Claude Opus 4.8 vs Claude Sonnet 4.6
Claude Opus 4.8 edges ahead on overall intelligence (RunFree 94.7 vs 66.2). Here's how they stack up on benchmarks, price and specs.
Claude Opus 4.8
Anthropic
Claude Sonnet 4.6
Anthropic
Shared benchmarks (4)
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| Claude Opus 4.8 | Claude Sonnet 4.6 | |
|---|---|---|
| RunFree Score | 94.7 | 66.2 |
| Blended price / 1M | $10.00 | $6.00 |
| Input / 1M | $5.00 | $3.00 |
| Output / 1M | $25.00 | $15.00 |
| Context window | 1M | 1M |
| Max output | 128K | 128K |
| Reasoning model | Yes | Yes |
| GPQA Diamond | 93.6% | 89.9% |
| Humanity's Last Exam | 49.8% | 33.2% |
| SWE-Bench Verified | 88.6% | 79.6% |
| Terminal-Bench | 74.6% | 59.1% |
| Wins | 5 | 3 |
A blank means the metric is tied or one model has no verified data. Prices are blended 3:1 input:output.
Compare more: Claude Opus 4.8 card · Claude Sonnet 4.6 card · full leaderboard