Claude Opus 5.5 vs Gemini 3.5 Flash
anthropic/claude-opus-5.5 · google/gemini-3.5-flash
As of October 25, 2026, Gemini 3.5 Flash is the cheaper API on UberLLM: $0.3860 per million input tokens and $2.32 per million output, versus $2.29 / $11.43 for Claude Opus 5.5 — about 80% less on a blended 3:1 token mix. Both are reached through one OpenAI-compatible key and routed to the cheapest healthy seller, with UberLLM's 10% fee already included, so the price you see is the price you pay. Choose Gemini 3.5 Flash to cut cost; choose Claude Opus 5.5 when its capabilities fit your task better.
Claude Opus 5.5 vs Gemini 3.5 Flash, side by side
| Spec | Claude Opus 5.5 | Gemini 3.5 Flash |
|---|---|---|
| Price · input / 1M | $2.29 | $0.3860 |
| Price · output / 1M | $11.43 | $2.32 |
| 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 | 43% off | 74% off |
Live prices via UberLLM, routed to the cheapest healthy seller. The price shown includes UberLLM’s 10% fee. Updated October 25, 2026.
Claude Opus 5.5 vs Gemini 3.5 Flash — FAQ
Is Claude Opus 5.5 or Gemini 3.5 Flash cheaper?
Gemini 3.5 Flash is cheaper on a blended token mix, by about 80%. UberLLM routes every request to the cheapest healthy seller and bills the price shown, with its 10% fee included.
What's the price difference between Claude Opus 5.5 and Gemini 3.5 Flash?
Claude Opus 5.5: $2.29 in / $11.43 out per 1M tokens. Gemini 3.5 Flash: $0.3860 in / $2.32 out per 1M tokens. That's roughly a 80% blended difference. Prices are live and include UberLLM's 10% fee.
Can I use both Claude Opus 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.