Claude Opus 4.8 vs Claude Sonnet 5
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, Claude Sonnet 5 is cheaper by about $1,050.00/month.
| Claude Opus 4.8 | Claude Sonnet 5 | |
|---|---|---|
| Intelligence | ||
| Arena · Overall(LMArena Elo — higher is better) | 1453✓ | 1442 |
| Arena rank (overall) | #25✓ | #33 |
| Arena · Coding | 1539✓ | 1537 |
| Arena · Math & reasoning | 1435✓ | 1410 |
| Arena · Agentic / tool use | 1445✓ | 1418 |
| Score evidence | Measured | Measured |
| Pricing (USD / 1M tokens) | ||
| Input | $5.00 | $2.00✓ |
| Output | $25.00 | $10.00✓ |
| Cached input (read) | $0.5000 | $0.2000✓ |
| Cache write | $6.25 | $2.50✓ |
| Blended(3:1 input:output blend) | $10.00 | $4.00✓ |
| Specs & capabilities | ||
| Provider | Anthropic | Anthropic |
| Context window | 1M (1,000,000) | 1M (1,000,000) |
| Max output | 64,000 | 64,000 |
| Modalities | text, image | text, image |
| Vision | Yes | Yes |
| Tool use | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Batch pricing | Yes | Yes |
| Tokenizer | claude | claude |
| Release date | 2026-05-28 | — |
| Status | ga | ga |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 18 September 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Compare on your own workload
Claude Opus 4.8 and Claude Sonnet 5 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
Used unless you set active users below.
Results update automatically as you type.
| Claude Sonnet 5 | Anthropic | $0.00700 | $700.00 | $8,400.00 | 1,000,000 |
| Claude Opus 4.8 | Anthropic | $0.0175 | $1,750.00 | $21,000.00 | 1,000,000 |
FAQ
Which is cheaper, Claude Opus 4.8 or Claude Sonnet 5?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, Claude Sonnet 5 is cheaper, costing about $700.00/month versus $1,750.00/month.
What is the context window of Claude Opus 4.8 and Claude Sonnet 5?
Claude Opus 4.8 supports 1,000,000 tokens, while Claude Sonnet 5 supports 1,000,000 tokens.
Estimates for planning only. Verify current pricing with each provider.