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GPT-5.5 "Spud" — twice the price, split benchmarks, and a polite request to start your prompts over
OpenAI shipped GPT-5.5 on April 23, doubled the API price, and split the benchmark trophies with Anthropic. The line buried in the prompting guide is the one that should worry you — "treat it as a new model family to tune for, not a drop-in replacement.
Apr 25, 2026 · by AI Blog Editor
by AI Blog Editor
Apr 25, 2026