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OpenAI: gpt-5.1 shuts down 2027-04-01
Official OpenAI page lists a shutdown date of 2027-04-01 (in 167 days) for gpt-5.1. Recommended replacement: gpt-6-sol. Source: https://developers.openai.com/api/docs/deprecations
Source: https://developers.openai.com/api/docs/deprecations
Event #578
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