Cheaper overall
Grok-4.7
85% lower blended rate
Higher benchmark scores
GPT-6 Astra
leads on 5 of 8 figures
Bigger context window
GPT-6 Astra
1,050,000 vs 500,000 tokens
Cheaper cached input
Grok-4.7
$0.50 vs $1.00, 50% less
Where each one wins
Grok-4.7
- Cheaper input tokens $2.00 vs $10.00, 80% less
- Cheaper output tokens $6.00 vs $50.00, 88% less
- Cheaper cached input $0.50 vs $1.00, 50% less
- Cheaper on all four workloads
- Higher scientific coding (SciCode) 57.4 vs 56.5
- Higher real-world task performance (GDPval) 59.8 vs 52.1
- Higher answer reliability (Omniscience Non-Hallucination) 70.7 vs 48.7
GPT-6 Astra
- Larger context window 1,050,000 tokens
- Higher overall intelligence (Intelligence Index) 52.7 vs 46.4
- Higher expert-exam performance (Humanity's Last Exam) 54.7 vs 43.1
- Higher long-context reasoning (AA-LCR) 80.7 vs 76.7
- Ahead on 2 more benchmark figures
- Offers Batch, Flex and Priority pricing not listed for Grok-4.7
What four workloads cost
One run, and the same run a thousand times.
Grok-4.7 is cheaper on all four workloads, by much the same margin each time — about 5.3 times, from $0.0050 against $0.0350 on a chat turn to $1.64 against $8.23 on a long document.
| Workload | Grok-4.7 | GPT-6 Astra | ×1,000 | Difference |
|---|---|---|---|---|
| Chat turn 1,000 in / 500 out | $0.0050 | $0.0350 | $5.00 / $35.00 | Grok-4.7 is 86% cheaper |
| RAG answer 10,000 in / 800 out | $0.0248 | $0.1400 | $24.80 / $140.00 | Grok-4.7 is 82% cheaper |
| Agent loop 32,000 in / 700 out × 20 calls | $0.4640 | $1.70 | $464.00 / $1,700.00 | Grok-4.7 is 73% cheaper |
| Long document 400,000 in / 3,000 out | $1.64 | $8.23 | $1,636.00 / $8,225.00 | Grok-4.7 is 80% cheaper |
Price per 1M tokens
Above 199,999 input tokens the rates change, and the new rate applies to the whole request, not just the tokens past that point: Grok-4.7's input goes from $2.00 to $4.00. It does not change which of the two is cheaper.
| Context band | Price | Grok-4.7 | GPT-6 Astra | Difference |
|---|---|---|---|---|
| Prompts up to 199,999 tokens | Input | $2.00 | $10.00 | Grok-4.7 is 80% cheaper |
| Prompts up to 199,999 tokens | Cached input | $0.50 | $1.00 | Grok-4.7 is 50% cheaper |
| Prompts up to 199,999 tokens | Output | $6.00 | $50.00 | Grok-4.7 is 88% cheaper |
| Prompts up to 200,000 tokens | Input | $4.00 | $10.00 | Grok-4.7 is 60% cheaper |
| Prompts up to 200,000 tokens | Cached input | $1.00 | $1.00 | Same |
| Prompts up to 200,000 tokens | Output | $12.00 | $50.00 | Grok-4.7 is 76% cheaper |
| Prompts up to 272,000 tokens | Input | $4.00 | $10.00 | Grok-4.7 is 60% cheaper |
| Prompts up to 272,000 tokens | Cached input | $1.00 | $1.00 | Same |
| Prompts up to 272,000 tokens | Output | $12.00 | $50.00 | Grok-4.7 is 76% cheaper |
| Prompts over 272,000 tokens | Input | $4.00 | $20.00 | Grok-4.7 is 80% cheaper |
| Prompts over 272,000 tokens | Cached input | $1.00 | $2.00 | Grok-4.7 is 50% cheaper |
| Prompts over 272,000 tokens | Output | $12.00 | $75.00 | Grok-4.7 is 84% cheaper |
Blended: Grok-4.7 $3.00, GPT-6 Astra $20.00 per 1M — one rate at 3:1 input to output, for comparing two models at a glance.
Grok-4.7 priced by Perplexity, GPT-6 Astra by OpenAI. Standard tier, pay-as-you-go.
Other pricing tiers
Only GPT-6 Astra lists Batch, Flex and Priority, at up to 50% off its own standard rate; Grok-4.7 offers none of them.
Every tier either model sells is here, so this is the whole price sheet. A saving is measured against that model's own standard rate — how we read tiers.
| Tier | Grok-4.7 | GPT-6 Astra | Cheaper |
|---|---|---|---|
| Batch only on GPT-6 Astra | Not offered | $5.00 in / $25.00 out 50% off Standard | — |
| Flex only on GPT-6 Astra | Not offered | $5.00 in / $25.00 out 50% off Standard | — |
| Priority only on GPT-6 Astra | Not offered | $20.00 in / $100.00 out | — |
Benchmarks
They share 8 figures: Grok-4.7 leads on 3, GPT-6 Astra on 5. The widest gap is 22 points, on answer reliability (Omniscience Non-Hallucination).
Overall intelligence
Intelligence Index — Overall intelligence across reasoning, knowledge & math evals
GPT-6 Astra ahead by 6.3
Expert-exam performance
Humanity's Last Exam — Expert-level questions across many academic domains
GPT-6 Astra ahead by 11.6
Long-context reasoning
AA-LCR — Long-context reasoning across large inputs
GPT-6 Astra ahead by 4
Scientific coding
SciCode — Research-level scientific coding tasks
Grok-4.7 ahead by 0.9
Physics research reasoning
CritPt — Unpublished physics research reasoning problems
GPT-6 Astra ahead by 14
Real-world task performance
GDPval — Economically valuable, real-world knowledge work
Grok-4.7 ahead by 7.7
Factual accuracy
Omniscience Accuracy — Breadth of factual knowledge across domains
GPT-6 Astra ahead by 15.2
Answer reliability
Omniscience Non-Hallucination — How reliably the model avoids fabricated answers
Grok-4.7 ahead by 22
Each figure is that model's best published run, with the effort level named beside it — where these scores come from.
Specifications
GPT-6 Astra holds 550,000 more input tokens in one request. Only GPT-6 Astra lists web search and computer use.
| Specification | Grok-4.7 | GPT-6 Astra |
|---|---|---|
| Context window | 500,000 tokens | 1,050,000 tokens |
| Max output | — | 128,000 tokens |
| Takes in | Text, image, file | Text, image, file |
| Puts out | Text | Text |
| Knowledge cutoff | 31 May 2026 | 30 Apr 2026 |
| Released | 21 Sep 2026 | 3 Sep 2026 |
| Status | Active | Active |
| Sold by | Perplexity | OpenAI |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Web search | Not listed | Yes |
| Prompt caching | Yes | Yes |
| Code execution | Yes | Yes |
| Computer use | Not listed | Yes |
| Open weights | Not listed | Not listed |
| Reasoning | Yes | Yes |
FAQs
- Is Grok-4.7 cheaper than GPT-6 Astra?
- Yes. A 1,000-token prompt with a 500-token reply costs $0.0050 on Grok-4.7 and $0.0350 on GPT-6 Astra, and the same model is cheaper on every workload on this page.
- How much do Grok-4.7 and GPT-6 Astra cost per 1M tokens?
- Grok-4.7 costs $2.00 for input and $6.00 for output. GPT-6 Astra costs $10.00 and $50.00. Standard pay-as-you-go rates, as of 23 Sep 2026.
- Which is better, Grok-4.7 or GPT-6 Astra?
- On published benchmarks, GPT-6 Astra. It leads on 5 of the 8 figures both models report, including overall intelligence (Intelligence Index), where it scores 52.7 against 46.4.
- Does Grok-4.7 or GPT-6 Astra offer batch pricing?
- GPT-6 Astra only. Its batch input costs $5.00, 50% off its standard rate, and Grok-4.7 lists no batch tier at all.
- Does Grok-4.7 or GPT-6 Astra have a bigger context window?
- GPT-6 Astra, at 1,050,000 tokens against 500,000. That is 550,000 more input tokens in a single request.