UltraGPT
OpenRouter: Fusion
Fusion turns your prompt into a small multi-model deliberation. A panel of expert models (see below) analyzes your prompt in parallel with web search and web fetch enabled, then a...
Intelligence overview
1M tok
Context window
— tok
Max output
What OpenRouter: Fusion can do.
Development
Streaming
Streams tokens as they're generated instead of waiting on the full response.
Pay for what you use.
Every model in UltraGPT runs behind one flat subscription — this is the underlying per-token cost the catalog tracks.
$-1000000 / 1M tok
$-1000000 / 1M tok
Built for serious work.
Research
Holds up to 1M tokens of source material in context without losing the thread.
Ask OpenRouter: Fusion anything.
A preview of the real UltraGPT composer — the model you see here is the model you get.
Continues in the UltraGPT app — one login, every model.
How OpenRouter: Fusion stacks up.
The closest models in the catalog by provider, capability and score — real entries, pulled from the same directory.
Technical details.
Specification
- Context window
- 1M tokens
- Max output
- — tokens
- Input modalities
- Text
- Output modalities
- Text
- Release date
- Jun 13, 2026
- Streaming
- Supported
- Tool calling
- Not supported
- JSON mode
- Not supported
More from OpenRouter, and everything else.
This model is one entry in the full UltraGPT catalog — browse the rest, compare pricing and context windows, or filter by capability.