Claude Opus 4.8 — API Pricing & Benchmarks
Claude Opus 4.8 is Anthropic's previous-generation reasoning model, released in 2026-05. The API costs $5.00 per 1M input tokens and $25.0 per 1M output tokens ($10.0 blended at a 3:1 ratio), with cached input at $0.50. It supports a 1M-token context window. On the independently measured Artificial Analysis Intelligence Index it scores 57.3, ranking #13 of 68 models tracked on this site, with a median output speed of 63 tokens/sec.
Explore provider routes and additional benchmark sources for Claude Opus 4.8
| Provider | Anthropic |
| Input price / 1M tokens | $5.00 |
| Output price / 1M tokens | $25.0 |
| Cached input / 1M tokens | $0.50 |
| Blended price (3:1) | $10.0 |
| Context window | 1M |
| Max output tokens | 128K |
| Knowledge cutoff | 2026-01 |
| License | proprietary |
| Input modalities | T+I |
| Output speed (tok/s) | 63 |
| Released | 2026-05 |
| Artificial Analysis Intelligence Index | 57.3 |
| LMArena Elo | 1461 |
| GPQA Diamond | 92% |
| AIME | 98.3%* |
| SWE-bench Verified | 88.6%* |
| Humanity's Last Exam | 48.7% |
Where Claude Opus 4.8 fits
On a blended 3:1 basis Claude Opus 4.8 costs $10.0 per 1M tokens, cheaper than 8% of the 80 priced models in this index. It is a previous-generation model: usually only worth choosing if you have an existing integration, negotiated pricing, or need its specific behavior, since newer siblings offer better price-performance. Measured output speed of 63 tokens/sec is below the index median of 104 — typical of reasoning-heavy models, and worth checking against interactive latency budgets. Cached input is priced at $0.50 (90% below standard input), which rewards prompt structures with long stable prefixes — see our caching guide.
Price history
| Period | Input $/1M | Output $/1M | Cached $/1M |
|---|---|---|---|
| 2026-07-18 → current | $5.00 | $25.0 | $0.50 |
No list-price changes recorded since tracking began. Full dataset: price-history.json (CC BY 4.0).
Alternatives at a similar price
- Claude Opus 5 (Anthropic) — $10.0/1M blended, AA Index 63.1
- Claude Opus 4.7 (Anthropic) — $10.0/1M blended, AA Index 55
- Claude Opus 4.6 (Anthropic) — $10.0/1M blended, AA Index 44.9
- Claude Opus 4.5 (Anthropic) — $10.0/1M blended, AA Index 41.9
About Anthropic
Anthropic builds the Claude family, organized into Opus (flagship), Sonnet (mid-tier) and Haiku (small) tiers alongside the Fable line. Claude models currently lead the Artificial Analysis Intelligence Index and are particularly strong on agentic-coding benchmarks such as SWE-bench Verified.