OpenAI: GPT-5.6 Terra
The OpenAI GPT-5.6 Terra is a general-purpose AI model that can process multiple input formats: text, images, and files. It has a large context length of 1 million tokens, allowing it to handle complex inputs and conversations. Additionally, this model supports various tools and reasoning capabilities, but does not provide structured output. Those on a budget may want to consider the OpenAI GPT-5.6 Terra for its relatively high benchmark score of 71.1 across one independent benchmark. However, with a price point of $2.0 per million input tokens and $12.0 per million output tokens, it may not be the most cost-effective option. As such, users who prioritize performance over budget may want to shortlist this model for its competitive benchmark standing.
Benchmark results
Independent, published benchmarks. Blended score 71.1 across 1 benchmark, last refreshed 2026-10-08. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 69.4 |
- Model ID
- openai/gpt-5.6-terra
- Vendor
- openai
- Released
- July 2026
- Tokenizer
- GPT
- Input Modalities
- file, image, text
- Output Modalities
- text
- Max Output
- 128,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $2.00/M input and $12.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.08 |
| Classify 1,000 customer emails | 500k in / 50k out | $1.60 |
| A month of a busy support chatbot | 5M in / 2M out | $34.00 |
Price & spec history
Tracked daily by PicksByModel since 2026-07-17.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 2026-08-18 | $2.00 | $12.00 | 1,050,000 |
| 2026-07-31 | $1.00 | $6.00 | 1,050,000 |
| 2026-07-28 | $1.25 | $7.50 | 1,050,000 |
| 2026-07-17 | $2.50 | $15.00 | 1,050,000 |
Similar models
OpenAI: GPT-6.1 Sol Pro
OpenAI: GPT-6.1 Sol
OpenAI: GPT-6 Luna Pro
OpenAI: GPT-6 Luna Pro (batch)
OpenAI: GPT-6 Luna
OpenAI: GPT-6 Luna (batch)
Quick answers
- How much does OpenAI: GPT-5.6 Terra cost?
- $2.00 per million input tokens and $12.00 per million output tokens.
- What is OpenAI: GPT-5.6 Terra's context window?
- 1,050,000 tokens, roughly 1,575 pages of text in a single request.
- Does OpenAI: GPT-5.6 Terra support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can OpenAI: GPT-5.6 Terra process images?
- Yes, it accepts image input.