GPT-5.6 Terra pricing
GPT-5.6 Terra costs $2 per million input tokens and $12 per million output tokens , with cached input at $0.2. Its context window is 1.05M tokens. Batch requests are discounted 50%.
Price per million tokens
| Input | $2 |
| Cached input | $0.2 |
| Output | $12 |
| Context window | 1.05M tokens |
| Batch discount | −50% |
What it costs in practice
Monthly cost for three common workload shapes, with prompt caching applied.
| Workload | Shape | Per request | Per month |
|---|---|---|---|
| Support chatbot | 1.5k in / 400 out, 100k requests/month, 30% cached | $0.00699 | $699.00 |
| RAG / document Q&A | 12k in / 700 out, 50k requests/month, 60% cached | $0.0194 | $972.00 |
| Coding agent | 25k in / 2.5k out, 20k requests/month, 80% cached | $0.044 | $880.00 |
Model your own workload with caching, batching and tokenizer correction →
Comparable models from other providers
| Model | Provider | Input | Output |
|---|---|---|---|
| Claude Sonnet 5 | Anthropic | $2 | $10 |
| Gemini 3.1 Pro (preview) | $2 | $12 | |
| Grok 4.6 | xAI | $2 | $6 |
| Grok 4.5 | xAI | $2 | $6 |
All figures verified 2026-08-18 against OpenAI's official pricing documentation . Fields the provider does not publish are shown as “—” rather than estimated.