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Model infoModelsSnapshot: 15 Oct 2026

Tencent / Hunyuan Image

Hy-Image 3.5 Preview

Image generation and conversational editing with up to 20 reference images and direct 4K output.

previewClosed weightsImage generationImage editing
Official documentation (opens in a new tab)Reviewed 12 Oct 2026
9 of 20 specification fields collected
Output resolutionWidth and height: 256–8192 px; maximum area: 16,777,216 pixels (4096 × 4096).See specification notes below
Output formatsNot collectedAwaiting source review
Input billingSee ratesTencent TokenHub
Output billingSee ratesPublished units and conditions below

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected
Maximum output
Not collected
Reasoning
SupportedSource for Reasoning (opens in a new tab)

The returned assembled_history includes the model’s reasoning and internal image-tool calls.

Tool calling
Not collected

The guide documents internal image-tool history and a built-in search switch, not caller-defined function tools.

Structured output
Not collected
Streaming
Not supportedSource for Streaming (opens in a new tab)

The documented TokenHub route buffers upstream SSE and returns the final image frame synchronously. Upstream streaming is not caller-visible streaming.

Batch processing
Not collected
Fine-tuning
Not collected
Knowledge cutoff
Not collected
Release date
Not collected
Parameters
Not collected
Architecture
Not collected
Languages
Not collected
Context caching
SupportedSource for Context caching (opens in a new tab)

The session parameter keeps requests on the same inference instance to improve KV-cache hits. No cache discount, minimum or TTL is stated.

Input image limits
Up to 20 PNG/JPEG/JPG reference images; at most 20 MB each; older turns may be truncated beyond that count.Source for Input image limits (opens in a new tab)
Output resolutions
Width and height: 256–8192 px; maximum area: 16,777,216 pixels (4096 × 4096).Source for Output resolutions (opens in a new tab)
Built-in tools
Optional external search augmentation, Internal image generation toolSource for Built-in tools (opens in a new tab)

These built-in tools do not establish arbitrary developer-defined function calling.

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

API model ID
hy-image-v3.5-preview
Access
Tencent Cloud account, activated model service and TokenHub API key required. Availability is documented, not confirmed by a paid inference call.
Regions
Guangzhou gateway. Availability on the separate Singapore site is not inferred; site API keys are not interchangeable.
API endpoint URL
POST https://tokenhub.tencentmaas.com/v1/wand/hunyuan-image/v35-generationSource for API endpoint URL (opens in a new tab)

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 12 Oct 2026
CategoryUsageRateUnit
Image generationOutput image1CN¥0.15image
Image generationOutput image2CN¥0.20image

Rate conditions

  1. 1K / 2K output. Published reference cost: 15,000 billing tokens at 1K/2K or 20,000 at 4K, billed at CNY 10 per million billing tokens. These are media billing units, not text context tokens.
  2. 4K output. Published reference cost: 15,000 billing tokens at 1K/2K or 20,000 at 4K, billed at CNY 10 per million billing tokens. These are media billing units, not text context tokens.
Pricing source (opens in a new tab)

Data & enterprise terms

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.

Tencent TokenHub

hy-image-v3.5-preview
Documented
Support evidence (opens in a new tab)
How it works
Instance-local KV cacheSource for How it works (opens in a new tab)
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Keep the same session value for all turns in an editing conversation.Source for How to enable it (opens in a new tab)
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Routing improves the chance of a hit; retention and discounted billing are not specified.Source for Limits & data boundaries (opens in a new tab)

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Caching reviewed 12 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

Inferred for this named native commercial model service from its official access documentation and comparison with Tencent’s published model-weight inventory. No weight release for this exact service was found in the reviewed inventory. This is not a claim that every Tencent model is closed or that the provider has disclosed the underlying checkpoint. Public Hy3, Hy4, Hy-MT2 and HunyuanImage 3.0 releases are excluded.

Classification evidence (opens in a new tab)

Sources reviewed