gpt-5.3-chat-latest shut down on 2026-08-10 per OpenAI's deprecation page (checked 2026-10-17). The official replacement is gpt-5.6-sol. On the labeled example of 10 million input tokens and 2 million output tokens, gpt-5.6-sol costs $80 a month, higher than $45.5 for gpt-5.3-chat-latest.
gpt-5.3-chat-latest shut down on 2026-08-10 per OpenAI's deprecation page (checked 2026-10-17). The official replacement is gpt-5.6-sol. On the labeled example of 10 million input tokens and 2 million output tokens, gpt-5.6-sol costs $80 a month, higher than $45.5 for gpt-5.3-chat-latest.