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GPT 6 Astra Pro vs Grok 4.1 Fast

At a glance

OpenAI's GPT-6 Astra served in pro reasoning mode for the hardest problems.

1.1M ctx$10.00/$50.00 per M

Fast agentic model with 2M context window and tool calling.

2M ctx
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
No benchmarks available

This model hasn't been benchmarked yet.

Specs
1.1M
Context
128K
Max output
Sep 2026
Released
2M
Context
33K
Max output
—
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$1.00/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
Pricing not available
Chat with GPT 6 Astra ProGo to model
Chat with Grok 4.1 FastGo to model
Frequently Asked Questions: GPT 6 Astra Pro vs Grok 4.1 Fast▼

Which is better, GPT 6 Astra Pro or Grok 4.1 Fast?

▼

Both GPT 6 Astra Pro and Grok 4.1 Fast are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which has a larger context window, GPT 6 Astra Pro or Grok 4.1 Fast?

▼

Grok 4.1 Fast has a larger context window: GPT 6 Astra Pro supports 1.1M tokens vs Grok 4.1 Fast at 2M tokens.

Do both GPT 6 Astra Pro and Grok 4.1 Fast support vision?

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Yes, both GPT 6 Astra Pro and Grok 4.1 Fast support vision/image input.

What are the key differences between GPT 6 Astra Pro and Grok 4.1 Fast?

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Key differences: only GPT 6 Astra Pro offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT 6 Astra Pro and Grok 4.1 Fast for free on idapt.app to see which performs better for your specific needs.

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