Product changelog says available on August 6; the separate press release is dated August 13. This records rollout evidence, not a universal API availability date.
Parameters
Not collected
Architecture
Not collected
Languages
Not collected
Context caching
Not collected
The chat usage schema includes cached_tokens, but support, rates, TTL, thresholds and configuration for this exact model are unverified.
WRITER API account/key required. API, Agent Builder and no-code share the published model token rates. WRITER Agent has a distinct X5 rate and separately billed tools.
The provider explicitly supports tool calling for Palmyra X4 and later models. Built-in product actions are separate from native model output.
INPUT / 1M TOKENS$2.00
OUTPUT / 1M TOKENS$8.00
Direct WRITER API / Agent Builder / no-code token rates. Tools, Knowledge Graph and other product usage are billed separately; cached-input pricing is unverified. Cached input price: not collected.
Product model selector; this is not a standalone inference URL.
Access
Model selected inside WRITER Agent. Product/tool/connector charges are separate from model tokens. Admin model access controls apply.
Regions
Not collected
INPUT / 1M TOKENS$2.00
OUTPUT / 1M TOKENS$8.00
WRITER Agent model token rates, not the direct API rate. Connector, Knowledge Graph and other charges are additional. Cached input price: not collected.
Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.
Caching
Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.
01 / INITIAL INPUTProcess & retain
The system processes eligible input and retains reusable state.
02 / LATER REQUESTCheck available state
Reuse depends on matching input, session state and the cache policy.
03 / CACHE HITReuse & generate
Reusing state can reduce repeated work. Any charges follow the billing rules below.
WRITER API
palmyra-x6
Not verified
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
How it works
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Minimum reusable input
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Lifetime & refresh
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
How to enable it
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Usage fields
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Billing rules
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Limits & data boundaries
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Caching reviewed 14 Oct 2026
WRITER Agent
palmyra-x6
Not verified
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
How it works
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Minimum reusable input
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Lifetime & refresh
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
How to enable it
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Usage fields
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Billing rules
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
Limits & data boundaries
Not collected
No model-specific provider cache contract or price verified. A cached_tokens usage field alone does not establish cache eligibility, lifetime or a discounted rate.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Caching reviewed 14 Oct 2026
What the measurements say
No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.
Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.
The record behind the model
Why it is included
Hosted-release distribution inference: the reviewed exact API model is commercially served by WRITER and no public trained weights for this exact release were identified. Related X-4.3 and explicitly dummy-weight repositories do not establish that the current X4 selector serves those same downloadable weights. Exact checkpoint mapping remains under review.
