Directory · Model comparison
Claude Opus 5 vs Llama 3.1 8B Instruct
Side-by-side API economics and benchmarks. Per-1M input and output rates, context window, and verified metrics.
Tale of the tape
Head-to-head specs pulled from each model profile.
| Metric | Claude Opus 5 | Llama 3.1 8B Instruct |
|---|---|---|
| Input cost / 1M | $5.00 | $0.02 |
| Output cost / 1M | $25.00 | $0.04 |
| Context window | 1,000,000 tokens | 128,000 tokens |
| MMLU score | — | 69.4% |
Cost verdict
Enter monthly input and output volumes to see total cost savings.
Claude Opus 5
- Input: 1M × $5.00 = $5.00
- Output: 1M × $25.00 = $25.00
- Total
- $30.00
Llama 3.1 8B Instruct
- Input: 1M × $0.02 = $0.02
- Output: 1M × $0.04 = $0.04
- Total
- $0.06
Total cost savings
$29.94
Llama 3.1 8B Instruct saves $29.94 per month vs the other model at this volume.
Model routing savings
Uses this page's verified rates. Claude Opus 5 is the premium route (higher combined per-1M cost); Llama 3.1 8B Instruct handles routine traffic.
All premium
Claude Opus 5
$1,500.00
100% of input and output on the premium route
Routed stack
80% → Llama 3.1 8B Instruct
20% → Claude Opus 5
$302.40
- Routine slice
- $2.40
- Premium slice
- $300.00
Monthly savings
$1,197.60
79.8% lower
Rates pulled from this page's model database entries (claude-opus-5, llama-3-1-8b-instruct) — same per-1M input/output figures as Tale of the tape. Production routing needs quality gates and monitoring.
Related comparisons
More head-to-head model matchups.