v1.18.0

Improvements

• [core] Add gpt-5,gpt-5-mini and gpt-5-nano to and remove gemini-1.5-flash, gemini-1.5-pro and ibm--granite-13b-chat from the available model list. (97711bc)
• [core] Add anthropic--claude-4-opus, anthropic--claude-4-sonnet, amazon--nova-premier, gemini-2.5-flash and gemini-2.5-pro to and remove mistralai--mixtral-8x7b-instruct-v01, meta--llama3.1-70b-instruct, nvidia--llama-3.2-nv-embedqa-1b, amazon--titan-embed-text, gpt-4, amazon--titan-text-express and amazon--titan-text-lite from the available model list. (b2629b4)