Anthropic released its Opus 5 AI model on Friday, claiming that it "comes close to the frontier intelligence of Claude Fable 5 at half the price." That's welcome news for enterprises beset by rising token costs. Fable 5 prices tokens at $10 / MTok input and $50 / MTok output, while Opus 5 prices tokens at $5 / MTok and $25 / MTok. OpenAI's GPT-5.6 Sol sells for $5 / MTok input and $30 / MTok output. However, the tokens required to complete a task can vary from model to model, so it's also useful to assess how much each model costs to complete the same task. Per Artificial Analysis, the weighted average cost (USD) per Intelligence Index task is $2.75 for Fable, $2.03 for Opus 5 (max), $1.04 for GPT-5.6 Sol (max), and $0.95 for Kimi K3. Opus...
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