
    },
    "attachment": {
      "value": [
        "image"
      ],
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev input modalities: text, image."
    },
    "temperature": {
      "value": true,
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev anthropic/claude-sonnet-4-6: temperature true."
    },
    "knowledge_cutoff": {
      "value": "2025-08-31",
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev knowledge 2025-08-31; Anthropic overview lists reliable knowledge cutoff Aug 2025, training cutoff Jan 2026."
    },
    "context_advertised": {
      "value": "1M",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15"
    },
    "context_effective": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "No published measured long-context recall benchmark for claude-sonnet-4-6; do not derive effective context from advertised."
    },
    "price_input": {
      "value": "$3.00",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15"
    },
    "price_output": {
      "value": "$15.00",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15"
    },
    "price_cache_read": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://platform.claude.com/docs/en/about-claude/pricing — cache-read rate for claude-sonnet-4-6 not captured numerically in fetched sources."
    },
    "price_cache_write": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://platform.claude.com/docs/en/about-claude/pricing — cache-write rate for claude-sonnet-4-6 not captured numerically in fetched sources."
    },
    "cost_per_full_window": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Derived at build: price_input × advertised context (note tiered pricing above 200k tokens per models.dev)."
    },
    "cost_per_agent_task": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Derived at build from the cache-aware agent-task model once cache rates are confirmed."
    },
    "modalities": {
      "value": [
        "text-in",
        "image-in",
        "text-out"
      ],
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15"
    },
    "gpqa_diamond": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — GPQA-Diamond for claude-sonnet-4-6 to confirm at build."
    },
    "swe_bench_verified": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://www.swebench.com/ — SWE-bench Verified score for claude-sonnet-4-6 to confirm at build."
    },
    "terminal_bench": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://www.tbench.ai/ — Terminal-Bench score for claude-sonnet-4-6 to confirm at build."
    },
    "tau2_bench": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Primary τ²-Bench leaderboard — score for claude-sonnet-4-6 to confirm at build."
    },
    "bfcl_tool_use": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://gorilla.cs.berkeley.edu/leaderboard.html — BFCL tool-use score for claude-sonnet-4-6 to confirm at build."
    },
    "aa_index": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — Intelligence Index for claude-sonnet-4-6 to confirm at build."
    },
    "lmarena_elo": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://lmarena.ai/leaderboard — human-preference Elo for claude-sonnet-4-6 to confirm at build."
    },
    "tokens_per_sec": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — measured throughput for claude-sonnet-4-6 (overview Comparative latency: Fast)."
    },
    "ttft": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — measured time-to-first-token for claude-sonnet-4-6 to confirm at build."
    },
    "hallucination_rate": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "No primary hallucination benchmark captured for claude-sonnet-4-6 in this pass."
    },
    "agent_readiness_score": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Score withheld: R_tool, R_ctx, R_cost and R_latency inputs not yet sourced (structured_output IS sourced → R_struct=1.0). Compute per /models/agent-readiness-score once remaining inputs confirmed."
    },
    "score_confidence": "partial",
    "source_url": "https://platform.claude.com/docs/en/about-claude/models/overview",
    "source_type": "provider_card",
    "last_verified": "2026-06-15",
    "max_output_meta": {
      "value": "64K",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15",
      "note": "Overview table: 64k tokens (Messages API). models.dev lists 128k; the Anthropic overview is treated as authoritative and the live record's 64K is preserved."
    }
  }
}