# Claude Opus 4.8

Anthropic, released 2026-05-28

**Verdict: recommended.** 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. Last verified 2026-05-28.

## Pricing

- Input: $5 / 1M tokens
- Output: $25 / 1M tokens
- Context: 1M tokens

## Strengths

- 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
- 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

## Benchmarks

- SWE-bench Verified: 79.4% (https://www.anthropic.com/research/swe-bench-opus)
- MMLU-Pro: 88.1% (https://www.anthropic.com/claude)
- GPQA Diamond: 74.8% (https://www.anthropic.com/claude)

## Sources

- [Anthropic pricing page](https://platform.claude.com/docs/en/about-claude/pricing)
- [Anthropic — Claude Opus 4.8 product page](https://www.anthropic.com/claude/opus)
- [Anthropic Pricing](https://www.anthropic.com/pricing)
- [Claude API docs: Claude Opus 4.8 overview (legacy)](https://platform.claude.com/docs/en/models/opus-4-8/overview)
- [Neomanex — Our pick for agentic coding changed (Opus 4.8 stays review-heavy pick)](https://utility.neomanex.com/news/agentic-coding-verdict-fable)

Canonical: https://neomanex.com/models/claude-4-opus