Claude Opus 4.8 vs Claude Opus 5: API Pricing & Benchmarks
Claude Opus 4.8 vs Claude Opus 5 — or, searched the other way round, Claude Opus 5 vs Claude Opus 4.8: official API prices, what the same workload costs on each, and every published benchmark score, side by side. Every figure comes straight from the data below; this page does not pick a winner.
Price per 1M tokens
| Claude Opus 4.8 | Claude Opus 5 | |
|---|---|---|
| Input | $5.00 | $5.00 |
| Output | $25.00 | $25.00 |
| Blended | $10.00 | $10.00 |
| Developer | Anthropic | Anthropic |
| Released | 2026-05-28 | 2026-07-24 |
Prices: official list prices as recorded by models.dev (Claude Opus 4.8) and models.dev (Claude Opus 5).
Cost of the same workload
| Workload | Tokens | Claude Opus 4.8 | Claude Opus 5 | Difference |
|---|---|---|---|---|
| Short chat reply | 500 in / 300 out | $0.0100 | $0.0100 | Same cost |
| RAG query | 4,000 in / 500 out | $0.0325 | $0.0325 | Same cost |
| Long document summary | 50,000 in / 1,000 out | $0.2750 | $0.2750 | Same cost |
| Code review of a 2k-line file | 30,000 in / 2,000 out | $0.2000 | $0.2000 | Same cost |
| 1,000 chat replies/day for 30 days | 30,000 × (500 in / 300 out) | $300.00 | $300.00 | Same cost |
Cost = (input tokens ÷ 1,000,000 × input price) + (output tokens ÷ 1,000,000 × output price), using each model's own prices above.
Benchmarks
| Benchmark | Claude Opus 4.8 | Claude Opus 5 |
|---|---|---|
| Epoch Capabilities Index (ECI) | 159.9 epoch · as of 2026-05-28 |
164.4 epoch · as of 2026-07-24 |
| Epoch Mock AIME accuracy | 98.3% epoch · as of 2026-05-28 |
98.9% epoch · as of 2026-07-24 |
| Epoch FrontierMath (T1–3) accuracy | 80.0% epoch · as of 2026-05-28 |
85.6% epoch · as of 2026-07-24 |
| Arena text rating | 1474 arena · as of 2026-10-28 |
1492 arena · as of 2026-10-28 |
| Arena coding rating (human preference votes, not task accuracy) | 1529 arena · as of 2026-10-28 |
1534 arena · as of 2026-10-28 |
| Arena math rating | 1477 arena · as of 2026-10-28 |
1521 arena · as of 2026-10-28 |
| Arena WebDev rating | 1536 arena · as of 2026-10-28 |
1691 arena · as of 2026-10-28 |
Full pages
Claude Opus 4.8 pricing Claude Opus 5 pricing Claude Opus 4.8 token counter Claude Opus 5 token counter
FAQ
Which is cheaper, Claude Opus 4.8 or Claude Opus 5?
They have the same blended price: $10.00 per 1M tokens.
How do the input and output prices of Claude Opus 4.8 and Claude Opus 5 compare?
Claude Opus 4.8 costs $5.00 per 1M input tokens and $25.00 per 1M output tokens. Claude Opus 5 costs $5.00 per 1M input tokens and $25.00 per 1M output tokens.
What are the ECI scores of Claude Opus 4.8 and Claude Opus 5?
Claude Opus 4.8 scores 159.9 on the Epoch Capabilities Index (ECI); Claude Opus 5 scores 164.4 on the Epoch Capabilities Index (ECI).
Where does the Claude Opus 4.8 vs Claude Opus 5 comparison data come from?
Prices come from models.dev and LiteLLM (open MIT-licensed catalogs); benchmark scores come from Epoch AI and LMArena (open CC BY 4.0 datasets). This page states the numbers side by side and does not pick an overall winner — see /data-sources/.