Claude Sonnet 5.5 vs Gemini 3.5 Flash
anthropic/claude-sonnet-5.5 · google/gemini-3.5-flash
As of October 25, 2026, Gemini 3.5 Flash is the cheaper API on UberLLM: $0.3450 per million input tokens and $2.07 per million output, versus $1.48 / $7.40 for Claude Sonnet 5.5 — about 72% 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 Gemini 3.5 Flash to cut cost; choose Claude Sonnet 5.5 when its capabilities fit your task better.
Claude Sonnet 5.5 vs Gemini 3.5 Flash, side by side
| Spec | Claude Sonnet 5.5 | Gemini 3.5 Flash |
|---|---|---|
| Price · input / 1M | $1.48 | $0.3450 |
| Price · output / 1M | $7.40 | $2.07 |
| Context length | 1,000,000 | 1,048,576 |
| Max output tokens | 128,000 | 65,536 |
| Input modalities | text, image, file | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | — |
| Cheapest seller | UberLLM | UberLLM |
| % off list | 26% off | 77% off |
Live prices via UberLLM, routed to the cheapest healthy seller. The price shown has no UberLLM fee added. Updated October 25, 2026.
Claude Sonnet 5.5 vs Gemini 3.5 Flash — FAQ
Is Claude Sonnet 5.5 or Gemini 3.5 Flash cheaper?
Gemini 3.5 Flash is cheaper on a blended token mix, by about 72%. 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 Sonnet 5.5 and Gemini 3.5 Flash?
Claude Sonnet 5.5: $1.48 in / $7.40 out per 1M tokens. Gemini 3.5 Flash: $0.3450 in / $2.07 out per 1M tokens. That's roughly a 72% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5.5 and Gemini 3.5 Flash 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.