OpenAI › GPT-5.6 Terra › Pricing
$2 / $12per 1M tokens in / out
$0.20cache read · −90%
$0.18per task at medium?
#62on OpenRouter by tokens · 227.6B / week
Price sheetper 1M tokens
| Input | $2 | list |
| Output | $12 | |
| Cache read | $0.20 | −90% vs input |
| Cache write | $2.50 | +25% vs input |
| Context · max output | 1.1M · 128K | tokens |
Cost per task by effort?
non-thinking$0.1411.4
low$0.1429.2
mediumAPI default$0.1833.3
high$0.3438.5
xhigh$0.6341.9
max$1.4042.9
per taskHumanity's Last Exam
Same price per token at every effort; the bill grows with reasoning tokens. max costs 7.6× medium for +9.6 points.
Where to buy3 providers · per 1M tokens
| Provider | Input | Output | Context |
|---|---|---|---|
| Azure | $2 | $12 | 1.1M |
| OpenAIlab | $2 | $12 | 1.1M |
| Amazon Bedrock | $2.20 | $13.20 | 1.1M |
In OpenAI's line-upper 1M in / out
| GPT-4o (2024-08-06) | $2.50 / $10 | −3% |
| GPT-4o (2024-11-20) | $2.50 / $10 | −3% |
| GPT-4o Transcribe Diarize | $2.50 / $10 | −3% |
| GPT-5.6 Terra | $2 / $12 | this model |
| GPT-5.2 (2025-12-11) | $1.75 / $14 | +7% |
| GPT-5.4 (2026-03-05) | $2.50 / $15 | +25% |
| GPT-4o (2024-05-13) | $5 / $15 | +67% |
Cheaper for the same workvs GPT-5.6 Terra at medium
| MiMo v2.6 Pro thinkingOpen | -27% | score +54% | $0.13 |
| GPT-6.1 Sol low | -29% | score +40% | $0.13 |
| Claude Haiku 5.5 xhigh | -32% | score +37% | $0.12 |
| GPT-6 Luna max | -63% | score +27% | $0.068 |
| MiMo v2.6 Flash thinkingOpen | -66% | score +26% | $0.062 |
Pricing questions
How much does GPT-5.6 Terra cost?›
$2 per 1M input tokens and $12 per 1M output tokens. Cached input is $0.20. One Intelligence Index task costs about $0.18 at the default effort.
Is GPT-5.6 Terra free to use?›
There is no free API tier.
How much does prompt caching save?›
Cache reads cost $0.20 per 1M, 90% below the input price. Writing to the cache costs $2.50 per 1M.
Is GPT-5.6 Terra cheaper than GPT-3.5 Turbo?›
No: $2 / $12 against $0.50 / $1.50, 500% more per token.
How does effort change the price?›
The price per token is the same at every effort. Higher effort spends more reasoning tokens: a task costs $0.14 at non-thinking, $0.14 at low, $0.18 at medium, $0.34 at high, $0.63 at xhigh, $1.40 at max.
What is a cheaper alternative to GPT-5.6 Terra?›
MiMo v2.6 Pro at thinking effort costs -27% per task with a score +54% on Humanity's Last Exam.