Cheap, Fast AI Models in 2026: What GPT-6.1 Terra and Claude Haiku 5.5 Really Cost in Practice
October brought two releases aimed at the same problem: AI that is good enough for daily work but cheap enough to run thousands of times. OpenAI released GPT-6.1 Terra on October 26, and Anthropic released Claude Haiku 5.5 on October 7. Both are positioned as fast, efficient models rather than flagship ones. Headlines about “50%…
