# Claude Opus 4.8

> Most capable Opus-tier model: state-of-the-art long-horizon agentic execution, knowledge work and memory. 1M context at standard pricing.

_The Frontier Model Matrix · /models/claude-opus-4-8 · [JSON](/api/models/claude-opus-4-8) · [all The Frontier Model Matrix](/models)_

- **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:** 2026-05-28 (source: https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html)
- **last_updated:** 2026-06-15
- **open_weights:** false (source: https://platform.claude.com/docs/en/about-claude/models/overview)
- **license:** proprietary (source: https://platform.claude.com/docs/en/about-claude/models/overview)
- **params_total:** — (verify-against-primary-at-build)
- **params_active:** — (verify-against-primary-at-build)
- **tool_call:** true (source: https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html)
- **reasoning:** always (source: https://platform.claude.com/docs/en/about-claude/models/overview)
- **structured_output:** — (verify-against-primary-at-build)
- **attachment:** image (source: https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html)
- **temperature:** — (verify-against-primary-at-build)
- **knowledge_cutoff:** 2026-01 (source: https://platform.claude.com/docs/en/about-claude/models/overview)
- **context_advertised:** 1M (source: https://platform.claude.com/docs/en/about-claude/models/overview)
- **context_effective:** — (verify-against-primary-at-build)
- **price_input:** $5.00 (source: https://platform.claude.com/docs/en/about-claude/models/overview)
- **price_output:** $25.00 (source: https://platform.claude.com/docs/en/about-claude/models/overview)
- **price_cache_read:** — (verify-against-primary-at-build)
- **price_cache_write:** — (verify-against-primary-at-build)
- **cost_per_full_window:** — (verify-against-primary-at-build)
- **cost_per_agent_task:** — (verify-against-primary-at-build)
- **modalities:** text-in,image-in,text-out (source: https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html)
- **gpqa_diamond:** — (verify-against-primary-at-build)
- **swe_bench_verified:** — (verify-against-primary-at-build)
- **terminal_bench:** — (verify-against-primary-at-build)
- **tau2_bench:** — (verify-against-primary-at-build)
- **bfcl_tool_use:** — (verify-against-primary-at-build)
- **aa_index:** — (verify-against-primary-at-build)
- **lmarena_elo:** — (verify-against-primary-at-build)
- **tokens_per_sec:** — (verify-against-primary-at-build)
- **ttft:** — (verify-against-primary-at-build)
- **hallucination_rate:** — (verify-against-primary-at-build)
- **agent_readiness_score:** — (verify-against-primary-at-build)
- **score_confidence:** partial
- **source_url:** https://platform.claude.com/docs/en/about-claude/models/overview
- **source_type:** provider_card
- **last_verified:** 2026-06-15