OpenAI is rumored to release GPT-5.6 on June 23rd, benchmarking against Claude Fable 5 According to Beating monitoring, it has been revealed that OpenAI plans to release a new flagship model codenamed GPT-5.6 on June 23rd. The new model will support a context window of 1.5 million tokens and have improvements in the agent programming workflow, with an API price only one-third of Claude Fable 5. The timing of release is closely related to the dynamics of competitor Anthropic. Anthropic launched the Claude Fable 5 model on June 9th, but it was urgently taken down by the US Department of Commerce on June 12th due to security vulnerabilities. OpenAI chose to release the version on June 23rd mainly to coincide with the end of Fable's transition period and the forced shift of a large number of users to a paid plan. Affected by rumors about the release of GPT-5.6, it is predicted that the probability of OpenAI releasing GPT-5.6 between June 22nd and June 28th in the market has surged to 78%. [Original link]