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Zeitgeist — a spike by Chris Gathercole
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GPT-6.1 Terra

Blog · Watch/Read · (gathered 2026-10-29)

  • GPT-6.1 Terra is introduced as OpenAI’s new “midrange” model, specifically highlighted for its “detailed visual reasoning and precise computer use” alongside “clearer, more natural writing,” making it suitable for workday communication and computer-based tasks.
  • Positioned similarly to Anthropic’s Sonnet, OpenAI’s Ted Sanders advises that Terra excels in “technical communication” and offers similar (but faster) performance on vision/computer use compared to Astra and Sol, making it a “nice midrange option” for API developers between Sol and Luna.
  • Priced at $1/million input and $5/million output tokens, it’s almost half the cost of GPT-5.6 Terra and GPT-6.1 Sol, making it a cost-effective choice for automated, repetitive computer-based tasks or for subscribers looking to extend usage limits.