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OpenAI Launches GPT-5.5, Beats Anthropic, Prices Double

4/24/2026

23 5 Full Breakdown

Summary

Story summary

OpenAI released GPT-5.5 on April 23 2026.
The model costs $5 per 1 M input tokens and $30 per 1 M output, double GPT-5.4 rates.
GPT-5.5 scored 82.7 % on Terminal-Bench 2.0, surpassing Anthropic’s Mythos Preview (82.0 %).
In internal coding tests, GPT-5.5 achieved 73.1 % on Expert-SWE using fewer tokens than GPT-5.4.
The model is now available to ChatGPT Plus, Pro, Business and Enterprise subscribers, with API access forthcoming.

History

Historical Context

OpenAI released GPT-3 in June 2020, a groundbreaking AI language model with 175 billion parameters, significantly surpassing its predecessor, GPT-2, which had 1.5 billion. This innovation attracted major investments, including a $1 billion stake from Microsoft, intensifying competition among tech giants like Google and Facebook to develop advanced AI technologies, reflecting the rapid evolution of artificial intelligence in various industries.

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Story summary

OpenAI released GPT-5.5 on April 23 2026.
The model costs $5 per 1 M input tokens and $30 per 1 M output, double GPT-5.4 rates.
GPT-5.5 scored 82.7 % on Terminal-Bench 2.0, surpassing Anthropic’s Mythos Preview (82.0 %).
In internal coding tests, GPT-5.5 achieved 73.1 % on Expert-SWE using fewer tokens than GPT-5.4.
The model is now available to ChatGPT Plus, Pro, Business and Enterprise subscribers, with API access forthcoming.

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