Claude Opus 4.8
Anthropic · Sorti mai 2026
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.
Est-ce fait pour vous ?
Recommandé pour
- 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
Déconseillé pour
- 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
Performances par tâche
Revue de code
Notre choix pour le travail axé sur la revue — délibéré, respectueux des contraintes, performant pour détecter les régressions
Codage agentique
Excellent et inclus dans l'abonnement ; Fable 5 le devance sur les exécutions autonomes de très longue durée (31% de boucles sans issue en moins dans notre pipeline)
Raisonnement en contexte long
Le contexte de 1M tokens gère des codebases entières et des corpus documentaires en un seul passage
Travail de connaissance
Raisonnement analytique et synthèse de premier ordre pour les tâches complexes multi-documents
Tarifs
Entrée
$5 / 1M tokens
Sortie
$25 / 1M tokens
Contexte
1M tokens
Tests de performance
Historique des verdicts
Sources
Journal de vérification
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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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Importé au lancement
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Importé au lancement