GPT-5.6 Terra Pricing
OpenAI · GPT-5.6 · Live
GPT-5.6 Terra costs $2.5 per million input tokens and $15 per million output tokens on the OpenAI API. Cached input reads are billed at $0.25 per million tokens. It supports a 1,048,576-token context window and up to 128,000 output tokens per request. The model supports extended reasoning, image input, tool use, long context. Released July 9, 2026. Pricing verified July 29, 2026.
GPT-5.6 Terra API pricing
- Input (per 1M tokens)
- $2.5
- Output (per 1M tokens)
- $15
- Cached input (per 1M tokens)
- $0.25
- Batch discount
- 50%
- Context window
- 1,048,576 tokens
- Max output
- 128,000 tokens
- Released
- July 9, 2026
Capabilities
Price history
Price-stable since July 12, 2026.
Frequently asked questions
Notes
GPT-5.6 Terra — balanced tier of OpenAI's new three-tier family. GA July 9, 2026. $2.50 input / $15 output per 1M tokens (~2x cheaper than GPT-5.5). Best price-performance sweet spot for most workloads. 90% prompt caching discount. [2026-07-13] Context Window 400,000 → 1,048,576 and Max Output 100,000 → 128,000 — all three GPT-5.6 tiers share 1.05M context / 128K max output per openai.com GPT-5.6 announcement (corroborated by OpenRouter + simonwillison.net). Prices unchanged ($2.50/$15).