NovelAI

Writers who want an AI co-author for long fiction, and artists who want anime-style images from the same account, will find NovelAI a natural fit.

NovelAI is an AI story generator and image generator that uses its Kayra storyteller model to continue your text, with text-to-speech and image generation in the paid plans.

Roleplay and novel drafting are the main uses.

There is a free trial with 100 text generations and 100 TTS generations, and the memory window there is 6144 tokens.

Paid plans start at $10 a month.

Tablet costs $15 a month and gives unlimited text generations, 3072 tokens of memory, 1000 Anlas refilled monthly, advanced TTS and image access.

Scroll costs $25 a month and raises memory to 6144 tokens.

Opus costs $25 more than that tier's price class and tops out at 8192 tokens of memory, 10,000 Anlas a month, access to experimental features, and unlimited normal and small image generations.

The catch is that memory size and image credits depend on the tier, so heavy users will likely end up on Opus.