OpenAI's model family behind ChatGPT and the OpenAI API. The current flagship line is GPT-6, in four variants that share a context window of just over one million tokens and range widely in price.
Summary is our draft- Sources checked
- 11 Nov 2026
- Our testing
- Not started
Current lineup
GPT-6 Astra
No provider description captured
gpt-6-astraGPT-6.1 Sol
No provider description captured
gpt-6.1-solGPT-6.1 Terra
No provider description captured
gpt-6.1-terraGPT-6 Luna
No provider description captured
gpt-6-luna
Verified 12 Nov 2026OpenAI: Models (opens in a new tab)
Which one for you
Each line says whether it comes from the provider or is our own judgment from the checked facts. None of it is from our own testing yet.
A sensible default for most API work
GPT-6.1 Sol costs a fifth of GPT-6 Astra per token. Start there and move to Astra only if results fall short.
Our judgment
High-volume, simple jobs
GPT-6 Luna is a hundredth of Astra's price. Test it on your own examples before relying on it.
Our judgment
Everyday personal use
ChatGPT's free plan is enough to learn on. We couldn't read current paid plan prices from OpenAI's page, so check them there.
Our judgment
Key facts
- Knowledge cutoff
- 30 Apr 2026 (GPT-6 Astra); other models differ
- Source, 12 Nov 2026 (opens in a new tab)
By task
We haven't run our own tests yet, so this shows only what the provider claims and the test every family will get. Results will appear here, labelled as ours.
Coding
The provider saysNo specific claim capturedThe test we’ll runRefactor a 400-line TypeScript module with an existing test suite, then fix one failing test.
Writing
The provider saysNo specific claim capturedThe test we’ll runTurn a rough 600-word draft into a 300-word brief without losing any of its facts.
Research
The provider saysNo specific claim capturedThe test we’ll runSummarise three supplied PDFs and cite the page for every claim.
Reasoning
The provider saysNo specific claim capturedThe test we’ll runPlan a five-step project with dependencies and explain which step blocks which.
Pricing and access
Pricing
- GPT-6 Astra
- $10 in / $50 out per million tokensSource, 12 Nov 2026 (opens in a new tab)
- GPT-6.1 Sol
- $2 in / $10 out per million tokens
- GPT-6.1 Terra
- $1 in / $5 out per million tokens
- GPT-6 Luna
- $0.10 in / $0.50 out per million tokens
- App plans
- ChatGPT Free, Go, Plus and Pro: prices: not yet checked
Where you can use it
- Developer platforms
- OpenAI APISource, 12 Nov 2026 (opens in a new tab)
- Consumer apps
- ChatGPT: not yet checked
Before you choose
- OpenAI also lists specialist models (image, realtime voice, transcription). They are outside this profile.
- Knowledge cutoffs differ between the four models, so check the model page for the one you use.
Put it to work
What changed
- 11 Nov 2026Added API prices for all four GPT-6 models from OpenAI's pricing page.
- 11 Nov 2026Removed quoted model descriptions we could not re-read word for word.
Sources
- OpenAI: Models (opens in a new tab)Checked 12 Nov 2026
- OpenAI: GPT-6 Astra (opens in a new tab)Checked 12 Nov 2026
- OpenAI: API pricing (opens in a new tab)Checked 12 Nov 2026