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All LLM updates

What did OpenAI change this week?

GPT-4, GPT-4o, Responses API, Assistants, tool calling

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1 change from OpenAI this week.

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mediumLatency Update4/1/2026

Gradient Labs gives every bank customer an AI account manager

Gradient Labs uses GPT-4.1 and GPT-5.4 mini and nano to power AI agents that automate banking support workflows with low latency and high reliability.

Action: Re-run latency/cost checks and adjust timeout budgets.

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