GPT-6.1 Terra vs GPT-6 Luna
API price, context window and output limit for GPT-6.1 Terra and GPT-6 Luna from Kingy's checked data, and what common workloads cost on each. Every price shows when Kingy last checked it.
At a glance
Verdict: Kingy cannot confirm both prices right now. In Kingy's tests, both passed 20/20 on Kingy's coding and data tasks, and GPT-6 Luna's bill was 8.4× lower ($0.0031 against $0.026).
- GPT-6.1 Terra and GPT-6 Luna: prices are not confirmed right now, so Kingy shows no price comparison. Use the official links in the table.
- Same context window: 1.05M tokens.
- Same output limit: up to 128K tokens per request.
| Measure | GPT-6.1 Terra | GPT-6 Luna |
|---|---|---|
| Provider | OpenAI | OpenAI |
| API price | Not confirmed right now. Check the official page | Not confirmed right now. Check the official page |
| Context window | 1.05M tokens | 1.05M tokens |
| Max output | 128K tokens | 128K tokens |
| Availability | Generally available | Generally available |
| Retirement | None listed in Kingy AI Deadlines | None listed in Kingy AI Deadlines |
| Price check | Human-reviewedChecked Nov 12, 19:43 UTC | Human-reviewedChecked Nov 12, 19:43 UTC |
| Official sources | developers.openai.com › gpt-6.1-terra developers.openai.com › pricing developers.openai.com › prompt-caching | developers.openai.com › gpt-6-luna developers.openai.com › pricing developers.openai.com › prompt-caching |
Larger is not always better: a bigger context window or output limit only matters if your work needs it. These figures compare price and limits, not answer quality.
What common workloads cost
At 10,000 requests a month, standard list rates. Change the numbers in the tool below for your own usage.
| Measure | GPT-6.1 Terra | GPT-6 Luna |
|---|---|---|
| Chat reply2,000 in / 500 out | Price not confirmed right now | Price not confirmed right now |
| Coding agent step30,000 in / 2,000 out | Price not confirmed right now | Price not confirmed right now |
| Long document summary150,000 in / 1,500 out | Price not confirmed right now | Price not confirmed right now |
| Classify short text300 in / 20 out | Price not confirmed right now | Price not confirmed right now |
Excludes prompt-cache discounts, batch and priority pricing, regional rates, tool fees and tax. Reasoning tokens count as output, so a model that thinks longer costs more per request than these figures show.
What Kingy measured
Kingy's own runs, not vendor claims. These are small tests: read each one for its tasks and limits before generalising. All results are also on the AI Model Board.
| Test | GPT-6.1 Terra | GPT-6 Luna |
|---|---|---|
| AI Accuracy Index: 125 official figures from memory, 2 asks each | Right 59%, wrong 6.0%, not sure 35%2026-11-10 · read the test | Not tested by Kingy |
| Kingy's four coding and data tasks, 5 tries each | 20/20 passed · Kingy's bill $0.025912026-11-09 · read the test | 20/20 passed · Kingy's bill $0.003082026-11-09 · read the test |
More from Kingy on these models
- GPT-6.1 Terra: Benchmarks, Pricing, Specs, and How It Compares
- GPT-6 Luna vs Gemini 3.8 Flash: Prices, Specs and Benchmarks
- GPT-6 Sol vs Luna: Specs, Pricing & Benchmarks
- GPT-6.1 Sol and GPT-6 Luna vs Claude Haiku 5.5: Specs, Benchmarks and Real Costs
Compare other models
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Side by side
What would it cost you?
Standard list rates only. Excludes prompt-cache discounts, batch and priority pricing, regional rates, tool fees and tax. Reasoning tokens count as output. A long-context rate applies when one request's input passes the model's threshold.
Prices of other AI models
See the checked prices of all the main AI models in one table, or pick any two models in the tool above.
How this works
Prices come from the same checked data behind Kingy's AI cost calculator and the Kingy Facts API. OpenAI, Anthropic and Google prices are reviewed by a person and re-checked against the official pricing page every few hours. Prices for other providers are read automatically from their official pricing pages by fixed rules, and the table says so.
"Not confirmed right now" means Kingy could not confirm the price within its check window, so it shows no number. Use the official link instead. Retirement dates come from Kingy AI Deadlines. Every source re-check is logged in the public accuracy ledger.
Why isn't my model listed?
Only models with a tracked official price page are listed. Embedding, rerank and moderation models are left out because they have no output price to compare.
Does this show benchmarks?
It shows Kingy's own tests when a model has been through them: the AI Accuracy Index and Kingy's coding and data tasks. These are small tests, so read each one for its tasks and limits before generalising. Vendor benchmarks are left out, because results depend on the test and settings used; Kingy's full comparisons cover them when one exists for your pair.
Popular comparisons
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