Free GPT-5.4 mini API
Updated 5/23/2026
GPT-5.4 mini is OpenAI's fast, low-cost model (Mar 2026) with a 400K context window — strong coding, tool calling and image reasoning, roughly 2x faster than GPT-5 mini.
About the Model
GPT-5.4 mini (March 2026) is OpenAI's fast, low-cost model with a 400K-token context window, optimized for coding, tool calling, and image reasoning. It runs 2×+ faster than GPT-5 mini while approaching the larger GPT-5.4 on several benchmarks.
Available free to start via Vercel AI Gateway ($5/month in credits, no credit card) — a great pick for strong capability at high speed and low cost.
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