Model · Anthropic · Text
Claude Opus 4.8
Anthropic's most capable Opus-tier model for complex reasoning, long-horizon agentic coding, and high-autonomy work. The flagship of the standard Claude lineup, succeeding Opus 4.7; Claude Fable 5 sits in a new tier above it.
- Modality
- Text
- License
- Proprietary (Proprietary)
- Context window
- 1,000,000 tokens
- Released
- May 28, 2026
- Last verified
- June 10, 2026
- Runs locally
- No
- Also handles
- vision
Strengths
- Strongest Opus-tier model for nuanced reasoning and long-horizon agentic coding
- 1M-token context with up to 128k output (300k via Batch API beta)
- Adaptive thinking with effort defaulting to high
Weaknesses
- Premium pricing ($5/$25 per MTok; fast mode $10/$50); slower than Sonnet and Haiku tiers
- Closed weights — cannot be self-hosted
Try it
| Where | Type | Notes |
|---|---|---|
| Anthropic API | hosted-api | API key required |
| AWS Bedrock | hosted-api | Enterprise / regional |
| Google Vertex AI | hosted-api | GCP integration |
| Claude.ai | product | Free tier |
Version history
- Claude Opus 4.8 May 2026 Current
- Claude 4.6 Sonnet Feb 2026
- Claude 4.7 Opus Feb 2026 Deprecated
- Claude Haiku 4.5 Oct 2025
Official sources
- Model docs docs
- Announcement announcement
Change log
- — Repositioned as Anthropic's most capable Opus-tier model: Claude Fable 5 launched 2026-06-09 as a new tier above Opus. Opus 4.8 is not superseded and remains the standard-lineup flagship.
- — Initial entry (2026-06-08 catalog refresh, Tier 3). Current flagship Opus, released 2026-05-28; supersedes Claude 4.7 Opus.
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