Build advanced reasoning agents with OpenAI: GPT-5.4, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $2.50/1M input and $15.00/1M output tokens, native tool calling support. Access OpenAI: GPT-5.4 via the Kilo Gateway API with up to 128K output tokens.
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OpenAI: GPT-5.4 by Kilo Gateway costs $2.50 per 1M input tokens and $15.00 per 1M output tokens.