OpenAI launches GPT-6.1 Terra, a mid-tier model priced at $1 and $5 per million tokens

OpenAI said in a post on its website that GPT-6.1 Terra, a mid-tier model, is available starting today to Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and to developers through the OpenAI API as gpt-6.1-terra; the post does not give a date, and The Register published its report on Oct. 26.21

OpenAI said in its announcement that Terra's standard API prices are 50% lower than those of GPT-5.6 Terra and GPT-6.1 Sol, and it named reading incoming invoices and entering their details into accounting software as an example of high-volume work developers can automate.2 The Register reported that Max Woolf, a data scientist, wrote in a blog post that inference providers will cut token prices to compete with each other, so OpenAI and Anthropic will have to lower theirs too; OpenAI did not give that as its reason.1

Standard API pricing is $1 per million input tokens, $0.05 per million cached input tokens and $5 per million output tokens, according to OpenAI's API documentation.3

The Register listed the other tiers as GPT-6 Luna at $0.10 and $0.50, GPT-6.1 Sol at $2 and $10, and GPT-6 Astra at $10 and $50 per million input and output tokens.1

Ted Sanders, a member of technical staff at OpenAI, said in a Hacker News comment that Terra is "probably better than Astra and Sol at technical communication, similar on vision and computer use (but much faster!), and a bit worse on most other things."1

On OpenAI's MMMU-Pro visual reasoning benchmark at max effort, InfoWorld reported Terra scored 85.5%, against 86.3% for Sol and 86.7% for Astra; the model accepts text and image input and produces text output.43