GPT-5.5 Pro vs Particle AI: Particle-1
openai/gpt-5.5-pro · particle-ai/particle-1
As of November 1, 2026, Particle AI: Particle-1 is the cheaper API on UberLLM: $0.0495 per million input tokens and $0.4950 per million output, versus $9.00 / $54.00 for GPT-5.5 Pro, about 99% 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 Particle AI: Particle-1 to cut cost; choose GPT-5.5 Pro when its capabilities fit your task better.
GPT-5.5 Pro vs Particle AI: Particle-1, side by side
| Spec | GPT-5.5 Pro | Particle AI: Particle-1 |
|---|---|---|
| Price · input / 1M | $9.00 | $0.0495 |
| Price · output / 1M | $54.00 | $0.4950 |
| Context length | 1,000,000 | 1,048,576 |
| Max output tokens | 128,000 | 131,072 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 70% off | 1% off |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 1, 2026.
GPT-5.5 Pro vs Particle AI: Particle-1 — FAQ
Is GPT-5.5 Pro or Particle AI: Particle-1 cheaper?
Particle AI: Particle-1 is cheaper on a blended token mix, by about 99%. 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 GPT-5.5 Pro and Particle AI: Particle-1?
GPT-5.5 Pro: $9.00 in / $54.00 out per 1M tokens. Particle AI: Particle-1: $0.0495 in / $0.4950 out per 1M tokens. That's roughly a 99% blended difference. Prices are live; UberLLM adds no fee.
Can I use both GPT-5.5 Pro and Particle AI: Particle-1 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.