GPT-6 Astra does not carry a separate subscription charge on top of existing ChatGPT plans.
Standard GPT-6 Astra is included in ChatGPT Plus, which costs twenty dollars a month, and in ChatGPT Pro, which costs two hundred dollars a month.
Heavier users can cover additional usage by buying extra credits on top of their plan.
Access within ChatGPT itself is more restricted than the headline price suggests.
The model is documented as GPT-6 Pro within ChatGPT, with chat access rolling out to the Pro tiers at one hundred dollars and two hundred dollars, plus Business and Enterprise.
Plus subscribers are excluded from GPT-6 Pro access within ChatGPT's chat interface.
Coding-focused products are treated separately from the main chat product.
Pro and Business Premium subscribers can use their existing usage allowance for Astra within ChatGPT Work and Codex, OpenAI's coding tool.
Plus and Business Standard subscribers receive only limited Astra usage in Work and Codex, with optional credits available once that allowance runs out.
Enterprise access to GPT-6 Astra is switched off by default, and a workspace administrator must enable it before staff can use it.
API costs
Developers building their own products face metered charges rather than a flat subscription fee.
The application programming interface charges ten dollars per million input tokens and fifty dollars per million output tokens at standard speed, with a faster processing mode doubling both rates.
That pricing works out at two and a half times the current promotional rate for GPT-5.6 Sol, the previous flagship model.
Cached input tokens are charged at one dollar per million, and batch processing is priced at half the standard rate.
GPT-5.6 Sol remains considerably cheaper for firms not yet ready to pay for Astra's extra capability, at four dollars per million input tokens and twenty dollars per million output tokens, with the same one million-token context window.
Overall, the practical cost of GPT-6 depends heavily on which product a user or business accesses it through.
