Z-Image Spicy Pro NSFW Is Live: Confirmed Specs, Price

Z-Image Spicy Pro is now callable through Siray's API. The endpoint is alibaba/z-image-spicy-pro-t2i, and the confirmed spec differs from what vendor documentation suggested before launch — including one default that turns out to be the opposite of what was expected. Here is what actually shipped.

Key Takeaways

• Z-Image Spicy Pro is live at alibaba/z-image-spicy-pro-t2i, priced at $0.020 per output image with no discount structure.
• Output size comes from an eight-value size enum topping out at 2560x1440 — not free-form width and height.
• prompt_expansion_enable defaults to true, so prompts get rewritten unless the flag is explicitly set to false.
• The two boundaries from Z-Image Turbo carry over unchanged: no negative_prompt field, no face-swap capability.

The Confirmed Spec

Three fields are required: model, prompt, and size. The size parameter is an enum with eight values — 1024x768, 768x1024, 1024x1024, 1024x1536, 1536x1024, 2560x1440, 1440x2560, and custom. Free-form width and height fields do exist, but they only take effect when size is set to custom, and Siray's published spec does not declare bounds for them. seed accepts -1 through 9999999999, where -1 means random.

One structural limit shapes any workflow built on this tier: Spicy Pro ships as text-to-image only. There is no i2i or ref2i variant. Character work runs through seed and prompt structure rather than a reference image, so the techniques in Z-Image NSFW Character Consistency become the practical path.

Prompt Expansion Is On by Default

prompt_expansion_enable is a boolean that auto-rewrites and expands a prompt before generation, and it defaults to true. This is the field most likely to catch anyone moving over from turbo, because turbo has no equivalent parameter at all. There is no setting to carry over — the behaviour simply starts happening.

The effect is easy to miss. A short prompt benefits from it: the model fills in lighting, composition, and material detail on its own. A fully art-directed prompt does not. When a prompt already specifies camera angle, lighting setup, and style reference, expansion can reinterpret details that were deliberately locked in — and because the flag is on unless set otherwise, that reinterpretation happens silently on every request.

For art-directed NSFW work, set prompt_expansion_enable to false explicitly, then switch it on only for short prompts or bulk passes. Anyone leaning on seed for repeatability should treat this as a prerequisite: expansion runs before generation, so a locked seed alone does not guarantee a repeatable result. The prompt structures in the Z-Image NSFW Prompt Guide transfer directly to this tier, but they only behave predictably with expansion turned off.

What the Resolution Jump Actually Changes

Turbo caps at 1024x1024. Spicy Pro reaches 2560x1440. In pixels, that is 1.05 MP to 3.69 MP — roughly 3.5 times the output.

Turbo's ceiling is built for single-post social content, where a larger file only means slower generation for no visible gain. A 2560-pixel ceiling opens up larger formats: posters, hero banners, and any placement shown bigger than a phone screen that still needs to hold detail. Pipelines shipping only square social posts will not feel the difference. The two portrait presets, 1024x1536 and 1440x2560, matter as much as the landscape ones, since turbo offers only 768x1024 vertically.

What Carries Over Unchanged

Two boundaries stay exactly where they were. There is no negative_prompt field, matching turbo's existing gap, so exclusion lists are not available on this tier. There is also no face-swap or identity-transfer capability. Neither is new to Pro — they are the same two limits already worked around on turbo, now confirmed to still apply.

What It Costs

$0.020 per output image, measured on Siray's console, with no discount structure attached. Turbo runs $0.004. That puts Spicy Pro at five times the price for roughly 3.5 times the pixels, plus the wider size presets and the expansion flag.

The practical split: turbo stays the default for routine social content and bulk drafting; Spicy Pro earns its rate on delivery pieces and anything displayed larger than a phone screen. For how this tier sits alongside the other uncensored image models, see where Z-Image Spicy Pro fits in Siray's NSFW image lineup.

Create your free Siray account and start generating with Z-Image Spicy Pro alongside 300+ other models through one API key.

A Note on Compliance

Siray's NSFW and uncensored models generate legal, consensual adult content for verified adults only. CSAM and any other illegal content are refused with zero tolerance. Z-Image Spicy Pro is a third-party model available through Siray's API, not a Siray-hosted model, and the same standard applies to everything generated with it.