AmazonReasoning modelPalmyra X4 (US)
Palmyra X4 (US) is an Amazon proprietary reasoning model, released 9 Oct 2024. It is not yet ranked: no independent benchmark results so far, only pricing and metadata. At $4.38 per million tokens blended it is among the most expensive ranked models.
- Blended price
- $4.38/M
- $2.50 in · $10.00 out
- Output speed
- –
- First answer
- –
- Context
- 123k
- Released
- 9 Oct 2024
No independent quality benchmark results yet — only pricing and metadata.
What a task costs
Estimates from list price, output speed and time to first answer for the best configuration. “With caching” assumes three-quarters of the input is served from the prompt cache. Reasoning tokens are not modelled.
| Workload | Tokens in / out | Cost | With caching | Time |
|---|---|---|---|---|
| Chat reply | 400 / 300 | $0.0040 | – | – |
| Summarise a 30-page report | 12,000 / 600 | $0.036 | – | – |
| Code edit | 6,000 / 1,500 | $0.030 | – | – |
| Agentic coding session | 60,000 / 4,000 | $0.190 | – | – |
| Structured extraction | 2,000 / 200 | $0.0070 | – | – |
See also
Data as of 13 Sept 2026. Compare with another model.
Cite as: BenchLeader, “Palmyra X4 (US): benchmarks, pricing, speed and rank”, https://www.benchleader.com/models/us-writer-palmyra-x4, data as of 13 Sept 2026.