Aion 3.5 Mini vs Claude Opus 5
aion-labs/aion-3-5-mini · anthropic/claude-opus-5
As of November 2, 2026, Aion 3.5 Mini is the cheaper API on UberLLM: $0.3063 per million input tokens and $0.6125 per million output, versus $0.1550 / $0.7750 for Claude Opus 5, about 14% 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 Aion 3.5 Mini to cut cost; choose Claude Opus 5 when context size wins. Claude Opus 5 carries the larger context window (1,000,000 vs 262,144 tokens), which can matter for long-document work.
Aion 3.5 Mini vs Claude Opus 5, side by side
| Spec | Aion 3.5 Mini | Claude Opus 5 |
|---|---|---|
| Price · input / 1M | $0.3063 | $0.1550 |
| Price · output / 1M | $0.6125 | $0.7750 |
| Context length | 262,144 | 1,000,000 |
| Max output tokens | 32,768 | 128,000 |
| Input modalities | text | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | — | Yes |
| Reasoning | Yes | Yes |
| % off list | 65% off | 96.9% off |
| First token, median (7 days) | — | 4.7 s (660 requests) |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 2, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Aion 3.5 Mini vs Claude Opus 5 — FAQ
Is Aion 3.5 Mini or Claude Opus 5 cheaper?
Aion 3.5 Mini is cheaper on a blended token mix, by about 14%. 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 Aion 3.5 Mini and Claude Opus 5?
Aion 3.5 Mini: $0.3063 in / $0.6125 out per 1M tokens. Claude Opus 5: $0.1550 in / $0.7750 out per 1M tokens. That's roughly a 14% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Aion 3.5 Mini and Claude Opus 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.