Claude Sonnet 5.5 vs Grok 4.7
How Anthropic's Claude Sonnet 5.5 and xAI's Grok 4.7 differ on paper, from the specs each provider publishes.
Compare them on your promptBoth answer side by side, free with your own API keys.
Key differences
- Claude Sonnet 5.5 accepts a larger context window: 1M tokens versus 500K for Grok 4.7.
- Claude Sonnet 5.5 can write longer replies, up to 128K output tokens against 33K.
- Claude Sonnet 5.5 lists extended thinking support that Grok 4.7 does not.
Side by side
| Spec | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| Provider | Anthropic | xAI |
| Released | September 2026 | September 2026 |
| Context window | 1M tokens | 500K tokens |
| Max output | 128K tokens | 33K tokens |
| Reasoning model | Yes | Yes |
| Price per 1M tokens (in / out) | $2 / $10 | See provider |
| Capabilities | Image input, Reasoning, Coding, Tool calling, Structured output, Extended thinking, Streaming | Image input, Reasoning, Coding, Tool calling, Structured output, Streaming |
Specs as published by each provider. Benchmarks and output quality aren't covered here; the best test is your own prompts.
Specs only go so far. Ask both.
Send one message and get Claude Sonnet 5.5 and Grok 4.7's answers side by side, with response time, tokens and cost for each. You'll need Anthropic and xAI keys.
Open Claude Sonnet 5.5 vs Grok 4.7