Consumer AI · GCP
Character.AI
Character.AI runs a proprietary end‑to‑end stack on Google Cloud, training and serving its own Kaiju/C‑series LLMs on GPU and TPU infrastructure (including H100 clusters) with heavy inference optimization, backed by managed databases (AlloyDB, Spanner), Redis, and BigQuery on GCP.[1][2][3][4][7][10][11][15] The production platform uses dense transformer models (Kaiju Small/Medium/Large) trained and hosted on GCP, with int8-optimized inference and custom serving infrastructure for low‑latency conversational workloads.[3][7][11]
Foundation proximity: Native (own / self-hosted weights)
Foundational models & how they consume them
PrimaryKaiju Large (110B) / current C‑series production models· Character.AI (self‑hosted on GCP GPU/TPU, including H100 clusters) · Native (own / self-hosted weights)
SecondaryKaiju Medium (34B)· Character.AI (self‑hosted on GCP GPU/TPU) · Native (own / self-hosted weights)
TertiaryKaiju Small (13B)· Character.AI (self‑hosted on GCP GPU/TPU) · Native (own / self-hosted weights)
Cloud & datastore
GCPAlloyDB for PostgreSQL[2][4]Cloud Spanner[4]Google Cloud Memorystore for Redis Cluster[15]Object storage (Google Cloud Storage, implied for model checkpoints and data)[3][7]Analytics warehouse (BigQuery)[10]Compliance
Unknown (no explicit public certifications like SOC 2, ISO 27001, HIPAA found in retrieved sources; standard GCP security/compliance underlies infra)Similar companies
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FAQ
Does Character.AI use a foundational AI model?
Character.AI uses Kaiju Large (110B) / current C‑series production models, Kaiju Medium (34B), Kaiju Small (13B) (Native (own / self-hosted weights)).
What cloud does Character.AI run on?
Character.AI runs on GCP.
What database does Character.AI use?
Character.AI uses AlloyDB for PostgreSQL[2][4], Cloud Spanner[4], Google Cloud Memorystore for Redis Cluster[15], Object storage (Google Cloud Storage, implied for model checkpoints and data)[3][7], Analytics warehouse (BigQuery)[10].
How close does Character.AI run to the foundational model?
Character.AI is Native (own / self-hosted weights) — close to the metal, so cheaper tokens and more control over outputs.
Sources
character.ai ↗Also on the map
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Architecture inferred from public sources · confidence medium · verify before betting on a detail.