Add model C1.2 from Character.ai?

Description

Contributor guide

Tech stack

python

Domain

backendapi

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-2 days

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

needs investigation

Prerequisites

PythonKnowledge of FastChat model integration

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40

Research direction

Investigate the C1.2 model from the Character.ai blog. Determine if the model is publicly available and its architecture. Review how existing models like Vicuna are integrated in FastChat (e.g., in fastchat/model/ and fastchat/serve/). Then propose a pull request to add the model, including conversion scripts and registration.