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Claude Opus 4.8

Anthropic · Lançado 05/2026

Recomendado

Claude Opus 4.8 is Anthropic's previous-generation Opus, now listed as legacy: 1M-token context, 128K output, $5/$25 per 1M tokens, retirement not before 28 May 2027. It remains our pick for review-heavy work such as code review and constrained refactoring, where deliberate pacing beats persistence. New workloads should start on Claude Opus 5.5 at $4/$20, which Anthropic now recommends.

É adequada para ti?

Bom para

  • Review-heavy engineering work — code review, refactoring under strict constraints, and tasks where deliberate pacing beats raw persistence (our pick for this over Fable 5)
  • Complex analytical reasoning and long-document analysis — 1M-token context holds entire codebases, contracts, or research corpora in a single request
  • Agentic coding on a stable subscription — included in Pro/Max/Team/Enterprise plans, unlike Fable 5's credit-only access
  • Pinned deployments that need a stable model: Anthropic lists Opus 4.8 as legacy but still available, with retirement not sooner than May 28, 2027

Não recomendado para

  • Absolute-longest-horizon autonomous agentic runs — Fable 5 produced 31% fewer dead-end loops on hour-plus tasks in our pipeline
  • Cost-sensitive high-volume production: at $25 per 1M output, batch workloads are cheaper on Sonnet 5 ($2/$10) or Opus 5.5 ($4/$20)
  • New workloads: Anthropic recommends migrating to Claude Opus 5.5, the current Opus model, at $4/$20 per 1M tokens

Desempenho por tarefa

Revisão de código

Excellent

A nossa escolha para trabalho intensivo em revisão — deliberado, respeita restrições, forte a detetar regressões

Codificação agêntica

Very Good

Excelente e incluída na assinatura; o Fable 5 supera-a nas execuções autónomas de horizonte mais longo (menos 31% de ciclos sem saída no nosso pipeline)

Raciocínio de contexto longo

Excellent

Contexto de 1M de tokens lida com bases de código e corpora de documentos completos numa única passagem

Trabalho de conhecimento

Excellent

Raciocínio analítico e síntese de primeira linha para tarefas multi-documento complexas

Preços

Entrada

$5 / 1M tokens

Saída

$25 / 1M tokens

Contexto

1M tokens

Ver preços completos

Testes de desempenho

TestePontuaçãoFonte
SWE-bench Verified79.4% Fonte
MMLU-Pro88.1% Fonte
GPQA Diamond74.8% Fonte

Histórico de veredictos

26/09/2026
recommended -> recommended (summary correction): rating_before=recommended, rating_after=recommended. Summary called Opus 4.8 Anthropic's flagship; Anthropic now lists it as legacy with Opus 5.5 as the current Opus. Rating held pending operator ruling.
15/07/2026
copy edit to brevity standard: detail preserved in children

Registo de verificação

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    Pricing $5/$25 and 1M context match. Anthropic now lists Opus 4.8 as legacy (retirement not before 2027-05-28). Stale prose fixed via model_update. The strength claiming GPT-5.6 Sol 'stays government-gated' was replaced with a legacy/retirement row. The avoid_for row citing 'Sonnet 5 ($3/$15)' now reads $2/$10, matching the live rate card, and adds Opus 5.5 at $4/$20. Added an avoid_for row saying new workloads should use Opus 5.5. pricing_url moved to the platform rate card. The summary called it 'flagship' and 'frontier incumbent'. It was corrected via verdict_set ad01d569, rating_before=recommended and rating_after=recommended; the rating is held pending an operator ruling. Scalars unchanged.

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    Rewrote seed-junk entry in place (slug kept): name 'Claude 4 Opus' -> 'Claude Opus 4.8'; release 2026-05-01 -> 2026-05-28; pricing $15/$75 -> real $5/$25 per 1M (regular); context set to 1M; verdict conditional -> recommended; summary/strengths/audiences/task-ratings/sources fully replaced with sourced Opus 4.8 data. Anchors published post 'Claude Opus 4.8' affected-entity to this slug.

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    Pricing unchanged: $15/$75 per 1M tokens. Now listed as legacy (Opus 4.1) on Anthropic pricing page; current Opus tier is 4.8 at $5/$25.

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    Opus 4 (original) remains at $15/$75 in legacy section. Current model is Opus 4.8 at $5/$25 but entity tracks original Opus 4.

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