Claude Opus 5.5 vs Claude Sonnet 5
anthropic/claude-opus-5.5 · anthropic/claude-sonnet-5
As of October 25, 2026, Claude Sonnet 5 is the cheaper API on UberLLM: $0.1600 per million input tokens and $0.8000 per million output, versus $2.32 / $11.60 for Claude Opus 5.5 — about 93% less on a blended 3:1 token mix. Both are reached through one OpenAI-compatible key and routed to the cheapest healthy seller, with no UberLLM fee added, so the price you see is the price you pay. Choose Claude Sonnet 5 to cut cost; choose Claude Opus 5.5 when its capabilities fit your task better.
Claude Opus 5.5 vs Claude Sonnet 5, side by side
| Spec | Claude Opus 5.5 | Claude Sonnet 5 |
|---|---|---|
| Price · input / 1M | $2.32 | $0.1600 |
| Price · output / 1M | $11.60 | $0.8000 |
| Context length | 1,000,000 | 1,000,000 |
| Max output tokens | 128,000 | 64,000 |
| Input modalities | text, image, file | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | Yes |
| Cheapest seller | UberLLM | UberLLM |
| % off list | 42% off | 92% off |
Live prices via UberLLM, routed to the cheapest healthy seller. The price shown has no UberLLM fee added. Updated October 25, 2026.
Claude Opus 5.5 vs Claude Sonnet 5 — FAQ
Is Claude Opus 5.5 or Claude Sonnet 5 cheaper?
Claude Sonnet 5 is cheaper on a blended token mix, by about 93%. UberLLM routes every request to the cheapest healthy seller and bills the price shown, with no fee added.
What's the price difference between Claude Opus 5.5 and Claude Sonnet 5?
Claude Opus 5.5: $2.32 in / $11.60 out per 1M tokens. Claude Sonnet 5: $0.1600 in / $0.8000 out per 1M tokens. That's roughly a 93% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Opus 5.5 and Claude Sonnet 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.