GPT-6.1 Terra halves vision-reasoning costs; Decisions API hits GA

OpenAI's GPT-6.1 Terra ships at $1 per 1M input tokens, half the price of GPT-5.6 Terra, with a reported 15-point gain on agent benchmarks and a model-ID-only migration. The Decisions API on GPT-6 Luna reached GA with up to 400 questions per request, $0.10 per 1M input tokens and 10x lower latency.

• GPT-6.1 Terra: $1 per 1M input tokens vs $2 for GPT-5.6 Terra
• 15-point benchmark gain on agent tasks with no prompt changes
• Decisions API: 400 questions per request at $0.10 per 1M tokens ($0.01 cached)
• 10x lower classification latency, US/EU residency at GA