Writer: Palmyra X5 is Writer's model. Its measured tokenizer sits with the Qwen group, which is evidence that it builds on the Qwen tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Writer's authorship of the model itself.
| Signal | Result | Reference |
|---|---|---|
| Tokenizer signature | Clean measurement; no exact match yet | tk_920d45ce |
| API surface | No other entry shares this exact contract | api_b4cad377 |
| Context and output | 1,040,000 context · 8,192 max output | declared |
| Reasoning contract | None declared | declared |
| Serving providers observed | Amazon Bedrock | measured 3 September 2026 |
Click a row to open the full comparison.
An x marks a row excluded as corrupt (caching or provider interference detected during measurement). Overhead subtracted: 237 prompt tokens.
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...
Supported parameters
max_tokensstoptemperaturetop_ktop_p
defaults: {"temperature":null,"top_p":null,"frequency_penalty":null}
Cite this page as the evidence record for Writer: Palmyra X5: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.
