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free models.

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Callstack

Explore free AI models, compare capabilities and benchmarks, and find API providers offering them.

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Multimodal capabilities1 model

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Models by Callstack.

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C
Apex
Callstack

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.

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VAVercel AI Gateway

1 free model