AI model comparison
Claude Opus 5.5 vs Grok 4.7
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Anthropic
Claude Opus 5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
- Input / 1M
- $4
- Output / 1M
- $20
- Context
- 1M
xAI
Grok 4.7
Grok 4.7 is SpaceXAI's flagship model for coding, agentic tasks, and knowledge work, succeeding Grok 4.6.
- Input / 1M
- $2
- Output / 1M
- $6
- Context
- 500K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Grok 4.7
2.6x cheaper for a typical chat
Higher intelligence score
Claude Opus 5.5
57.6 vs 46.4 on Artificial Analysis
Larger context window
Claude Opus 5.5
1M vs 500K tokens
Newer release
Claude Opus 5.5
Released September 22, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Claude Opus 5.557.6Coding index
Claude Opus 5.5Not availableAgentic index
Claude Opus 5.5Not availablePricing
Claude Opus 5.5 vs Grok 4.7 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | Claude Opus 5.5 | |
|---|---|---|
| Input tokensPer 1M tokens | $4 | $2 |
| Output tokensPer 1M tokens | $20 | $6 |
| Cached input (read)Per 1M tokens | $0.20 | $0.50 |
| Cache writePer 1M tokens | $5 | Not available |
| Long-context pricingPer 1M tokens, for very long prompts | Same rate at any length | $4 in / $12 out above 200K |
| Web searchPer request | $0.01 | $0.005 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Claude Opus 5.5$18Coding task
30K in, 4K out
Claude Opus 5.5$200$86 cachedLong document summary
150K in, 2K out
Claude Opus 5.5$640$70 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | Claude Opus 5.5 | |
|---|---|---|
| Context window | 1M tokens | 500K tokens |
| Max output | 128K tokens | 450K tokens |
| Input types | File, Image, Text | File, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low | Extra high, High, Medium, Low |
| Default reasoning effort | High | High |
| Release date | September 22, 2026 | September 21, 2026 |
Features
Supported features
API features available for each model.
| Metric | Claude Opus 5.5 | |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Not supported | Supported |
| Stop sequences | Supported | Not supported |
| Deterministic seed | Not supported | Supported |
| Verbosity control | Supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
Claude Opus 5.5View full model details- Claude Opus 5.5 vs Claude Sonnet 5.5
- Claude Opus 5.5 vs Claude Fable 5.1
- Claude Opus 5.5 vs GPT-6 Astra
- Claude Opus 5.5 vs GPT-6.1 Sol
- Claude Opus 5.5 vs Claude Opus 5
- Claude Opus 5.5 vs Claude Fable 5
- Claude Opus 5.5 vs DeepSeek V4.1 Flash
- Claude Opus 5.5 vs Muse Spark 1.3
- Claude Opus 5.5 vs GLM 5.3 Flash
- Claude Opus 5.5 vs GPT-6 Sol
- Claude Opus 5.5 vs MiMo-V2.6-Flash
- Claude Opus 5.5 vs GPT-5.6 Sol
- Claude Opus 5.5 vs Hy4 preview
- Claude Opus 5.5 vs GPT-6 Luna
- Claude Opus 5.5 vs DeepSeek V4 Flash 0731
- Claude Opus 5.5 vs GLM 5.3
- Claude Opus 5.5 vs Kimi K3
- Claude Opus 5.5 vs DeepSeek V4 Flash 0423
- Claude Opus 5.5 vs Step 5 Preview
- Claude Opus 5.5 vs Gemini 3.8 Flash
- Claude Opus 5.5 vs Hy3
- Claude Opus 5.5 vs Gemini 3.1 Pro Preview
- Grok 4.7 vs Claude Sonnet 5.5
- Grok 4.7 vs GPT-6 Astra
- Grok 4.7 vs GPT-6.1 Sol
- Grok 4.7 vs Muse Spark 1.3
- Grok 4.7 vs GPT-6 Sol
- Grok 4.7 vs GPT-5.6 Sol
- Grok 4.7 vs MiMo-V2.6-Pro
- Grok 4.7 vs Qwen3.8 Max (0902)
- Grok 4.7 vs GLM 5.3
- Grok 4.7 vs Grok 4.6
- Grok 4.7 vs Kimi K3
- Grok 4.7 vs Gemini 3.8 Flash
- Grok 4.7 vs Grok 4.5
Our take
Opus 5.5 is ahead on intelligence (57.6 vs 46.4) and is the safer default for coding and long-horizon work. Grok 4.7 is the one to reach for when you want a more current, less conservative voice, or you are already in xAI's stack.
FAQ
Frequently asked questions
Is Claude Opus 5.5 or Grok 4.7 cheaper?
Grok 4.7 is cheaper for a typical chat (2K input tokens and 500 output tokens). Grok 4.7 costs $2 per 1M input tokens and $6 per 1M output tokens, while Claude Opus 5.5 costs $4 per 1M input tokens and $20 per 1M output tokens.
Which has a bigger context window, Claude Opus 5.5 or Grok 4.7?
Claude Opus 5.5 supports up to 1M tokens of context, compared with 500K for Grok 4.7.
Is Claude Opus 5.5 smarter than Grok 4.7?
On the Artificial Analysis Intelligence Index, Claude Opus 5.5 scores 57.6 and Grok 4.7 scores 46.4, putting Claude Opus 5.5 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Claude Opus 5.5 and Grok 4.7 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Claude Opus 5.5 and Grok 4.7 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Claude Opus 5.5 and Grok 4.7 at the same time. Compare the answers side by side and keep the best one.