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SpaceXAI Releases Grok 4.7, Positioning It Against Fable 5.1 and GPT-6 Astra on Coding and Agentic Work

September 21, 2026 at 16:46 EDT

Foundation Models
AI Agents
Software Dev & Coding

SpaceXAI released Grok 4.7 on September 21, presenting it as its strongest model yet for coding, agentic tasks and professional knowledge work. The launch gives developers a new frontier-class option at the same base API price as Grok 4.6, while early hands-on comparisons, including a shared flight-simulator prompt, have put it directly against models such as Astra, Kimi and Fable in practical app-building tests.

Sep. 21, 2026 · SpaceXAI

Grok 4.7 Enters the Coding-Agent Race

The new model improves on Grok 4.6 and reaches frontier-class agentic scores, while still trailing Fable 5.1 on CursorBench and using substantially more output tokens than GPT-6 Astra in independent testing.

46.3%

Grok 4.7 Extra High on CursorBench 4.0

500k

API context window in tokens

$2 / $6

Input and output price per 1M tokens

Artificial Analysis Coding Agent Index

CursorBench 4.0: close, but not first

40.4%Grok 4.6 High

46.3%Grok 4.7 Extra High

51.8%Fable 5.1 Max

The cost question shifts to tokens

27kGPT-6 Astra

81kGrok 4.7

Artificial Analysis measured roughly three times as many output tokens per Intelligence Index task for Grok 4.7 as for GPT-6 Astra.

Why developers are interested

Stronger coding-agent scores, a low base token price and practical app-building behavior make Grok 4.7 a credible option for long interactive tasks.

What limits the claim

It trails Fable 5.1 Max on CursorBench and its best independent gains come with much heavier token use.

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