Build advanced reasoning agents with GPT-5.4 Nano, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.20/1M input and $1.25/1M output tokens, native tool calling support. Access GPT-5.4 Nano via the OpenCode Zen API with up to 128K output tokens.
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GPT-5.4 Nano by OpenCode Zen costs $0.20 per 1M input tokens and $1.25 per 1M output tokens. Cached reads cost $0.02 per 1M tokens.