Claude Opus 4.8 — Specifications
| Developer | Anthropic |
|---|---|
| Type | LLM (reasoning) |
| Modality | Text, Vision → Text |
| Parameters | Undisclosed |
| Context window | 1M |
| Max output | 128K |
| License | Proprietary |
| Open weights | ❌ No |
| Released | 2026 |
| Input price | $5.00 /1M |
| Output price | $25.00 /1M |
| API providers | Anthropic, AWS, Vertex AI, Azure |
Anthropic’s most capable Opus-tier model — state-of-the-art on long-horizon agentic work, coding, and knowledge tasks. Adaptive thinking only, with a 1M-token context window at standard pricing (no long-context premium).