OpenAI launches GPT-6.1 Terra: ~9x cheaper per task than Claude Opus 5.5
testingcatalog · x · 2026-10-27
OpenAI officially announced GPT-6.1 Terra, a fast, efficient model targeting visual reasoning, precise computer use, and clear natural writing.
Key official claims and specs:
- At max effort, Terra is 3x+ as token-efficient as Claude Opus 5.5 at 1/4 the price per token, working out to roughly 9x lower cost per task
- Completes tasks over 3x faster than GPT-6 Astra and GPT-6.1 Sol
- Priced at $1/$5 per million input/output tokens, with a 1,050,000-token context window, 128k max output, and a June 1, 2026 knowledge cutoff
- reasoning.effort supports none/low/medium (default)/high/xhigh/max; tool calling requires the Responses API
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