{
  "dataset": "models",
  "record": {
    "id": "claude-opus-4-8",
    "name": "Claude Opus 4.8",
    "vendor": "Anthropic",
    "model_id": "claude-opus-4-8",
    "context_window": "1M",
    "max_output": "128K",
    "input_per_mtok": "$5.00",
    "output_per_mtok": "$25.00",
    "strengths": "Most capable Opus-tier model: state-of-the-art long-horizon agentic execution, knowledge work and memory. 1M context at standard pricing.",
    "provider": "Anthropic",
    "family": "Claude Opus",
    "release_date": {
      "value": "2026-05-28",
      "source": "https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html",
      "last_verified": "2026-06-15",
      "note": "AWS Bedrock model card: 'Model launch date: May 28, 2026'."
    },
    "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 Opus 4.8."
    },
    "params_active": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Anthropic does not disclose parameter counts for Claude Opus 4.8."
    },
    "tool_call": {
      "value": true,
      "source": "https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html",
      "last_verified": "2026-06-15",
      "note": "Bedrock card documents computer-use tool (computer_20251124) and prompt caching over system, messages and tools."
    },
    "reasoning": {
      "value": "always",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15",
      "note": "Overview table: Adaptive thinking Yes; Extended thinking No. Bedrock card lists Reasoning: Supported. Effort defaults to high."
    },
    "structured_output": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://platform.claude.com/docs/en/about-claude/models/overview — schema-guaranteed structured-output flag not explicitly published for claude-opus-4-8 (no models.dev entry yet)."
    },
    "attachment": {
      "value": [
        "image"
      ],
      "source": "https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html",
      "last_verified": "2026-06-15",
      "note": "Bedrock input modalities: Text yes, Image yes; Audio/Speech/Video no."
    },
    "temperature": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://platform.claude.com/docs/en/about-claude/models/overview — temperature-control flag not explicitly stated for claude-opus-4-8."
    },
    "knowledge_cutoff": {
      "value": "2026-01",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15",
      "note": "Reliable knowledge cutoff Jan 2026; training data cutoff Jan 2026 (Bedrock card: 'Knowledge cutoff: January 2026')."
    },
    "context_advertised": {
      "value": "1M",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15",
      "note": "1M tokens on Claude API; 200k on Microsoft Foundry."
    },
    "context_effective": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "No published measured long-context recall benchmark for claude-opus-4-8; do not derive effective context from advertised."
    },
    "price_input": {
      "value": "$5.00",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15"
    },
    "price_output": {
      "value": "$25.00",
      "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-opus-4-8 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-opus-4-8 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 once cache context is confirmed."
    },
    "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://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html",
      "last_verified": "2026-06-15"
    },
    "gpqa_diamond": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://www.anthropic.com/news — benchmark number not captured from a primary leaderboard in this pass."
    },
    "swe_bench_verified": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://www.swebench.com/ — SWE-bench Verified score for claude-opus-4-8 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-opus-4-8 to confirm at build."
    },
    "tau2_bench": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Primary τ²-Bench leaderboard — score for claude-opus-4-8 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-opus-4-8 to confirm at build."
    },
    "aa_index": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — Intelligence Index for claude-opus-4-8 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-opus-4-8 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-opus-4-8 to confirm at build."
    },
    "ttft": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "https://artificialanalysis.ai/ — measured time-to-first-token for claude-opus-4-8 (overview lists Comparative latency: Moderate)."
    },
    "hallucination_rate": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "No primary hallucination benchmark captured for claude-opus-4-8 in this pass."
    },
    "agent_readiness_score": {
      "value": null,
      "verify_status": "verify-against-primary-at-build",
      "source_hint": "Score withheld: R_tool (BFCL/τ²-Bench), R_ctx (effective context), R_cost (cache rates) 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": "128K",
      "source": "https://platform.claude.com/docs/en/about-claude/models/overview",
      "last_verified": "2026-06-15",
      "note": "128k synchronous; up to 300k via output-300k-2026-03-24 beta on the Batches API."
    }
  }
}