Model comparison

GPT-6 Astra vs Grok 4.7: price, context and specs

Q: Which has the bigger context window?

GPT-6 Astra: 1,050,000 tokens in OpenAI's API, versus 500,000 tokens for Grok 4.7.

Q: Which model is better at coding?

We have not run independent tests. Vendor-published benchmarks are self-reported and use different setups; xAI's Grok 4.7 announcement compares against other models on its own chosen benchmarks. Test both on your own codebase.

Updated October 2, 2026 · Facts checked October 2, 2026 · By the dotaimodel team · How we research

Short answer

Grok 4.7 is far cheaper — $2/$6 per million input/output tokens vs $10/$50 for GPT-6 Astra^{[4] source: OpenAI API docs[13] source: SpaceXAI (xAI)}. Astra has the larger context window (1.05M vs 500K tokens)^{[4] source: OpenAI API docs[15] source: AWS Machine Learning Blog} and an extra “max” reasoning level^{[4] source: OpenAI API docs}. Prices as of October 2, 2026.

Spec-by-spec comparison

Released

GPT-6 Astra (OpenAI): September 3, 2026^{[2] source: OpenAI Deployment Safety Hub}
Grok 4.7 (xAI)OUR PICK: September 21, 2026^{[13] source: SpaceXAI (xAI)}

Input price / 1M

GPT-6 Astra (OpenAI): $10^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: $2^{[13] source: SpaceXAI (xAI)}

Output price / 1M

GPT-6 Astra (OpenAI): $50^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: $6^{[13] source: SpaceXAI (xAI)}

Cached input / 1M

GPT-6 Astra (OpenAI): $1^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: Not stated on xAI’s announcement

Long-context pricing

GPT-6 Astra (OpenAI): >272K input: 2× input, 1.5× output^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: Not stated on xAI’s announcement

Faster tier

GPT-6 Astra (OpenAI): Fast mode at 2× price^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: Fast variant: 2× output speed at 2× price^{[13] source: SpaceXAI (xAI)}

Context window

GPT-6 Astra (OpenAI): 1,050,000 tokens^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: 500,000 tokens^{[15] source: AWS Machine Learning Blog}

Reasoning levels

GPT-6 Astra (OpenAI): low, medium, high, xhigh, max^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: low, medium, high, xhigh^{[15] source: AWS Machine Learning Blog}

Inputs

GPT-6 Astra (OpenAI): Text, image^{[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: Text, image^{[15] source: AWS Machine Learning Blog}

Where available

GPT-6 Astra (OpenAI): OpenAI API; powers ChatGPT dots^{[1] source: OpenAI (ChatGPT Learn)[4] source: OpenAI API docs}
Grok 4.7 (xAI)OUR PICK: xAI API, Cursor, Grok Build, Amazon Bedrock and other platforms^{[13] source: SpaceXAI (xAI)[15] source: AWS Machine Learning Blog}

GPT-6 Astra vs Grok 4.7 — official specs
	GPT-6 Astra (OpenAI)	Grok 4.7 (xAI)Our pick
Released	September 3, 2026^{[2] source: OpenAI Deployment Safety Hub}	September 21, 2026^{[13] source: SpaceXAI (xAI)}
Input price / 1M	$10^{[4] source: OpenAI API docs}	$2^{[13] source: SpaceXAI (xAI)}
Output price / 1M	$50^{[4] source: OpenAI API docs}	$6^{[13] source: SpaceXAI (xAI)}
Cached input / 1M	$1^{[4] source: OpenAI API docs}	Not stated on xAI’s announcement
Long-context pricing	>272K input: 2× input, 1.5× output^{[4] source: OpenAI API docs}	Not stated on xAI’s announcement
Faster tier	Fast mode at 2× price^{[4] source: OpenAI API docs}	Fast variant: 2× output speed at 2× price^{[13] source: SpaceXAI (xAI)}
Context window	1,050,000 tokens^{[4] source: OpenAI API docs}	500,000 tokens^{[15] source: AWS Machine Learning Blog}
Reasoning levels	low, medium, high, xhigh, max^{[4] source: OpenAI API docs}	low, medium, high, xhigh^{[15] source: AWS Machine Learning Blog}
Inputs	Text, image^{[4] source: OpenAI API docs}	Text, image^{[15] source: AWS Machine Learning Blog}
Where available	OpenAI API; powers ChatGPT dots^{[1] source: OpenAI (ChatGPT Learn)[4] source: OpenAI API docs}	xAI API, Cursor, Grok Build, Amazon Bedrock and other platforms^{[13] source: SpaceXAI (xAI)[15] source: AWS Machine Learning Blog}

GPT-6 Astra vs Grok 4.7 — official specs — as of October 2, 2026. Bracketed numbers link to sources. “Not stated” means we could not find an official figure.

What does the price gap mean in practice?

Simple arithmetic from list prices: a job using 1 million input tokens and 200,000 output tokens would cost $10 + $10 = $20 on GPT-6 Astra and $2 + $1.20 = $3.20 on Grok 4.7 at standard rates, before caching or batch discounts^{[4] source: OpenAI API docs[13] source: SpaceXAI (xAI)}. Real costs depend on how many tokens each model uses for the same task, which varies.

When to choose which

Grok 4.7 for cost-sensitive agents, coding and knowledge work at volume; xAI positions it for “coding and knowledge work” and long-running tasks^{[13] source: SpaceXAI (xAI)}.
GPT-6 Astra when you need the 1M+ context window, the “max” reasoning setting, or OpenAI-specific tooling such as computer use and hosted shell in the Responses API^{[4] source: OpenAI API docs}.

Frequently asked questions

Is Grok 4.7 cheaper than GPT-6 Astra?

Yes. At standard rates as of October 2, 2026, Grok 4.7 lists $2/$6 per million input/output tokens^{[13] source: SpaceXAI (xAI)} versus $10/$50 for GPT-6 Astra^{[4] source: OpenAI API docs}.

Which has the bigger context window?

GPT-6 Astra — 1,050,000 tokens^{[4] source: OpenAI API docs} versus 500,000 for Grok 4.7^{[15] source: AWS Machine Learning Blog}.

Which model is better at coding?

We haven’t run independent tests. xAI’s Grok 4.7 announcement publishes self-reported benchmark comparisons^{[13] source: SpaceXAI (xAI)}; treat vendor benchmarks as claims and test on your own codebase.

Sources for this page

[1]Meet dots — OpenAI (ChatGPT Learn) (accessed 2026-10-02)
[2]GPT-6 Astra System Card — OpenAI Deployment Safety Hub, 2026-09-03 (accessed 2026-10-02)
[4]GPT-6 Astra model page — OpenAI API docs (accessed 2026-10-02)
[12]Grok Bot — AI teammates that finish the work (product & pricing page) — SpaceXAI (xAI) (accessed 2026-10-02)
[13]Introducing Grok 4.7 — SpaceXAI (xAI), 2026-09-21 (accessed 2026-10-02)
[14]Grok — product overview — SpaceXAI (xAI) (accessed 2026-10-02)
[15]Grok 4.7 is now available on Amazon Bedrock — AWS Machine Learning Blog, 2026-09-28 (accessed 2026-10-02)

All sources →