Grok 4.7 vs Fable 5.1 vs GPT-6 Astra on independent tests: who scores highest, who's cheapest per task, and which to use for coding, research and agents.
Key takeaways
- On the independent Artificial Analysis Intelligence Index, Fable 5.1 and GPT-6 Astra tie at 53 at their top settings. Grok 4.7 scores 46.
- Grok 4.7 lists at $2 input and $6 output per million tokens. Fable 5.1 and GPT-6 Astra both list at $10 and $50.
- Per task, the picture flips. At the high setting, Astra costs $1.73 per task, Grok 4.7 $2.73 and Fable 5.1 $3.91.
- Fable 5.1 leads knowledge-work tasks, long context and hard questions. Astra leads terminal work, automation and research physics. Grok 4.7 wins none of the ten tests outright.
- Grok 4.7 still makes sense for input-heavy, low-reasoning work, where its low per-token price does carry through.
📖 Read the full guide on Van Data Team → Grok 4.7 vs Fable 5.1 vs GPT-6 Astra: Real Cost per Task
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