Cheaper overall
Grok-4.7
25% lower blended rate
Cheaper on long prompts
Claude Sonnet 5.5
above 199,999 input tokens
Higher benchmark scores
Claude Sonnet 5.5
leads on 13 of 14 figures
Bigger context window
Claude Sonnet 5.5
1,000,000 vs 500,000 tokens
Cheaper cached input
Claude Sonnet 5.5
$0.10 vs $0.50, 80% less
Where each one wins
Claude Sonnet 5.5
- Cheaper cached input $0.10 vs $0.50, 80% less
- Cheaper on long prompts above 199,999 input tokens
- Larger context window 1,000,000 tokens
- Higher overall intelligence (Intelligence Index) 56 vs 46.4
- Higher expert-exam performance (Humanity's Last Exam) 55 vs 43.1
- Higher long-context reasoning (AA-LCR) 82.7 vs 80
- Ahead on 10 more benchmark figures
- Offers Batch pricing not listed for Grok-4.7
Grok-4.7
- Cheaper output tokens $6.00 vs $10.00, 40% less
- Higher answer reliability (Omniscience Non-Hallucination) 70.7 vs 53
What four workloads cost
One run, and the same run a thousand times.
The gap opens on long prompts: Claude Sonnet 5.5 costs $0.8300 against $1.64, a difference of $806.00 over a thousand runs.
| Workload | Claude Sonnet 5.5 | 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 | Claude Sonnet 5.5 is 40% cheaper |
| Long document 400,000 in / 3,000 out | $0.8300 | $1.64 | $830.00 / $1,636.00 | Claude Sonnet 5.5 is 49% 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 | Claude Sonnet 5.5 | 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 | Claude Sonnet 5.5 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 | Claude Sonnet 5.5 is 50% cheaper |
| Prompts up to 200,000 tokens | Cached input | $0.10 | $1.00 | Claude Sonnet 5.5 is 90% cheaper |
| Prompts up to 200,000 tokens | Output | $10.00 | $12.00 | Claude Sonnet 5.5 is 17% cheaper |
| Prompts over 200,000 tokens | Input | $2.00 | $4.00 | Claude Sonnet 5.5 is 50% cheaper |
| Prompts over 200,000 tokens | Cached input | $0.10 | $1.00 | Claude Sonnet 5.5 is 90% cheaper |
| Prompts over 200,000 tokens | Output | $10.00 | $12.00 | Claude Sonnet 5.5 is 17% cheaper |
Blended: Claude Sonnet 5.5 $4.00, Grok-4.7 $3.00 per 1M — one rate at 3:1 input to output, for comparing two models at a glance.
Claude Sonnet 5.5 priced by Anthropic, Grok-4.7 by Perplexity. Standard tier, pay-as-you-go.
Other pricing tiers
Only Claude Sonnet 5.5 lists Batch, at up to 50% off its own standard rate; Grok-4.7 does not offer it.
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 | Claude Sonnet 5.5 | Grok-4.7 | Cheaper |
|---|---|---|---|
| Batch only on Claude Sonnet 5.5 | $1.00 in / $5.00 out 50% off Standard | Not offered | — |
Benchmarks
They share 14 figures: Claude Sonnet 5.5 leads on 13, Grok-4.7 on 1. The widest gap is 209 points, on 3d Elo.
Overall intelligence
Intelligence Index — Overall intelligence across reasoning, knowledge & math evals
Claude Sonnet 5.5 ahead by 9.6
Expert-exam performance
Humanity's Last Exam — Expert-level questions across many academic domains
Claude Sonnet 5.5 ahead by 11.9
Long-context reasoning
AA-LCR — Long-context reasoning across large inputs
Claude Sonnet 5.5 ahead by 2.7
Scientific coding
SciCode — Research-level scientific coding tasks
Claude Sonnet 5.5 ahead by 3.2
Physics research reasoning
CritPt — Unpublished physics research reasoning problems
Claude Sonnet 5.5 ahead by 13.4
Real-world task performance
GDPval — Economically valuable, real-world knowledge work
Claude Sonnet 5.5 ahead by 6.3
Factual accuracy
Omniscience Accuracy — Breadth of factual knowledge across domains
Claude Sonnet 5.5 ahead by 4.2
Answer reliability
Omniscience Non-Hallucination — How reliably the model avoids fabricated answers
Grok-4.7 ahead by 17.7
3d Elo
Design Arena head-to-head rating in the 3d category
Claude Sonnet 5.5 ahead by 209
Codecategories Elo
Design Arena head-to-head rating in the codecategories category
Claude Sonnet 5.5 ahead by 97
Dataviz Elo
Design Arena head-to-head rating in the dataviz category
Claude Sonnet 5.5 ahead by 149
Gamedev Elo
Design Arena head-to-head rating in the gamedev category
Claude Sonnet 5.5 ahead by 145
Uicomponent Elo
Design Arena head-to-head rating in the uicomponent category
Claude Sonnet 5.5 ahead by 104
Website Elo
Design Arena head-to-head rating in the website category
Claude Sonnet 5.5 ahead by 76
Each figure is that model's best published run, with the effort level named beside it — where these scores come from.
Specifications
Claude Sonnet 5.5 holds 500,000 more input tokens in one request. Only Grok-4.7 lists code execution.
| Specification | Claude Sonnet 5.5 | Grok-4.7 |
|---|---|---|
| Context window | 1,000,000 tokens | 500,000 tokens |
| Max output | 128,000 tokens | — |
| Takes in | Text, image, file | Text, image, file |
| Puts out | Text | Text |
| Knowledge cutoff | — | 31 May 2026 |
| Released | 28 Sep 2026 | 21 Sep 2026 |
| Status | Active | Active |
| Sold by | Anthropic, Perplexity | Perplexity |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Web search | Not listed | Not listed |
| Prompt caching | Yes | Yes |
| Code execution | Not listed | Yes |
| Computer use | Not listed | Not listed |
| Open weights | Not listed | Not listed |
| Reasoning | Yes | Yes |
FAQs
- Is Claude Sonnet 5.5 cheaper than Grok-4.7?
- No — the other way round. A 1,000-token prompt with a 500-token reply costs $0.0070 on Claude Sonnet 5.5 and $0.0050 on Grok-4.7.
- How much do Claude Sonnet 5.5 and Grok-4.7 cost per 1M tokens?
- Claude Sonnet 5.5 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 8 Oct 2026.
- Which is better, Claude Sonnet 5.5 or Grok-4.7?
- On published benchmarks, Claude Sonnet 5.5. It leads on 13 of the 14 figures both models report, including overall intelligence (Intelligence Index), where it scores 56 against 46.4.
- Is Claude Sonnet 5.5 or Grok-4.7 cheaper for long prompts?
- Claude Sonnet 5.5, 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 Claude Sonnet 5.5 or Grok-4.7 offer batch pricing?
- Claude Sonnet 5.5 only. Its batch input costs $1.00, 50% off its standard rate, and Grok-4.7 lists no batch tier at all.
- Does Claude Sonnet 5.5 or Grok-4.7 have a bigger context window?
- Claude Sonnet 5.5, at 1,000,000 tokens against 500,000. That is 500,000 more input tokens in a single request.