The cost of LLMs is steadily falling, and their quality is rising. This chart helps you navigate the trade-offs.
We use the ELO score (without style control) from the LM Arena leaderboard as a proxy for quality. It's like a chess Elo rating, but for LLMs, based on thousands of human votes.
The price is calculated from both input and output token rates (per million) based on the prompt/output split you choose above (default 3:1). Data comes from the LLM Pricing Calculator. Historically this chart used input-only pricing as a proxy for cost—equivalent to a 1:0 ratio—which you can still reproduce via the preset buttons.