{
  "dataset": "models",
  "record": {
    "id": "claude-haiku-4-5",
    "name": "Claude Haiku 4.5",
    "vendor": "Anthropic",
    "model_id": "claude-haiku-4-5",
    "context_window": "200K",
    "max_output": "64K",
    "input_per_mtok": "$1.00",
    "output_per_mtok": "$5.00",
    "strengths": "Fastest and most cost-effective Claude model — ideal for subagents, classification and latency-critical steps.",
    "provider": "Anthropic",
    "family": "Claude Haiku",
    "release_date": {
      "value": "2025-10-15",
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev anthropic/claude-haiku-4-5 release/last_updated 2025-10-15."
    },
    "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 Haiku 4.5."
    },
    "params_active": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Anthropic does not disclose parameter counts for Claude Haiku 4.5."
    },
    "tool_call": {
      "value": true,
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev anthropic/claude-haiku-4-5: tool_call true."
    },
    "reasoning": {
      "value": "optional",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15",
      "note": "Overview: Extended thinking Yes, Adaptive thinking No; models.dev reasoning true. Reasoning is available but not always-on."
    },
    "structured_output": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://models.dev/api.json — structured_output flag not present on the anthropic/claude-haiku-4-5 entry in the fetched data; confirm against provider card at build."
    },
    "attachment": {
      "value": [
        "image",
        "pdf"
      ],
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev input modalities: text, image, pdf."
    },
    "temperature": {
      "value": true,
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev anthropic/claude-haiku-4-5: temperature true."
    },
    "knowledge_cutoff": {
      "value": "2025-02-01",
      "source": "https://models.dev/api.json",
      "last_verified": "2026-06-15",
      "note": "models.dev knowledge 2025-02-01; Anthropic overview lists reliable knowledge cutoff Feb 2025, training cutoff Jul 2025."
    },
    "context_advertised": {
      "value": "200K",
      "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-haiku-4-5; do not derive effective context from advertised."
    },
    "price_input": {
      "value": "$1.00",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15"
    },
    "price_output": {
      "value": "$5.00",
      "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-haiku-4-5 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-haiku-4-5 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 (200K)."
    },
    "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",
        "pdf-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-haiku-4-5 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-haiku-4-5 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-haiku-4-5 to confirm at build."
    },
    "tau2_bench": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Primary τ²-Bench leaderboard — score for claude-haiku-4-5 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-haiku-4-5 to confirm at build."
    },
    "aa_index": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — Intelligence Index for claude-haiku-4-5 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-haiku-4-5 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-haiku-4-5 (overview Comparative latency: Fastest)."
    },
    "ttft": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — measured time-to-first-token for claude-haiku-4-5 to confirm at build."
    },
    "hallucination_rate": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "No primary hallucination benchmark captured for claude-haiku-4-5 in this pass."
    },
    "agent_readiness_score": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Score withheld: R_tool, R_struct, R_ctx, R_cost and R_latency inputs not yet sourced. Compute per /models/agent-readiness-score once 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. models.dev lists 62k; the Anthropic overview is authoritative and the live record's 64K is preserved."
    }
  }
}