UltraGPT
Writer: Palmyra X5
Palmyra X5 is Writer's most advanced model, purpose-built for building and scaling AI agents across the enterprise. It delivers industry-leading speed and efficiency on context windows up to 1 million...
Intelligence overview
1.04M tok
Context window
8.2K tok
Max output
What Writer: Palmyra X5 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.
$0.6 / 1M tok
$6 / 1M tok
Built for serious work.
Research
Holds up to 1.04M tokens of source material in context without losing the thread.
Ask Writer: Palmyra X5 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 Writer: Palmyra X5 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
- 1.04M tokens
- Max output
- 8.2K tokens
- Input modalities
- Text
- Output modalities
- Text
- Release date
- Jan 21, 2026
- Streaming
- Supported
- Tool calling
- Not supported
- JSON mode
- Not supported
More from Writer, 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.