Build advanced reasoning agents with Phi-4-Reasoning, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support, open weights architecture. Access Phi-4-Reasoning via the GitHub Models API with up to 4K output tokens.
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Phi-4-Reasoning by GitHub Models costs Free per 1M input tokens and Free per 1M output tokens.