Cheaper overall
Grok-4.7
63% lower blended rate
Higher benchmark scores
GPT-5.6 Sol
leads on 6 of 8 figures
Bigger context window
GPT-5.6 Sol
1,050,000 vs 500,000 tokens
Cheaper cached input
GPT-5.6 Sol
$0.40 vs $0.50, 20% less
Where each one wins
Grok-4.7
- Cheaper input tokens $2.00 vs $4.00, 50% less
- Cheaper output tokens $6.00 vs $20.00, 70% less
- Cheaper on all four workloads
- Higher real-world task performance (GDPval) 59.8 vs 54.4
- Higher answer reliability (Omniscience Non-Hallucination) 70.7 vs 10.6
GPT-5.6 Sol
- Cheaper cached input $0.40 vs $0.50, 20% less
- Larger context window 1,050,000 tokens
- Higher overall intelligence (Intelligence Index) 47 vs 46.4
- Higher expert-exam performance (Humanity's Last Exam) 49.5 vs 43.1
- Higher long-context reasoning (AA-LCR) 84 vs 76.7
- Ahead on 3 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 2.1 times, from $0.0050 against $0.0140 on a chat turn to $1.64 against $3.29 on a long document.
| Workload | Grok-4.7 | GPT-5.6 Sol | ×1,000 | Difference |
|---|---|---|---|---|
| Chat turn 1,000 in / 500 out | $0.0050 | $0.0140 | $5.00 / $14.00 | Grok-4.7 is 64% cheaper |
| RAG answer 10,000 in / 800 out | $0.0248 | $0.0560 | $24.80 / $56.00 | Grok-4.7 is 56% cheaper |
| Agent loop 32,000 in / 700 out × 20 calls | $0.4640 | $0.6800 | $464.00 / $680.00 | Grok-4.7 is 32% cheaper |
| Long document 400,000 in / 3,000 out | $1.64 | $3.29 | $1,636.00 / $3,290.00 | Grok-4.7 is 50% 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-5.6 Sol | Difference |
|---|---|---|---|---|
| Prompts up to 199,999 tokens | Input | $2.00 | $4.00 | Grok-4.7 is 50% cheaper |
| Prompts up to 199,999 tokens | Cached input | $0.50 | $0.40 | GPT-5.6 Sol is 20% cheaper |
| Prompts up to 199,999 tokens | Output | $6.00 | $20.00 | Grok-4.7 is 70% cheaper |
| Prompts up to 200,000 tokens | Input | $4.00 | $4.00 | Same |
| Prompts up to 200,000 tokens | Cached input | $1.00 | $0.40 | GPT-5.6 Sol is 60% cheaper |
| Prompts up to 200,000 tokens | Output | $12.00 | $20.00 | Grok-4.7 is 40% cheaper |
| Prompts up to 272,000 tokens | Input | $4.00 | $4.00 | Same |
| Prompts up to 272,000 tokens | Cached input | $1.00 | $0.40 | GPT-5.6 Sol is 60% cheaper |
| Prompts up to 272,000 tokens | Output | $12.00 | $20.00 | Grok-4.7 is 40% cheaper |
| Prompts over 272,000 tokens | Input | $4.00 | $8.00 | Grok-4.7 is 50% cheaper |
| Prompts over 272,000 tokens | Cached input | $1.00 | $0.80 | GPT-5.6 Sol is 20% cheaper |
| Prompts over 272,000 tokens | Output | $12.00 | $30.00 | Grok-4.7 is 60% cheaper |
Blended: Grok-4.7 $3.00, GPT-5.6 Sol $8.00 per 1M — one rate at 3:1 input to output, for comparing two models at a glance.
Grok-4.7 priced by Perplexity, GPT-5.6 Sol by OpenAI. Standard tier, pay-as-you-go.
Other pricing tiers
Only GPT-5.6 Sol 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-5.6 Sol | Cheaper |
|---|---|---|---|
| Batch only on GPT-5.6 Sol | Not offered | $2.00 in / $10.00 out 50% off Standard | — |
| Flex only on GPT-5.6 Sol | Not offered | $2.00 in / $10.00 out 50% off Standard | — |
| Priority only on GPT-5.6 Sol | Not offered | $8.00 in / $40.00 out | — |
Benchmarks
They share 8 figures: Grok-4.7 leads on 2, GPT-5.6 Sol on 6. The widest gap is 60.1 points, on answer reliability (Omniscience Non-Hallucination).
Overall intelligence
Intelligence Index — Overall intelligence across reasoning, knowledge & math evals
GPT-5.6 Sol ahead by 0.6
Expert-exam performance
Humanity's Last Exam — Expert-level questions across many academic domains
GPT-5.6 Sol ahead by 6.4
Long-context reasoning
AA-LCR — Long-context reasoning across large inputs
GPT-5.6 Sol ahead by 7.3
Scientific coding
SciCode — Research-level scientific coding tasks
GPT-5.6 Sol ahead by 0.4
Physics research reasoning
CritPt — Unpublished physics research reasoning problems
GPT-5.6 Sol ahead by 14.6
Real-world task performance
GDPval — Economically valuable, real-world knowledge work
Grok-4.7 ahead by 5.4
Factual accuracy
Omniscience Accuracy — Breadth of factual knowledge across domains
GPT-5.6 Sol ahead by 12
Answer reliability
Omniscience Non-Hallucination — How reliably the model avoids fabricated answers
Grok-4.7 ahead by 60.1
Each figure is that model's best published run, with the effort level named beside it — where these scores come from.
Specifications
GPT-5.6 Sol holds 550,000 more input tokens in one request. Both list the same capabilities, so nothing here separates them.
| Specification | Grok-4.7 | GPT-5.6 Sol |
|---|---|---|
| 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 | 16 Feb 2026 |
| Released | 21 Sep 2026 | 9 Jul 2026 |
| Status | Active | Active |
| Sold by | Perplexity | OpenAI, Perplexity |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Web search | Not listed | Not listed |
| Prompt caching | Yes | Yes |
| Code execution | Yes | Yes |
| Computer use | Not listed | Not listed |
| Open weights | Not listed | Not listed |
| Reasoning | Yes | Yes |
FAQs
- Is Grok-4.7 cheaper than GPT-5.6 Sol?
- Yes. A 1,000-token prompt with a 500-token reply costs $0.0050 on Grok-4.7 and $0.0140 on GPT-5.6 Sol, and the same model is cheaper on every workload on this page.
- How much do Grok-4.7 and GPT-5.6 Sol cost per 1M tokens?
- Grok-4.7 costs $2.00 for input and $6.00 for output. GPT-5.6 Sol costs $4.00 and $20.00. Standard pay-as-you-go rates, as of 23 Sep 2026.
- Which is better, Grok-4.7 or GPT-5.6 Sol?
- On published benchmarks, GPT-5.6 Sol. It leads on 6 of the 8 figures both models report, including overall intelligence (Intelligence Index), where it scores 47 against 46.4.
- Does Grok-4.7 or GPT-5.6 Sol offer batch pricing?
- GPT-5.6 Sol only. Its batch input costs $2.00, 50% off its standard rate, and Grok-4.7 lists no batch tier at all.
- Does Grok-4.7 or GPT-5.6 Sol have a bigger context window?
- GPT-5.6 Sol, at 1,050,000 tokens against 500,000. That is 550,000 more input tokens in a single request.