Claude Opus 5.5 vs Claude Sonnet 5.5
Claude Opus 5.5 (Anthropic) versus Claude Sonnet 5.5 (Anthropic): API pricing, context window, capabilities and uptime, from the same data as each model page, at the WandAPI default channel price. Input costs 2.4 Credits / M for Claude Opus 5.5 and 3.2 Credits / M for Claude Sonnet 5.5, so Claude Opus 5.5 is 25% cheaper. Context windows are 1M and 1M.
Claude Opus 5.5claude-opus-5-5Claude Sonnet 5.5claude-sonnet-5-5Specs side by side
| Item | Claude Opus 5.5claude-opus-5-5 | Claude Sonnet 5.5claude-sonnet-5-5 |
|---|---|---|
| Input (prompt) · Credits / M | 2.4≈ $0.363 | 3.2≈ $0.485 |
| Output (completion) · Credits / M | 12≈ $1.82 | 16≈ $2.42 |
| Cache read · Credits / M | 0.12 | 0.16 |
| Context window | 1M | 1M |
| Max output | — | 128K |
| 7-day uptime | 100.0% | 100.0% |
| Latest probe latency | 3.23 s | 3.34 s |
| Measured throughput | — | — |
| Protocols | Anthropic Messages | Anthropic Messages |
| Sample monthly cost (10M in + 2M out) | 48≈ $7.27 | 64≈ $9.69 |
Prices are the WandAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from WandAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which is cheaper, Claude Opus 5.5 or Claude Sonnet 5.5?
At the WandAPI default channel price, Claude Opus 5.5 input costs 2.4 Credits / M and Claude Sonnet 5.5 input costs 3.2 Credits / M, so Claude Opus 5.5 is 25% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, Claude Opus 5.5 or Claude Sonnet 5.5?
Claude Opus 5.5 offers 1M tokens, Claude Sonnet 5.5 offers 1M tokens.
Can I switch between Claude Opus 5.5 and Claude Sonnet 5.5 at any time?
Yes. WandAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.
How do the capabilities of Claude Opus 5.5 and Claude Sonnet 5.5 differ?
Only Claude Sonnet 5.5: Response Schema, File Input, Web Search. Every other capability is either supported by both or by neither; see the capability table above.
More comparisons
One API key for both Claude Opus 5.5 and Claude Sonnet 5.5
Free credits on sign-up, pay as you go, no monthly fee.