Callstack
Available in Shortly AI
Apex
Released October 8, 2026
ReasoningVision (Image)Tool Use
Apex is Callstack’s agentic coding model for mobile and web development, optimized for React Native, React, and Next.js. With a 256K context window, it supports feature development, debugging, code reviews, testing, and large refactors.
- Context window
- 262.1K tokens
- Maximum output
- 131.1K tokens
- Input pricing
- $0.50/M
- Output pricing
- $3.00/M
FAQ
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