Kaiju Small
Kaiju Small is an app-only language model from Character.ai, released November 7, 2025. Its makers disclosed about 13B parameters.
Kaiju is Character.ai’s in-house family of LLMs built specifically to be fast, engaging, and with an eye towards safety. Available in three sizes, Kaiju combines a dense transformer architecture with aggressive efficiency optimizations, including int8 quantization, multi-query attention, sliding-window attention, and …
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Lab
Character.ai
Released
November 7, 2025
Weights
app-only
Parameters
13B disclosed
Context
–
Price / M tokens
–
Epoch ECI
not yet rated
Benchmark results
Epoch AI has not published results for Kaiju Small yet. New models are usually evaluated within days to weeks.