Anthropic: Claude Opus 4.8 (Fast)
Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Everything else
| Max output | 128K |
|---|---|
| Input / 1M | $10 |
| Output / 1M | $50 |
| Cache read / 1M | $1 |
| Cache write / 1M | $12.50 |
| 1M in + 1M out | $60 |
| Takes | text, image, file |
| Returns | text |
| Tools | yes |
| Reasoning | optional · max, xhigh, high, medium, low |
| Open weights | no |
| Released | 2026-05-27 |
| Knowledge cutoff | — |
| Retires | — |
| Catalog id | anthropic/claude-opus-4.8-fast |
Using it
In 00, this model is picked per agent — and per tier, so the model that answers your customers need not be the one that writes your code. Get 00.