How Much Does It (Really) Cost to Use Claude Fable, GPT-5.5, and Gemini 3.5 Flash?

Key Points:

• AI usage costs are rising as developers spend more on training and running models, while customers face higher prices for access to advanced AI systems amid increasing competition and energy constraints.
• Anthropic’s new Fable 5 model, releasing alongside its anticipated IPO, costs twice as much as its predecessor and will shift to a pay-as-you-go pricing model from June 23, charging $10 per million input tokens and $50 per million output tokens.
• OpenAI’s GPT-5.5 Pro, available via subscription and API, is priced lower than Fable 5 at $5 per million input tokens and $30 per million output tokens, offering a batch tokenization option that improves efficiency but slows response times.
• Google’s Gemini 3.5 Flash, launched last month, is the most affordable option with free usage limits and API access at $1.50 per million input tokens and $9 per million output tokens, emphasizing speed and autonomous capabilities.
• Users should carefully consider their AI needs and pricing plans, as complex tasks like coding require more tokens and higher costs, while simpler chatbot uses may be adequately served by free or lower-cost models.