What happened
OpenAI launched GPT-6.1 Terra in its API and ChatGPT Work and Codex on October 26, 2026, at $1 per million input tokens and $5 per million output tokens.
- Input token price
- $1 / 1M tokens Standard API price per million input tokens; cached input is $0.05/1M and output is $5/1M.OpenAIgHacks
- Error rate at low effort
- 16.7% Down from 53.6% for GPT-5.6 Terra on OpenAI's error-inducing prompt benchmark.OpenAIgHacks
- Terminal-Bench 4.0 solve rate
- 50.3% GPT-6.1 Terra solves 50.3% of command-line coding tasks versus 21.5% for GPT-5.6 Terra.OpenAIgHacks
- Speed vs GPT-6 Astra
- 3x+ faster OpenAI says GPT-6.1 Terra completes tasks over three times faster than GPT-6 Astra and GPT-6.1 Sol.OpenAI
Why it matters
Developers and small teams on paid API access pay about half of the last Terra model per call, making automation of routine, repetitive work cheaper.
Remember this
GPT-6.1 Terra is roughly half the API price of GPT-5.6 Terra with far fewer coding errors.
Who can use it
The model is available to Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and to developers through the API. It is not included in the free ChatGPT tier.
More context & who is affected
OpenAI's newest mid-range model, GPT-6.1 Terra, is now live in its developer API and inside ChatGPT Work and Codex. Every million input tokens carries a one-dollar price and each million output tokens five dollars, about half what GPT-5.6 Terra charged, trimming the cost of repeating scripted jobs.
In OpenAI's own testing, the model finished 50.3% of command-line coding tasks on Terminal-Bench 4.0, while GPT-5.6 Terra managed 21.5%. On a benchmark built around error-inducing prompts, the low-effort error rate slid from 53.6% to 16.7%.
Indian developers who pay for API access mainly gain cheaper automation of everyday chores such as reading invoices and entering those figures into accounting software. The free ChatGPT tier excludes the model, and OpenAI has not released India-specific pricing.
Developers
API costs for GPT-6.1 Terra are about half of GPT-5.6 Terra, so developers running high-volume automation pay less per call.
Developers
Lower error rates and faster completion make AI assistants more reliable for repetitive command-line and data-entry tasks.
General Public
Free ChatGPT users do not get the model; it is for Plus, Pro, Enterprise and Edu subscribers and API developers.
Reporting fromOpenAI ↗gHacks ↗
Sources & verification2 sources · 4 claims
These are the records behind this briefing. Linked reporting is not the same as independent confirmation.
- OpenAIOfficialPublished Oct 26, 2026 · Accessed Oct 29, 2026
- gHacksReporting
OpenAI Launches GPT-6.1 Terra With API Pricing 50% Lower Than GPT-5.6 Terra ↗
Published Oct 27, 2026 · Accessed Oct 29, 2026
Claims and linked sources
OpenAI launched GPT-6.1 Terra on October 26, 2026 in its API and in ChatGPT Work and Codex.
API pricing is $1 per million input tokens and $5 per million output tokens, 50% below GPT-5.6 Terra and GPT-6.1 Sol.
The model is available to Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and to developers via the API; it is not in the free Chat tier.
On Terminal-Bench 4.0 the model solves 50.3% of command-line coding tasks versus 21.5% for GPT-5.6 Terra.
