Return of the King: GPT-5.6 Pulls Ahead of Fable 5 and Grok 4.5 in My Latest Testing

Return of the King: GPT-5.6 Pulls Ahead of Fable 5 and Grok 4.5 in My Latest Testing follows new model availability after restrictions eased. It says Fable 5 returned from its ban and that Anthropic extended the period for using Fable 5 with a premium Claude subscription instead of dedicated AI credits through July 19. In contrast, Grok 4.5 and GPT-5.6 are described as newly arrived for testing, with Grok offering limited-time free access to Grok 4.5 in Cursor and Grok Build, and free access via its chatbot interface. GPT-5.6 is available in limited form through GPT-5.6 Terra on-the-Go for $8 per month, while higher variants are tied to Plus at $20 per month or Pro starting at $100 per month. In the tester’s comparison, GPT-5.6 is said to deliver the strongest overall chatbot and coding experience, while Fable 5’s usage limits and censorship were criticized.