Cheaper overall
Grok-4.7
25% lower blended rate
Cheaper on long prompts
GPT-6.1 Sol
above 199,999 input tokens
Higher benchmark scores
GPT-6.1 Sol
leads on 5 of 8 figures
Bigger context window
GPT-6.1 Sol
1,050,000 vs 500,000 tokens
Cheaper cached input
GPT-6.1 Sol
$0.10 vs $0.50, 80% less
Where each one wins
GPT-6.1 Sol
- Cheaper cached input $0.10 vs $0.50, 80% less
- Cheaper on long prompts above 199,999 input tokens
- Larger context window 1,050,000 tokens
- Higher overall intelligence (Intelligence Index) 51.8 vs 46.4
- Higher expert-exam performance (Humanity's Last Exam) 52.9 vs 43.1
- Higher long-context reasoning (AA-LCR) 83 vs 76.7
- Ahead on 2 more benchmark figures
- Offers Batch, Flex and Priority pricing not listed for Grok-4.7
Grok-4.7
- Cheaper output tokens $6.00 vs $10.00, 40% less
- Higher scientific coding (SciCode) 57.4 vs 54.2
- Higher real-world task performance (GDPval) 59.8 vs 53.8
- Higher answer reliability (Omniscience Non-Hallucination) 70.7 vs 45.7
What four workloads cost
One run, and the same run a thousand times.
Caching is what decides it: over twenty calls GPT-6.1 Sol costs $0.2800 against $0.4640, a difference of $184.00 across a thousand loops.
| Workload | GPT-6.1 Sol | Grok-4.7 | ×1,000 | Difference |
|---|---|---|---|---|
| Chat turn 1,000 in / 500 out | $0.0070 | $0.0050 | $7.00 / $5.00 | Grok-4.7 is 29% cheaper |
| RAG answer 10,000 in / 800 out | $0.0280 | $0.0248 | $28.00 / $24.80 | Grok-4.7 is 11% cheaper |
| Agent loop 32,000 in / 700 out × 20 calls | $0.2800 | $0.4640 | $280.00 / $464.00 | GPT-6.1 Sol is 40% cheaper |
| Long document 400,000 in / 3,000 out | $1.65 | $1.64 | $1,645.00 / $1,636.00 | Grok-4.7 is 0.5% 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. That is where the cheaper model changes.
| Context band | Price | GPT-6.1 Sol | Grok-4.7 | Difference |
|---|---|---|---|---|
| Prompts up to 199,999 tokens | Input | $2.00 | $2.00 | Same |
| Prompts up to 199,999 tokens | Cached input | $0.10 | $0.50 | GPT-6.1 Sol is 80% cheaper |
| Prompts up to 199,999 tokens | Output | $10.00 | $6.00 | Grok-4.7 is 40% cheaper |
| Prompts up to 200,000 tokens | Input | $2.00 | $4.00 | GPT-6.1 Sol is 50% cheaper |
| Prompts up to 200,000 tokens | Cached input | $0.10 | $1.00 | GPT-6.1 Sol is 90% cheaper |
| Prompts up to 200,000 tokens | Output | $10.00 | $12.00 | GPT-6.1 Sol is 17% cheaper |
| Prompts up to 272,000 tokens | Input | $2.00 | $4.00 | GPT-6.1 Sol is 50% cheaper |
| Prompts up to 272,000 tokens | Cached input | $0.10 | $1.00 | GPT-6.1 Sol is 90% cheaper |
| Prompts up to 272,000 tokens | Output | $10.00 | $12.00 | GPT-6.1 Sol is 17% cheaper |
| Prompts over 272,000 tokens | Input | $4.00 | $4.00 | Same |
| Prompts over 272,000 tokens | Cached input | $0.20 | $1.00 | GPT-6.1 Sol is 80% cheaper |
| Prompts over 272,000 tokens | Output | $15.00 | $12.00 | Grok-4.7 is 20% cheaper |
Blended: GPT-6.1 Sol $4.00, Grok-4.7 $3.00 per 1M — one rate at 3:1 input to output, for comparing two models at a glance.
GPT-6.1 Sol priced by OpenAI, Grok-4.7 by Perplexity. Standard tier, pay-as-you-go.
Other pricing tiers
Only GPT-6.1 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 | GPT-6.1 Sol | Grok-4.7 | Cheaper |
|---|---|---|---|
| Batch only on GPT-6.1 Sol | $1.00 in / $5.00 out 50% off Standard | Not offered | — |
| Flex only on GPT-6.1 Sol | $1.00 in / $5.00 out 50% off Standard | Not offered | — |
| Priority only on GPT-6.1 Sol | $4.00 in / $20.00 out | Not offered | — |
Benchmarks
They share 8 figures: GPT-6.1 Sol leads on 5, Grok-4.7 on 3. The widest gap is 25 points, on answer reliability (Omniscience Non-Hallucination).
Overall intelligence
Intelligence Index — Overall intelligence across reasoning, knowledge & math evals
GPT-6.1 Sol ahead by 5.4
Expert-exam performance
Humanity's Last Exam — Expert-level questions across many academic domains
GPT-6.1 Sol ahead by 9.8
Long-context reasoning
AA-LCR — Long-context reasoning across large inputs
GPT-6.1 Sol ahead by 6.3
Scientific coding
SciCode — Research-level scientific coding tasks
Grok-4.7 ahead by 3.2
Physics research reasoning
CritPt — Unpublished physics research reasoning problems
GPT-6.1 Sol ahead by 14
Real-world task performance
GDPval — Economically valuable, real-world knowledge work
Grok-4.7 ahead by 6
Factual accuracy
Omniscience Accuracy — Breadth of factual knowledge across domains
GPT-6.1 Sol ahead by 14.7
Answer reliability
Omniscience Non-Hallucination — How reliably the model avoids fabricated answers
Grok-4.7 ahead by 25
Each figure is that model's best published run, with the effort level named beside it — where these scores come from.
Specifications
GPT-6.1 Sol holds 550,000 more input tokens in one request. Only GPT-6.1 Sol lists web search and computer use.
| Specification | GPT-6.1 Sol | Grok-4.7 |
|---|---|---|
| Context window | 1,050,000 tokens | 500,000 tokens |
| Max output | 128,000 tokens | — |
| Takes in | Text, image, file | Text, image, file |
| Puts out | Text | Text |
| Knowledge cutoff | 30 Apr 2026 | 31 May 2026 |
| Released | 29 Sep 2026 | 21 Sep 2026 |
| Status | Active | Active |
| Sold by | OpenAI, Perplexity | Perplexity |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Web search | Yes | Not listed |
| Prompt caching | Yes | Yes |
| Code execution | Yes | Yes |
| Computer use | Yes | Not listed |
| Open weights | Not listed | Not listed |
| Reasoning | Yes | Yes |
FAQs
- Is GPT-6.1 Sol cheaper than Grok-4.7?
- No — the other way round. A 1,000-token prompt with a 500-token reply costs $0.0070 on GPT-6.1 Sol and $0.0050 on Grok-4.7.
- How much do GPT-6.1 Sol and Grok-4.7 cost per 1M tokens?
- GPT-6.1 Sol costs $2.00 for input and $10.00 for output. Grok-4.7 costs $2.00 and $6.00. Standard pay-as-you-go rates, as of 29 Sep 2026.
- Which is better, GPT-6.1 Sol or Grok-4.7?
- On published benchmarks, GPT-6.1 Sol. It leads on 5 of the 8 figures both models report, including overall intelligence (Intelligence Index), where it scores 51.8 against 46.4.
- Is GPT-6.1 Sol or Grok-4.7 cheaper for long prompts?
- GPT-6.1 Sol, above 199,999 input tokens. A rate that changes at a context length applies to the whole request, not only the tokens past it, so the switch is sharp rather than gradual.
- Does GPT-6.1 Sol or Grok-4.7 offer batch pricing?
- GPT-6.1 Sol only. Its batch input costs $1.00, 50% off its standard rate, and Grok-4.7 lists no batch tier at all.
- Does GPT-6.1 Sol or Grok-4.7 have a bigger context window?
- GPT-6.1 Sol, at 1,050,000 tokens against 500,000. That is 550,000 more input tokens in a single request.