ColinBuilds · Current official OpenAI API pricing
GPT-5.6 Terra
- Input / 1M
- $2.00
- Output / 1M
- $12.00
- OpenAI-published context window
- 1,050,000 tokens
GPT-5.6 Terra / gpt-5.6-terra; OpenAI standard short-context row lists $2.00 input, $0.20 cached input, $2.50 cache writes, and $12.00 output per 1M tokens. Long-context row is $4.00 / $0.40 / $5.00 / $18.00. Unlike Sol, the live pricing table does not label Terra as promotional. · as of August 25, 2026
Compare models
Same per-1M input/output rates as above. Enter your monthly token volumes to compare bills.
GPT-5.6 Terra
- Input: 1M × $2.00 = $2.00
- Output: 1M × $12.00 = $12.00
- Total
- $14.00
GPT-4o
- Input: 1M × $2.50 = $2.50
- Output: 1M × $10.00 = $10.00
- Total
- $12.50
Difference
$1.50
GPT-5.6 Terra costs $1.50 more than GPT-4o.
Popular comparisons
37 total featuring GPT-5.6 Terra.
GPT-5.6 Terra is OpenAI’s balanced GPT-5.6 API model for teams that want strong GPT-5.6 capability at a lower official token price than the Sol tier.
What this model is
OpenAI’s model page describes GPT-5.6 Terra as a GPT-5.6 model designed for workloads that balance intelligence and cost. It roughly corresponds to the mini model tier used in earlier GPT-5 families.
The model supports text and image input with text output. OpenAI’s GPT-5.6 guidance positions Terra as the lower-price strong-performance option between flagship Sol and high-volume Luna.
Pricing notes
The calculator on this page uses OpenAI’s official standard short-context pricing row for gpt-5.6-terra: $2.00 per 1M input tokens and $12.00 per 1M output tokens.
OpenAI’s pricing page also lists cached input at $0.20 per 1M tokens and cache writes at $2.50 per 1M tokens for the standard short-context row. The long-context row is $4.00 input, $0.40 cached input, $5.00 cache writes, and $18.00 output per 1M tokens. The model page says prompts with more than 272K input tokens are priced at 2x input and 1.5x output for the full request. Batch, Flex, and Fast mode have separate official rows. Those figures are noted here but are not used in the top-level calculator fields.
Unlike GPT-5.6 Sol, the live OpenAI pricing table does not attach a promotional end date to Terra. This page treats the listed short-context $2/$12 row as the current standard rate.
Benchmarks and specs
OpenAI’s model page lists GPT-5.6 Terra with a 1,050,000-token context window, a 128,000-token maximum output, and a Feb 16, 2026 knowledge cutoff. It also lists reasoning token support.
No benchmark score is shown until an exact benchmark source and model identity are matched to GPT-5.6 Terra.
Best fit
GPT-5.6 Terra is best for production assistants, coding workflows, research helpers, document analysis, and agent steps where GPT-5.6 quality is useful but Sol-level pricing is not needed for every request.
Use Sol for the hardest quality-first tasks, and use Luna when the priority is very high volume at the lowest GPT-5.6 tier price.