Claude Opus 4.8 Fast vs Claude Sonnet 4
Side-by-side comparison. Updated 2026-06-04.
Verdict
Claude Opus 4.8 Fast wins on higher overall score (9.3 vs 8.8, +0.5).
- Larger context window (1000k vs 200k)
At a Glance
| Attribute | Claude Opus 4.8 Fast | Claude Sonnet 4 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Tags | Fast | general |
| Context | 1,000,000 tokens | 200,000 tokens |
| Input price | $10.00/1M | $3.00/1M |
| Output price | $15.00/1M | $15.00/1M |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
Claude Opus 4.8 Fast Strengths
Claude Sonnet 4 Strengths
- Excellent instruction following
- Strong coding ability
- Good reasoning
- Fast inference
- Competitive pricing