Palmyra X6
Writer · Released Aug 2026
Palmyra X6 is Writer's flagship agentic model for marketing and revenue workflows — post-trained on Z.ai's open-weight GLM-5.2 at $2/$8 per 1M tokens, a fraction of the frontier rate. Every headline number is Writer-run, and the GLM-5.2 provenance is a real procurement question. Adopt it inside Writer for cost-sensitive GTM agent work; look elsewhere for independently benchmarked general capability.
Is it right for you?
Good for
- Cost-sensitive enterprise GTM agents — $2/$8 per 1M tokens undercuts Claude Opus 4.8, GPT-5.5, and Gemini 3.1 on Writer's own launch comparison
- Marketing and revenue workflows — top internal scores in brand voice (0.92), grounding/retrieval (0.91), and content generation (0.88)
- Long-horizon unattended execution — sustains a single goal up to 8 hours; 82 tokens/sec, 26-second median finished task
- 1M-token context for connector-driven work across CRM, Slack, documents, and Knowledge Graphs
- Bias-averse regulated enterprises — pre-registered model-risk eval (19,674 judged responses); best ModelSlant both-sides rate (80%) and FORTRESS +8.6 over the base
Not good for
- Independently benchmarked general capability — X6 publishes no public benchmarks; all scores are Writer's internal eval (n=22, baseline frozen 2026-06-07)
- Deployments outside Writer's platform — no Bedrock model ID at launch (X5/X4 have one); tuned to co-evolve with the Writer Agent harness
- Buyers with a hard block on Chinese open-weight foundations — post-trained on Z.ai's GLM-5.2 (MIT license), a supply-chain question for some US enterprises
How it performs by task
Grounding and retrieval
0.91 internal capability score — Knowledge Graph/document grounding, retrieval and citation
Brand voice
0.92 — strongest single capability; applies brand voice and custom instructions to output
Content generation
0.88 — drafts and edits long- and short-form content to a brief
Sub-agent delegation
0.86 — delegating work to spawned sub-agents and merging results (Writer-run internal eval)
MCP tool use
0.88 — connector-driven actions across CRM, Slack, and documents
Long-horizon unattended execution
Up to 8 hours on a single goal; 82 tokens/sec, 26s median finished task
Pricing
Input
$2 / 1M
Output
$8 / 1M
Context
1M context, 8K max output
Benchmarks
No verdict changes yet
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Sources
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