OpenAI created InstructGPT from GPT3 by fine-tuning GPT3 with example data from human testers rating the output of AIs responding to feedback. This was another big step forward in AI alignment.

Compare that to the regular GPT-4o pricing which is $5 per million input tokens and $15 per million output, or even the new GPT-4o mini at $0.15 per million input and $0.60 per million output, and ...

For prompts up to 200,000 tokens, Gemini 2.5 Pro costs $1.25 per million input tokens (roughly 750,000 words, longer than the entire “Lord of The Rings” series) and $10 per million output tokens.

Billionaire Elon Musk has just been countersued by OpenAI, but that isn’t stopping his AI company, xAI, from making its flagship Grok 3 model available via an API.