Claude Opus 5.5 vs Claude Sonnet 4.5
anthropic/claude-opus-5.5 · anthropic/claude-sonnet-4.5
As of November 9, 2026, Claude Opus 5.5 is the cheaper API on UberLLM: $0.2298 per million input tokens and $1.15 per million output, versus $0.7035 / $3.52 for Claude Sonnet 4.5, about 67% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose Claude Opus 5.5 to cut cost; choose Claude Sonnet 4.5 when its capabilities fit your task better.
Claude Opus 5.5 vs Claude Sonnet 4.5, side by side
| Spec | Claude Opus 5.5 | Claude Sonnet 4.5 |
|---|---|---|
| Price · input / 1M | $0.2298 | $0.7035 |
| Price · output / 1M | $1.15 | $3.52 |
| Context length | 1,000,000 | 198,000 |
| Max output tokens | 128,000 | 64,000 |
| Input modalities | text, image, file | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 94.3% off | 76.6% off |
| First token, median (7 days) | 4.7 s (1,728 requests) | — |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 9, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Opus 5.5 vs Claude Sonnet 4.5 — FAQ
Is Claude Opus 5.5 or Claude Sonnet 4.5 cheaper?
Claude Opus 5.5 is cheaper on a blended token mix, by about 67%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between Claude Opus 5.5 and Claude Sonnet 4.5?
Claude Opus 5.5: $0.2298 in / $1.15 out per 1M tokens. Claude Sonnet 4.5: $0.7035 in / $3.52 out per 1M tokens. That's roughly a 67% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Opus 5.5 and Claude Sonnet 4.5 with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.