Model Comparison → OpenAI

GPT-5.6 Terra

GPT-5.6 Terra by OpenAI. Input: $2.00/M tokens · Output: $12.00/M tokens · 1000K context window.

✓ Vision✓ Tool use✓ Prompt caching✗ ReasoningStandard
Pricing (verified 2026-10-23)
TypePrice / 1M tokensNotes
Input$2.00Per 1M input tokens
Output$12.00Per 1M output tokens
Cache read$0.20Cached prefix read-back
Source: OpenAI official pricing page · Last verified 2026-10-23
Context Window
1M tokens
≈ 750K words · 3 pages of text

Calculate your GPT-5.6 Terra costs

Prompt Cost Calculator
Exact cost for your prompt
Agent Cost Calculator
Multi-step agent loops
Prompt Caching Calculator
Caching savings
Conversation Cost
Chat history strategies

Other OpenAI models

GPT-5.4 — $2.50/MGPT-5 mini — $0.25/MGPT-4o — $2.50/M

Pricing verified 2026-10-23 from OpenAI official pricing. All prices in USD per 1M tokens. See methodology and price changelog.