GPT-6 Astra vs Grok-4.1 Thinking
GPT-6 Astra leads the LLM Stats Score 58.5 to 16.0. Grok-4.1 Thinking is 3.3x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-6 Astra leads the overall LLM Stats Score 58.5 to 16.0, ranking #3 overall.
On price, Grok-4.1 Thinking is roughly 3.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-6 Astra also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-6 Astra
- overall performance matters — it scores 58.5 and ranks #3 on LLM Stats
- your work emphasizes coding and agents — it leads those capability indexes
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Grok-4.1 Thinking
- cost matters — it's about 3.3x cheaper per token
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
22 reported for GPT-6 Astra · 11 for Grok-4.1 Thinking
GPT-6 Astra and Grok-4.1 Thinkingdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-6 Astra ($10.00/1M tokens) is 3.3x more expensive than Grok-4.1 Thinking ($3.00/1M tokens).
For output processing, GPT-6 Astra ($50.00/1M tokens) is 3.3x more expensive than Grok-4.1 Thinking ($15.00/1M tokens).
In conclusion, GPT-6 Astra is more expensive than Grok-4.1 Thinking.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-6 Astra accepts 1,050,000 input tokens compared to Grok-4.1 Thinking's 256,000 tokens. GPT-6 Astra can generate longer responses up to 128,000 tokens, while Grok-4.1 Thinking is limited to 8,000 tokens.
Input capabilities
Documented input modalities across available providers
Both GPT-6 Astra and Grok-4.1 Thinking support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-6 Astra
Grok-4.1 Thinking
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-6 Astra was released on 2026-09-04, while Grok-4.1 Thinking was released on 2025-11-17.
GPT-6 Astra is 10 months newer than Grok-4.1 Thinking.
Sep 4, 2026
1 months ago
9mo newerNov 17, 2025
11 months ago
Knowledge Cutoff
When training data ends
GPT-6 Astra has a documented knowledge cutoff of 2026-04-30, while Grok-4.1 Thinking's cutoff date is not specified.
We can confirm GPT-6 Astra's training data extends to 2026-04-30, but cannot make a direct comparison without Grok-4.1 Thinking's cutoff date.
Apr 2026
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Provider Availability
GPT-6 Astra is available from OpenAI. Grok-4.1 Thinking is available from xAI.
GPT-6 Astra
Grok-4.1 Thinking
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6 Astra and Grok-4.1 Thinking side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6 Astra vs Grok-4.1 Thinking.