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AI conversation model
OpenAI
GPT-5.6

GPT-5.6 Terra

GPT-5.6 Terra targets more complex text and reasoning work, but the maximum output usage required for reliable preauthorization is not yet locked. For now, this page provides verified information and alternative paths only.

Online use is currently unavailable

This page is for reviewing the model's capabilities, use cases, and public references. The model does not appear in the home workbench, and you cannot submit generation tasks with it.

Current status
Blocked by preauthorization
Series position
Advanced GPT-5.6 tier
Generation access
Unavailable
30-second overview
  • Reasoning levels from low through xhigh are confirmed.
  • Search and function tools cannot be enabled together.
  • Generation is unavailable: no requests and no credit charges.

Popular searches: Can I use GPT-5.6 Terra? · What is GPT-5.6 Terra best for? · How much does GPT-5.6 Terra cost?

Examples

Night Sky Club: Opening day coordination

Plan a 90-minute Friday opening for Night Sky Club at the science hall. We have 45 star maps and groups of 12.
Use 3 groups with one coordinator per group. Allocate 12 star maps to each group (36 total) and keep the remaining 9 as spares. 00:00–00:10: welcome and explain the activity. 00:10–00:20: distribute 12 star maps to each group. 00:20–01:05: run the main activity. 01:05–01:20: collect feedback and reusable equipment. 01:20–01:30: clean the science hall and check the inventory.
What should the coordinator check first?
Count the 45 star maps before visitors arrive. Confirm a clear entrance and an accessible work area at the science hall, then give each of the 3 group leads the same timing sheet.

Night Sky Club: Supply budget calculation

Night Sky Club needs 45 star maps at $2.60 each. Add a 10% reserve. Show the arithmetic.
Supplies: 45 × $2.60 = $117.00. Reserve: $117.00 × 0.10 = $11.70. Planned total: $128.70. This is a planning calculation using the supplied prices.
What if we reduce the quantity by one group?
Remove 12 units, leaving 33. Supplies become $85.80; a 10% reserve adds $8.58, for a total of $94.38.

Night Sky Club: Visitor announcement

Write a warm announcement for Night Sky Club, meeting on Friday at the science hall. Mention limited star maps, without promising availability.
Join Night Sky Club this Friday at the science hall. Meet neighbors, learn together, and take part at your own pace. We will share the available star maps across small groups. Supplies are limited, so please check with the welcome desk when you arrive.
Shorten it to an event sign.
Night Sky Club Friday · science hall Welcome! Ask the desk about available star maps and today’s small-group activities.

Night Sky Club: Inventory CSV validation

Write Python to validate Night Sky Club inventory CSV with columns item,quantity. Quantity must be a nonnegative integer.
```python import csv def read_inventory(path): rows = [] with open(path, newline="", encoding="utf-8") as handle: reader = csv.DictReader(handle) if reader.fieldnames != ["item", "quantity"]: raise ValueError("Expected item,quantity columns") for line, row in enumerate(reader, 2): name = row["item"].strip() quantity = row["quantity"].strip() if not name or not quantity.isascii() or not quantity.isdecimal(): raise ValueError(f"Invalid inventory row {line}") rows.append((name, int(quantity))) return rows # Example row: star maps,45 ```
What are two useful validation cases?
The row `star maps,45` should pass. The row `star maps,-1` should raise a ValueError because a negative quantity is outside the stated inventory contract. An empty item should also fail.

Night Sky Club: Coordinator handover note

Create a concise handover note for Night Sky Club: 45 star maps, 3 groups, meeting Friday at science hall.
Handover — Night Sky Club Location: science hall; day: Friday. Inventory: 45 star maps: 36 allocated as 3 groups × 12, with 9 kept as spares. Before opening: count supplies, set the welcome desk, and confirm group leads. During the event: record shortages and visitor questions. After closing: count returns and write one improvement for the next meeting.
Add a useful open question for the next lead.
Ask: “Were 12 star maps per group enough for the activity, and which step created the longest wait?” Record the answer beside the returned inventory count.

Night Sky Club: Participant question response

A visitor asks whether they can join Night Sky Club halfway through the Friday session at science hall. Draft a welcoming but practical reply.
You are welcome to check in at the desk when you arrive. A coordinator can explain the current activity and see whether a group has space and spare star maps. If the activity is already full, we can help you observe or find the next joining point.
What should we avoid saying?
Avoid guaranteeing a place or a set of star maps before checking the group capacity. Keep the reply specific to the science hall session and offer a clear next step: speak with the welcome desk.

At a glance

Is this model right for you?

A detail page does not mean the model is available. Terra stays out of the selector, and neither standard nor streaming messages can be submitted or charged. It is unavailable rather than discontinued.

What it does best
An advanced GPT-5.6 candidate between the lightweight Luna and flagship Sol tiers.
Who it is for
Future evaluation of complex analysis, trade-off decisions, long-form planning, and editorial review.
Why use it on Kyeo AI
Kyeo AI uses a dedicated detail page to document the boundary without enabling requests against an amount that cannot cover the worst case.

Key facts

Quickly evaluate whether this model fits your business use case.

Vendor
OpenAI
Family
GPT-5.6
Reasoning levels
low through xhigh
Tool boundary
Search or functions, not both
Missing requirement
Maximum output-usage bound

Other names

The same model may have different names in official documentation, community discussions, and API integrations. This section brings them together for you.

GPT 5.6 Terra
GPT-5.6 Terra Chat

Common questions

These practical questions focus on the task, input conditions, and result requirements you should confirm before choosing.

Can I use GPT-5.6 Terra?
What is GPT-5.6 Terra best for?
How much does GPT-5.6 Terra cost?
How is GPT-5.6 Terra different from Claude Sonnet 5?

Decision guide

Still deciding? Start with these key decision points.

1
If complex analysis cannot wait

Compare currently available models such as Claude Sonnet 5 and Claude Opus 4.7.

2
If you are tracking Terra

Use this page for status updates rather than inferring context or output limits from the series name.

3
If you are preparing an evaluation

Save one clearly scored sample each for option analysis, editing, and decision memos.

Popular comparisons

Compare common alternatives on the same task to clarify differences in inputs, controls, and cost.

How are Terra and Luna positioned differently?
What available models can replace GPT-5.6 Terra?

Real-world experience

Practical guidance based on public sources, current on-site limits, and representative tasks.

Advanced positioning increases preauthorization risk

Complex tasks can produce longer output, so an average cannot replace a worst-case bound when the limit is unknown.

A higher tier is not a quality guarantee

Choose from real prompts based on accuracy, stability, latency, and cost.

Capabilities

Structured conversation input

The contract supports multi-turn role-based messages.

Tiered reasoning

Four reasoning-effort levels are available in the contract.

Tool use

Web search or function tools are confirmed, but they cannot be combined.

Use cases

Option analysis

Break down constraints and compare several decision paths.

Professional long-form writing

Plan reports, proposals, and review notes.

Complex research questions

Organize evidence, assumptions, and conclusions that still need verification.

Prompt tips

Rank your constraints

Separate must-haves, negotiable conditions, and unknowns.

Request evidence layers

Ask for facts, inferences, and recommendations in separate sections.

Control task scope

Once access opens, compare small samples before expanding to important work.

Why choose it

Its complex-task position is clear.
Its reasoning and tool contract is confirmed.
The status page provides practical alternatives.

What to know first

Generation is currently unavailable on this site.
There is no provable maximum output usage.
Image attachments are not available.

Currently unavailable

This page is for reviewing the model's capabilities, use cases, and public references. The model does not appear in the home workbench, and you cannot submit generation tasks with it. An advanced GPT-5.6 candidate between the lightweight Luna and flagship Sol tiers.

No additional settings are available for this model.

Frequently asked questions

Related models

Still deciding? Take a quick look at these similar alternatives.

Claude Opus 4.8

Claude Opus 4.8 is designed for high-complexity text analysis and consequential writing. Kyeo AI offers text-only chat with up to 20,000 characters per message and an explicit 4,096-token maximum output.

AI conversation model
Token-based pricing

Claude Sonnet 5

Claude Sonnet 5 is the more balanced Claude candidate in this batch for research, code explanation, and structured writing. Its maximum output on this site is 4,096 tokens.

AI conversation model
Token-based pricing

Claude Opus 5

Claude Opus 5 is a flagship candidate for high-complexity text work. Kyeo AI limits each message to 20,000 characters, includes the 40 most recent submitted messages, and caps output at 4,096 tokens.

AI conversation model
Token-based pricing

Sources

This page is based on vendor materials, model-family documentation, and Kyeo AI integration settings.

Source note

GPT-5.6 Terra's conversation, reasoning, tool, and token-rate contract is confirmed. Because there is no provable maximum output-usage bound, this site keeps runtime access disabled.

Last updated: 2026-08-11
Current GPT-5.6 Terra site specifications
Integration

Records verified capabilities, rates, and the unmet preauthorization requirement.